Errors and Troubleshooting

TROUBLE SHOOTING MANUAL FOR S88_ 2.1Mw_STV TURBINE

SCS ALARMS

INTRODUCTION: This Manual contains the procedures to troubleshoot all the alarms for S88 SCS Standard Temperature Version (STV) The error description was given as per the alarm listing in our SC Commander starting from index 0. The description was prepared based on the software version CSM88P25.m Each alarm description contains the following details

→ Index no. → Brake Program → Yaw Program → Reset Level → Set Delay

The above said Points are subjected to change with respect to the Software version as well as Temperature version of the Wind Turbine Generator Prepared by : P.Vijaya Kumar

Approved by : D.Rajesh DGM (Engg.)

Version : RD.S88.01 Date : 22 / 09 / 2006

System_OK

Index Brake Program Yaw Program Reset Level Set Delay (ms) FM0 0 0 3 0

♦ Root Cause:

This alarm is called when there is no error in the turbine excluding warning alarms

♦ Remedial Action:

1. No remedial action required as this is the error free state of turbine and this is the desirable alarm

RS_ManualFastStop


♦ Root Cause:

This alarm is called when we stop the turbine by pressing STOP button twice (double click) either in visualization or in WT305


1. We use this facility to work in the turbine under stopped condition if any 2. Pitch speed for the alarm is as per the Brake Program 3. Turbine will start only when we press the START button.

RS_ManualSoftStop


♦ Root Cause:

This alarm is called when we stop the turbine by pressing STOP button once (single click) either in visualization or in WT305


1. We use this facility to work in the turbine under stopped condition if any 2. Pitch speed for the alarm is limited to minimum speed (< 1 deg/ second) 3. Turbine will start only when we press the START button.

RS_Emergency_BottomStop


♦ Root Cause:

This alarm is called when we Press the bottom Emergency PUSH button


1. We use this facility to work in the turbine under stopped condition or under emergency condition if any

2. Safety chain will open and ACB will trip 3. Turbine will start only when we release the PUSH button

RS_Emergency_TopStop


♦ Root Cause:

This alarm is called when we Press any one of the top Emergency PUSH button


1. We use this facility to work in the turbine under stopped condition or under emergency condition if any

2. Safety chain will open and ACB will trip 3. Turbine will start only when we release the PUSH button

RS_ErrorTest


♦ Root Cause:

Remote error test, list of alarm server sense system


1. This facility is used by the programmer for the error test during program updation

SE_CFC0_Memory_Low warn


♦ Place of the problem: Problem is related to the controller

♦ Root Cause:

This alarm is called when there is a memory full in Compaq Flash (CF) card


1. Manually save the data from the CF card 2. After saving the data clear the memory of CF card This error is normally occurs

manually save the due to continuous running of turbine 3. Start the turbine and be happy

RS_YawStop_manuell


♦ Root Cause:

This alarm is called when we Press the STOP button (Yaw control) either in the visualization or in WT305


1. We use this facility to work in the turbine (Yaw system) under stopped condition or under emergency condition if any

2. Turbine will start only when press the AUTO button (Yaw control)

Temp_GearBox_IMS_NDE_HighStop


♦ Place of the problem: Problem is related to the Nacelle

♦ Root Cause:

If there is any abnormal temperature rise in the Gearbox intermediate section in the non driven end

♦ Reason:

We will get the Alarm only if measured value is greater than maximum stop level parameter Temp_GearBox_IMS_NDE (100 deg)


1. Using M-Manager, Take the fast log and event log of the particular alarm 2. Take the necessary safety items, circuit diagram, tools including measuring

devices like multi meter 3. Initially check for the loose connection from the sensor to the PTAI 216 module if

found ok then 4. Measure the ohmic value of the PT100 sensor in the terminal block if found ok

then 5. Check for the proper functionality of the particular PTAI pin if found ok then 6. If the temperature rise was real then check for the proper lubrication inside the

gear box intermediate section in the non driven end 7. Replace the worned parts if any 8. Start the turbine and be happy

RS_NewProgram


♦ Root Cause:

This alarm is called whenever we update the application software in the turbine


1. This alarm indicates that there is a new program update done in the machine

SE_RebootPLC


♦ Place of the problem: Problem is related to the Bottom Panel and Control Panel

♦ Root Cause:

Alarm is called if the PLC rebooted

♦ Reason:

Missing of the 24V DC at the NT250 power supply module / synchronization problem of both fast bus modules



devices like multi meter 3. Check the 24V DC at the NT250 power supply module. If OK then 4. Check for the loose connection in all Bachmann modules, if OK then 5. Check the warning for the fast bus synchronization problem in the previous log

book and current log book by connecting M-Manager, if you found 6. Check the optical cable, jumper setting of the fast bus modules and functionality

of all Bachmann modules 7. Replace the worned parts if required 8. Start the turbine and be happy

RS_TopServiceStop


♦ Root Cause:

This alarm is called when we switch on the service stop button in top panel


1. We use this facility to work in the turbine under stopped condition if any 2. Turbine will start only when we switch off the service button

Temp_GearBox_IMS_DE_HighStop



♦ Root Cause:

If there is any abnormal temperature rise in the Gearbox intermediate section in the driven end

♦ Reason:

We will get the Alarm only if measured value is greater than maximum stop level parameter Temp_GearBox_IMS_DE (95 deg)






gear box intermediate section in the driven end 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_GearBox_IMS_DE_HighWarn



♦ Root Cause:

If there is any abnormal temperature rise in the Gearbox intermediate section in the driven end

♦ Reason:

We will get the Alarm only if measured value is greater than maximum warn level parameter Temp_GearBox_IMS_DE (90 deg)






gear box intermediate section in the driven end 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_GeneratorBearing_DE_HighStop



♦ Root Cause:

If there is any abnormal temperature rise in the Generator bearing in the driven end

♦ Reason: We will get the Alarm only if measured value is greater than maximum stop level parameter Temp_GeneratorBearing_DE (100 deg)





then 5. Check for the proper functionality of the particular PTAI pin if found ok then 6. If the temperature rise was real then check for the proper greasing in the

generator bearing driven end also check for proper alignment of generator 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_GeneratorBearing_DE_HighWarn



♦ Root Cause:

If there is any abnormal temperature rise in the Generator bearing in the driven end

♦ Reason: We will get the Alarm only if measured value is greater than maximum warn level parameter Temp_GeneratorBearing_DE (98 deg)






generator bearing driven end also check for proper alignment of generator 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_GeneratorBearing_NDE_HighStop



♦ Root Cause:

If there is any abnormal temperature rise in the Generator bearing in the non driven end

♦ Reason: We will get the Alarm only if measured value is greater than maximum stop level parameter Temp_GeneratorBearing_NDE (100 deg)






generator bearing non driven end 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_GeneratorBearing_NDE_HighWarn



♦ Root Cause:

If there is any abnormal temperature rise in the Generator bearing in the non driven end

♦ Reason: We will get the Alarm only if measured value is greater than maximum warn level parameter Temp_GeneratorBearing_NDE (98 deg)






generator bearing non driven end 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_G1L1_HighStop



♦ Root Cause:

If there is any abnormal temperature rise in the Generator Winding (L1)

♦ Reason: We will get the Alarm only if measured value is greater than maximum stop level parameter Temp_G1L1 (150 deg)





then 5. Check for the proper functionality of the particular PTAI pin if found ok then 6. If the temperature rise was real then check for the proper cooing system in the

generator 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_G1L1_HighWarn



♦ Root Cause:


♦ Reason: We will get the Alarm only if measured value is greater than maximum warn level parameter Temp_G1L1 (148 deg)







Temp_G1L2_HighStop



♦ Root Cause:









Temp_G1L2_HighWarn



♦ Root Cause:









Temp_G1L3_HighStop



♦ Root Cause:









Temp_G1L3_HighWarn



♦ Root Cause:









Temp_OilSump_HighStop



♦ Root Cause:

If there is any abnormal temperature rise in the Gear box oil

♦ Reason: We will get the Alarm only if measured value is greater than maximum stop level parameter Temp_GearBoxOilSump (80 deg)



devices like multi meter 3. Initially check for the loose connection from the sensor to the AIO 288 module if


then 5. Check for the proper functionality of the particular AIO 288 pin if found ok then 6. If the temperature rise was real then check for the proper cooing system (Oil

cooler motor & Filter motor) 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_OilSump_HighWarn



♦ Root Cause:

If there is any abnormal temperature rise in the Gear box oil

♦ Reason: We will get the Alarm only if measured value is greater than maximum warn level parameter Temp_GearBoxOilSump (75 deg)





then 5. Check for the proper functionality of the particular AIO 288 pin if found ok then 6. If the temperature rise was real then check for the proper cooing system (Oil

cooler motor & Filter motor) 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_OilSump_LowWarn



♦ Root Cause:

If there is abnormal temperature decrease below the standard level in the Gear box oil

♦ Reason: We will get the Alarm only if measured value is less than minimum warn level parameter Temp_GearBoxOilSump (10 deg)





then 5. Check for the proper functionality of the particular AIO 288 pin if found ok then 6. Check for the proper functionality of Gear box heater 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_OilSump_LowStop



♦ Root Cause:

If there is abnormal temperature decrease below the standard level in the Gear box oil

♦ Reason: We will get the Alarm only if measured value is less than minimum Stop level parameter Temp_GearBoxOilSump (-5 deg)





then 5. Check for the proper functionality of the particular AIO 288 pin if found ok then 6. Check for the proper functionality of Gear box heater 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_GearBox_HSS_DE_HighStop



♦ Root Cause:

If there is any abnormal temperature rise in the Gearbox High speed shaft section in the driven end

♦ Reason:

We will get the Alarm only if measured value is greater than maximum stop level parameter Temp_GearBox_HSS_DE (95 deg)






gear box HSS section in the driven end 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_MainBearing_HighStop



♦ Root Cause:

If there is any abnormal temperature rise in the Main bearing

♦ Reason: We will get the Alarm only if measured value is greater than maximum stop level parameter Temp_Hub Bearing (70 deg)





then 5. Check for the proper functionality of the particular PTAI pin if found ok then 6. If the temperature rise was real then check for the proper lubrication to the Hub

bearing 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_MainBearing_HighWarn



♦ Root Cause:

If there is any abnormal temperature rise in the Main bearing

♦ Reason: We will get the Alarm only if measured value is greater than maximum warn level parameter Temp_Hub Bearing (65 deg)





then 5. Check for the proper functionality of the particular PTAI pin if found ok then 6. If the temperature rise was real then check for the proper lubrication to the Hub

bearing 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_Nacelle_HighStop



♦ Root Cause:

If there is any abnormal temperature rise in the Nacelle

♦ Reason: We will get the Alarm only if measured value is greater than maximum stop level parameter Temp_Nacelle (60 deg)





then 5. Check for the proper functionality of the particular PTAI pin if found ok then 6. If the temperature rise was real then check for the proper cooling system

(Nacelle fan) 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_Nacelle_HighWarn



♦ Root Cause:

If there is any abnormal temperature rise in the Nacelle

♦ Reason: We will get the Alarm only if measured value is greater than maximum warn level parameter Temp_Nacelle (50 deg)





then 4. Check for the proper functionality of the particular PTAI pin if found ok then 5. If the temperature rise was real then check for the proper cooling system

(Nacelle fan) 6. Replace the worned parts if any 7. Start the turbine and be happy

Temp_CapPanel_HighStop


♦ Place of the problem: Problem is related to the Bottom Panel

♦ Root Cause:

If there is any abnormal temperature rise in the Capacitor Panel

♦ Reason: We will get the Alarm only if measured value is greater than maximum stop level parameter Temp_BottomCapSection (60 deg)





then 5. Check for the proper functionality of the particular AIO 288 pin if found ok then 6. If the temperature rise was real then check for the proper function of cooling

fans 7. Replace the worned parts if any 8. Start the turbine and be happy

Mech_BrakeProgr4_Timeout Stop


♦ Place of the problem: Problem is related to the hub and nacelle

♦ Root Cause:

Alarm is called if the generator rpm is more than 100 rpm during brake program

♦ Reason:

After the turbine status 24, generator rpm should immediately reduced to less than 100 rpm



devices like multi meter 3. Check for the proper pitch out function of all 3 blades during brake program, If

OK then 4. By using service password, please check the parameters which is related to the

PID controller in the visualization 5. Check the gap setting of the generator speed sensor, if OK then 6. Check the functionality of generator speed sensor by moving the metal object in

front of that and observe the LED status. If OK then 7. Check for the loose connection from sensor to CNT 204 module 8. Replace the worned parts if required 9. Start the turbine and be happy

Temp_GearBox_IMS_NDE_LowStop



♦ Root Cause:

If there is any temperature decrease below the standard level in the Gearbox intermediate section in the non driven end

♦ Reason:

We will get the Alarm only if measured value is less than minimum stop level parameter Temp_GearBox_IMS_NDE (5 deg)





then 5. Check for the proper functionality of the particular PTAI pin if found ok then 6. Check for the proper function of gear box heater 7. Replace the worned parts if any 8. Start the turbine and be happy




♦ Root Cause:


♦ Reason:








Temp_ReducedPower


♦ Place of the problem: Problem is related to the nacelle

♦ Root Cause:

Reduced Power status will arise if there is any problem with temperature

♦ Reason:

We will get this status if there is any abnormal increase of the following temperatures Temp_G1L1_High Warn ; Temp_G1L2_High Warn ; Temp_G1L3_High Warn ; Temp_GeneratorBearing_NDE High warn ; Temp_GB_IMS DE_High warn ; Temp_GeneratorBearing_DE High warn ; Temp_Oil sump_High warn ; Temp_GB HSS_NDE High warn



devices like multi meter 3. After keenly observing the logs check whether the alarm comes because of

which temperature and check the corresponding motor for the proper function 4. Check the condition of the oil cooler bellow and generator bellow 5. Check for the loose connection of the corresponding temperature sensor from

the terminal of the sensor to PTAI 216 / AIO288 modules 6. Check the resistance value of the particular PT100 / RTD sensor 7. Replace the worned parts if required 8. Start the turbine and be happy

Mech_GearOilFilter_ChokedStop


♦ Place of the problem: Problem is related to the Top Panel

♦ Root Cause: Alarm is called if the digital input of the DIO 280 module is high

♦ Reason:

We will get the alarm when DI_GearOilFilter_Choked is high



devices like multi meter 3. Physically check for the gear oil filter unit for dust blockage. 4. If blocked then immediately check the viscosity of the gear oil as per standard 5. If not blocked then check for the loose connection from DIO module to Gear oil

filter choked sensor 6. Check the functionality of both the sensor and the particular digital input 7. Replace the worned parts if required 8. Start the turbine and be happy

Mech_SwitchOffArea_NacellePos




♦ Reason:

We will get the alarm when DI_NorthPosition is low when turbines reach exact north position



devices like multi meter 3. Check for the loose connection from DIO module to North position sensor 4. Check the functionality of both the sensor and the particular digital input if found

ok then 5. Re do the North position calibration in the turbine 6. Replace the worned parts if required 7. Start the turbine and be happy

Hyd_GearOilLevel_LowStop



♦ Root Cause: Alarm is called if the digital input of the DIO 280 module is low

♦ Reason:

We will get the alarm when DI_GearOil_Level is low



devices like multi meter 3. Physically check for the gear oil leakage thoroughly and check for the quantity of

oil 4. Check for the loose connection from DIO module to Gear oil level sensor 5. Check the functionality of both the sensor and the particular digital input 6. Replace the worned parts if required 7. Start the turbine and be happy

Hyd_GearOilPressure_LowStop




♦ Reason:

We will get the alarm when DI_GearOil_Pressure is low



devices like multi meter 3. Physically check for the gear oil leakage thoroughly also check for the quantity of

oil 4. Also check the whether the filter motor is running normally 5. Check for the loose connection from DIO module to Pressure switch 6. Check the functionality of both the Pressure switch and the particular digital

input 7. Replace the worned parts if required 8. Start the turbine and be happy

Mech_WindSpeed1_2_DefStop



♦ Root Cause:

Problem with the wind speed which is measured by anemometer 1 & 2

♦ Reason:

We will get the Alarm only if there is any wire break or failure of the sensor



devices like multi meter 3. Check the mechanical moment of the anemometer 1 & 2. If OK then 4. Check for the loose connection at the connectors as per the circuit 5. Check the operating supply (24V DC) of the anemometer 1 & 2, if OK then 6. Check the output of the anemometer 1 & 2. If OK then 7. Check the functionality of the PTAI 216 module 8. Replace the worned parts if required 9. Start the turbine and be happy

Mech_Anemometer_DefStop



♦ Root Cause:

We will get the alarm after anemometer test

♦ Reason:

We will get this alarm if the generator rpm is not reasonable with the wind speed at fixed pitch angle



devices like multi meter 3. Check the mechanical moment of the anemometer / wind speed sensor. If OK

then 4. Check the operating supply 24V DC of the anemometer, if OK then 5. Check the voltage output of the anemometer. If OK then 6. Check the functionality of the PTAI 216 module 7. Replace the worned parts if required 8. Start the turbine and be happy

Mech_FastBrake_Timeout Stop



♦ Root Cause:


♦ Reason:








Mech_SoftBrake_Timeout Stop



♦ Root Cause:


♦ Reason:








Mech_WindSpeed_DiffStop



♦ Root Cause:

Problem with difference in wind speed which is measured by the anemometer 1 & 2

♦ Reason:

We will get the Alarm only if AI_Intern_WindSpeed Diff is greater than the specified parameter (+2 m/s or – 2 m/s)



devices like multi meter 3. Check the mechanical moment of the anemometer / wind speed sensor. If OK

then 4. Check the operating supply 24V DC of the anemometer, if OK then 5. Check the voltage output of the anemometer. If OK then 6. Check the functionality of the PTAI 216 module 7. Replace the worned parts if required 8. Start the turbine and be happy

Mech_DiscBrake_NotReleased



♦ Root Cause:

Alarm is called if the particular digital input of the DIO 280 module is low

♦ Reason:

Missing of the 24V DC from the brake free sensor



devices like multi meter 3. Check the brake free sensor mechanically for proper function of its movements 4. Check for the loose connection from sensor to DIO 280 module 5. Check the 24V DC output from the brake free sensor. 6. Here you should get 24V DC if not then replace the worned parts 7. Start the turbine and be happy

Mech_SwitchTwistCCW_EndStop




♦ Reason: We will get the alarm when DI_CableTwisted_CCW is high



devices like multi meter 3. Initially check whether the cables are twisted fully 4. Untwist the cables through manual yawing and make north setting as well as

twist stop sensor switch setting as per standard 5. Start the turbine and be happy

Mech_SwitchTwistCW_EndStop


♦ Place of the problem: ♦

Problem is related to the nacelle


♦ Reason:

We will get the alarm when DI_CableTwisted_CW is high



devices like multi meter 3. Initially check whether the cables are twisted fully 4. Untwist the cables through manual yawing and make north setting as well as

twist stop sensor switch setting as per standard 5. Start the turbine and be happy

Mech_Generator_PeakSpeedStop



♦ Root Cause: Alarm is called if the measured value is greater than high stop parameter

♦ Reason: We will get the alarm when measured value is greater than AI_intern_SpeedGenerator (1750 rpm)



devices like multi meter 3. After keenly observing the logs find whether generator rpm increases during

Cutin Time

4. Check the complete functionality of the IXYS soft starter i.e. if there is prolonged synchronization then there is a possibility for rpm to increase drastically

5. Also check the gap setting for the Generator speed sensor

Running Time

6. Check the gap setting for the Generator speed sensor 7. Check whether the pitch angle of all three blades are same using logs 8. Replace the worned parts if required 9. Start the turbine and keenly observe for corresponding rpm value if found OK be

happy

Mech_RotorFR_OverSpeedStop



♦ Root Cause: Alarm is called if the signal is low in DIO 280

♦ Reason:

We will get the alarm when signal DI_OverSpeed_External is low



devices like multi meter 3. After keenly observing the logs find whether Rotor_FR rpm increases during

Cutin Time


5. Also check the gap setting for the Rotor_FR speed sensor 6. Check for the loose connection from FR1 monitor to DIO280 module

Running Time

7. Check the gap setting for the Rotor_FR speed sensor 8. Check for the loose connection from FR1 monitor to DIO280 module 9. Check whether the pitch angle of all three blades are same using logs 10. Replace the worned parts if required 11. Start the turbine and keenly observe for corresponding rpm value if found OK be

happy

Mech_Rotor_PeakSpeedStop




♦ Reason: We will get the alarm when measured value is greater than AI_intern_SpeedRotor (19 rpm)



devices like multi meter 3. After keenly observing the logs find whether rotor rpm increases during

Cutin Time


5. Also check the gap setting for the Rotor speed sensor

Running Time

6. Check the gap setting for the Rotor speed sensor 7. Check whether the pitch angle of all three blades are same using logs 8. Replace the worned parts if required 9. Start the turbine and keenly observe for corresponding rpm value if found OK be

happy

Mech_RPM_DiffStop




♦ Reason:

We will get the alarm when measured value is greater than AI_intern_RpmDiff (+50 / -50 rpm)



devices like multi meter 3. After keenly observing the logs find whether generator rpm / rotor rpm jumps 4. After finding check the functionality of the corresponding sensor also check for

the proper gap distance as per the standard 5. Replace the worned parts if required 6. Start the turbine and keenly observe for corresponding rpm value if found OK be

happy

Mech_TowerVib_stop


♦ Place of the problem: Problem is related to the nacelle control panel and particularly for the PCH 1026 digital structural vibration monitor

♦ Root Cause:

Alarm is called if the digital input of the DIO 280 module is low

♦ Reason:

Problem with the abnormal vibration of the tower due to misalignment of the nacelle accessories (or) missing of the 24V DC from the PCH1026 to DIO 280 module


1. Using M-Manager, Take the fast log and event log of the particular alarm 2. Take the necessary safety items, circuit diagram, tools including measuring devices

like multi meter 3. Check the nacelle accessories (Gear Box, Generator etc...) for the misalignment. If

you found OK, then 4. Compare the pitch angle of all 3 blades and it should be same. If its OK, then 5. Check the 24V DC output from the PCH 1026 digital structural vibration monitor.

Here you should get 24V DC if not then replace the PCH 1026 monitor. 6. Start the turbine and observe for vibration. 7. If you found OK be happy.

Mech_TowerVib_warn


♦ Place of the problem: Problem is related to the nacelle control and particularly for PCH 1026 digital structural vibration monitor

♦ Root Cause:


♦ Reason:






Here you should get 24V DC if not then replace the PCH 1026 monitor. 6. Start the turbine and observe for vibration. 7. If you found OK be happy

Mech_DriveTrainVib_stop


♦ Place of the problem: Problem is related to the nacelle control panel and particularly for PCH 1026 digital structural vibration monitor

♦ Root Cause:


♦ Reason:

Problem with the abnormal vibration of the Gear box due to misalignment of the nacelle accessories (or) missing of the 24V DC from the PCH1026 to DIO 280 module





Here you should get 24V DC if not then replace the PCH 1026 monitor. 6. Start the turbine and observe for vibration 7. If you found OK be happy.

Mech_DriveTrainVib_warn



♦ Root Cause:


♦ Reason:

Problem with the abnormal vibration of the Gearbox due to misalignment of the nacelle accessories (or) missing of the 24V DC from the PCH1026 to DIO 280 module





Here you should get 24V DC if not then replace the PCH 1026 monitor. 6. Start the turbine and observe for vibration 7. If you found OK be happy

Mech_VibrationSwitch_Stop


♦ Place of the problem: Problem is related to the nacelle and particularly for vibration sensor

♦ Root Cause:

Alarm is called if the digital input of the DIO 280 module is high

♦ Reason:

Problem with the abnormal vibration of the tower due to misalignment of the nacelle accessories and DI_VibrationSensorMech is high



devices like multi meter 3. Check the nacelle accessories (Gear Box, Generator etc...) for the misalignment.

If you found OK, then 4. Compare the pitch angle of all 3 blades and it should be same. If its OK, then 5. Check the NO contact wiring of Vibration sensor(Shake sensor) 6. Start the turbine and observe for vibration. 7. If you found OK be happy.

Mech_WindVane1_2_DefStop



♦ Root Cause:

Problem with the wind direction which is measured by Wind Vane sensor 1 & 2

♦ Reason:

We will get the Alarm only if there is any wire break or failure of the sensor



devices like multi meter 3. Check the mechanical moment of the wind vane 1 & 2 / wind direction sensor. If

OK then 4. Check for the loose connection at the connectors as per the circuit 5. Check the operating supply (24V DC) of the wind vane 1 & 2, if OK then 6. Check the output of the wind vane 1 & 2. If OK then 7. Check the functionality of the PTAI 216 module 8. Replace the worned parts if required 9. Start the turbine and be happy

Mech_WindVane1_DefectWarn



♦ Root Cause:

Problem with the wind direction which is measured by Wind Vane sensor 1

♦ Reason:

We will get the Alarm only if there is no change in the measured wind direction



devices like multi meter 3. Check the mechanical moment of the wind vane 1 / wind direction sensor. If OK

then 4. Check for the loose connection at the connectors as per the circuit 5. Check the operating supply (24V DC) of the wind vane 1, if OK then 6. Check the output of the wind vane 1. If OK then 7. Check the functionality of the PTAI 216 module 8. Replace the worned parts if required 9. Start the turbine and be happy

Mech_WindVane2_DefectWarn



♦ Root Cause:

Problem with the wind direction which is measured by Wind Vane sensor 2

♦ Reason:

We will get the Alarm only if there is no change in the measured wind direction



devices like multi meter 3. Check the mechanical moment of the wind vane 2 / wind direction sensor. If OK

then 4. Check for the loose connection at the connectors as per the circuit 5. Check the operating supply (24V DC) of the wind vane 2, if OK then 6. Check the output of the wind vane 2. If OK then 7. Check the functionality of the PTAI 216 module 8. Replace the worned parts if required 9. Start the turbine and be happy

Mech_WindSpeed1_DefectWarn



♦ Root Cause:

Problem with the wind speed which is measured by anemometer 1

♦ Reason:

We will get the Alarm only if there is no change in the measured wind speed



devices like multi meter 3. Check the mechanical moment of the wind speed 1 / wind speed sensor. If OK

then 4. Check for the loose connection at the connectors as per the circuit 5. Check the operating supply (24V DC) of the wind speed 1, if OK then 6. Check the output of the wind speed 1. If OK then 7. Check the functionality of the PTAI 216 module 8. Replace the worned parts if required 9. Start the turbine and be happy

Mech_YawBrake_NotReleased




♦ Reason:

We should get the signal DI_FB_YawBrake high when DO_ YawCW / DO_ YawCW is high



devices like multi meter 3. Initially check for the loose connection from DIO module to yaw brake sensor if

found OK then 4. Check the gap setting of the yaw brake sensor if OK then 5. Check whether the sensor senses properly by manual metal object movement 6. Replace the worned parts if required 7. Start the turbine and be happy

Elec_FB_ThyristorBypass_ErrStop




♦ Reason: We should get the signal DI_FB_ThyristorBypass high when DO_ ThyristorBypass is high. (Or) We should not get the signal DI_FB_ThyristorBypass unless DO_ ThyristorBypass is low.



devices like multi meter 3. After keenly observing the logs determine whether the error occurs

During Free Wheeling to Production mode

4. Initially check for the loose connection from DIO module to Bypass Contactor if found OK then

5. Check the functionality PLC relay, Bypass contactor and Auxiliary contactor 6. Replace the worned parts if required 7. Start the turbine and be happy

During Running to Free Wheeling mode / Error mode

8. Check the physical status of the Bypass contactor (It should be in open condition) if found OK then

9. Check the functionality PLC relay(It’s contact point should be open) 10. Replace the worned parts if required 11. Start the turbine and be happy

Elec_CapacitorFeedBack_ErrStop


♦ Place of the problem: Problem is related to the Power Panel


♦ Reason: We should get the signal DI_FB_Capacitor high when any one of the DO_Compensation is high



devices like multi meter 3. Initially check for the loose connection from DIO module to Capacitor contactors

if found OK then 4. Check the functionality of the PLC relays and capacitor contactors if OK then 5. Check the NO contact of the capacitors contactors 6. Replace the worned parts if required 7. Start the turbine and be happy

Elec_Voltage Asymmetry


♦ Place of the problem: Problem is related to the MFR 1371 (Multi Functional Relay)

♦ Root Cause:


♦ Reason:

Missing of the 24V DC from the MFR1371 to DIO 264 module



devices like multi meter 3. Check the 690V AC at the MFR 1371 unit as per the circuit. If OK then 4. Check the 24V DC output from the MFR 1371 5. Check the 24V DC at the particular input of the DIO264 module 6. Here you should get 24V DC if not then replace worned parts if required 7. Start the turbine and be happy

Elec_CutintoG1_Timeout Stop


♦ Place of the problem:

Problem is related to the Power Panel

♦ Root Cause: We will get this alarm only if the grid synchronization is not completed successfully

♦ Reason:

If there is any problem with the synchronization of the generator with the grid, then we will have this error



like multi meter

If it happens in running turbine:

3. Check the digital output (24V DC – Soft starter Enable signal) from DIO 264 to IXYS soft starter

4. Check the analog output signal from AIO 288 to IXYS soft starter 5. Check the FB synchronization OK signal from IXYS to the DIO 264. If OK then 6. Check for the proper function of IXYS soft starter. If OK then 7. Check for the resistance value of the thyristors and the wirings as per circuit, if OK

then 8. Check for the proper function of power contactors (Big G & Bypass) 9. Check for the generator winding values 10. Replace the worned item if required

If it happens in new turbine: 11. Check the phase sequence of the incoming 690V AC power supply as well as the

phase sequence of the G1 power cables 12. Check the digital output (24V DC – Soft starter Enable signal) from DIO 264 to IXYS

soft starter 13. Check the analog output signal from AIO 288 to IXYS soft starter 14. Check the FB synchronization OK signal from IXYS to the DIO 264. If OK then 15. Check for the proper function of IXYS soft starter. If OK then 16. Check for the resistance value of the thyristors, if OK then 17. Check for the proper function of power contactors (Big G & Bypass) 18. Check for the generator winding values 19. Replace the worned item if required and start the turbine and also be happy

Elec_DifferentialProtection_OpenStop


♦ Place of the problem: Problem is related to the Top Panel and Generator


♦ Reason: We will get the alarm when DI_DifferentialProtection signal is high



devices like multi meter 3. Check the physical condition of the power cables if found OK then 4. Check the resistance value of the Generator CT and its physical fixture 5. Check for the loose connection from Generator CT to DPR if found OK then 6. Check for the DPR settings as per standard 7. Check the functionality of the DPR 8. Replace the worned parts if required 9. Start the turbine and be happy

Elec_TestAccuPitch_TimeOutStop


♦ Place of the problem: Problem is related to the hub panel

♦ Reason:

During the start up of turbine, testing the Battery voltage of all battery banks through safety speed test is one of the tests conducted through program. If the turbine is failed to complete the test in limited time period we will get this alarm



devices like multi meter 3. Make the hub lock and confirm that it has been made properly 4. Check the safety speed loop particularly in voltage surveillance circuit if found ok

then 5. Check the output of the battery charger unit (290V DC) in the nacelle control

panel. If it is OK then, 6. Switch OFF the 2F2 MCB which supplies 290V DC to hub panel 7. Check the battery voltage in the corresponding terminal block as per the circuit.

Multi meter should read 290V DC approximately, if not then check the voltage of the individual battery cells and it should show 12V approx. If not then replace the particular battery bank.

8. After replacement of the battery bank, switch ON all the MCB’s and take the safety speed.

9. If you found OK then start the turbine and be happy.

Elec_TestAnemometer_TimeOutStop



Problem is related to the bottom panel, nacelle and control panel

♦ Root Cause: Alarm is called only if the measured generator rpm is not reasonable with the wind speed

♦ Reason:

We will get this alarm if the generator rpm is not plausible with the wind speed at fixed pitch angle



devices like multi meter

There are 3 possibilities for this error: I. Pitch Angle:

If there is any error, after resetting the turbine all 3 blades should move to 0 degree. If it not happens check the safety speed signal loop of the frequency converter. It should be high during normal condition (No error). If the safety speed signal is low, then check the complete loop of the safety speed signal as per the circuit.

II. Anemometer: 1. Check the mechanical moment of the anemometer / wind speed sensor. If OK

then 2. Check the operating supply 24V DC of the anemometer, if OK then 3. Check the voltage output of the anemometer. If OK then 4. Check the functionality of the PTAI 216 module 5. Replace the worned parts if required

III. Generator RPM: 1. Check the gap setting of the generator speed sensor, if OK then 2. Check the functionality of generator speed sensor by moving the metal object in


Elec_FB_GeneratorFan_Err




♦ Reason:

We should get the signal DI_FB_GeneratorFan high when DO_ GeneratorFan is high



devices like multi meter 3. Initially check for the loose connection from DIO module to Fan motor if found

OK then 4. Check the input supply(690V AC) for the MPCB and its NO contact for feedback if

OK then 5. Check the functionality of the PLC relay as well as contactor and its NO contact if

found OK 6. Check the motor winding values as per standard 7. Replace the worned parts if required 8. Start the turbine and be happy

Elec_FB_NacelleFan_ErrWarn




♦ Reason:

We should get the signal DI_FB_NacelleFan high when DO_ NacelleFan is high



devices like multi meter 3. Initially check for the loose connection from DIO module to Fan motor if found




Elec_FrequencyLow_Stop


♦ Place of the problem: Problem is related to the Grid Supply / MFR 1371 (Multi Functional Relay)

♦ Root Cause: Alarm is called if the grid frequency is abnormal

♦ Reason: If the measured frequency is lesser than the low stop parameter of AI_Intern_Frequency_Grid (45 Hz)



devices like multi meter 3. If this error occurs during grid failure then it is normal (No trouble shooting

required) 4. If this error occurs without grid failure then 5. Check the 690V AC at the MFR 1371 unit as per the circuit 6. Replace the worned parts if required (MPCB / HRC Fuses) 7. Start the turbine and be happy

Elec_FrequencyHigh_Stop



♦ Root Cause: Alarm is called if the grid frequency is abnormal

♦ Reason: If the measured frequency is greater than the high stop parameter of AI_Intern_Frequency_Grid (55 Hz)




required) 4. If this error occurs without grid failure then 5. Check the 690V AC at the MFR 1371 unit as per the circuit 6. Replace the worned parts if required (MPCB / HRC Fuses) 7. Start the turbine and be happy

Elec_FB_Generator_ErrStop




♦ Reason: We should get the signal DI_FB_Generator1 high when DO_ Generator is high. (or) We should not get the signal DI_FB_ Generator1 unless DO_ Generator is low.



devices like multi meter 3. After keenly observing the logs determine whether the error occurs

During Free Wheeling to Production mode

4. Initially check for the loose connection from DIO module to Big G Contactor if found OK then

5. Check the functionality PLC relay, Big G contactor and Auxiliary contactor 6. Replace the worned parts if required 7. Start the turbine and be happy

During Running to Free Wheeling mode / Error mode

8. Check the physical status of the Big G contactor (It should be in open condition) if found OK then

9. Check the functionality PLC relay(It’s contact point should be open) 10. Replace the worned parts if required 11. Start the turbine and be happy

Elec_GenBrushesWornOut




♦ Reason:

We will get the alarm when DI_ GeneratorBrushesWornOut is low



devices like multi meter 3. Check whether the generator brushes are really worned out or not. 4. If yes, replace it with new one. 5. If No, then check the NO contact of generator brushes worn out sensor 6. Check for the loose connection from DIO module to generator brushes worn out

sensor 7. Replace the worned parts if required 8. Start the turbine and be happy

Elec_FB_GearOilCooler_Stop




♦ Reason:

We should get the signal DI_FB_GearOilCooler high when DO_ GearOil_Cooler is high



devices like multi meter 3. Initially check for the loose connection from DIO module to Gear oil cooler motor

if found OK then 4. Check the input supply(690V AC) for the MPCB and its NO contact for feedback if



Elec_LightningProtection_warn




♦ Reason:

We will get the alarm when DI_LightningProtection is low



devices like multi meter 3. Check for the loose connection from DIO module to the DHEN’port (Lightning

arrester Guards) 4. Check whether DHEN’port has failed to function 5. Check the 24V DC from the NO contact of the DHEN’port to DIO module 6. Replace the worned parts if required 7. Start the turbine and be happy

Elec_ACBOff_Stop




♦ Reason: Normally this signal DI_ACB should be high when the ACB is ON



devices like multi meter 3. Check the Physical status of ACB (ON / OFF) 4. If it is ON then check the feedback circuit from ACB to DIO 264 5. If it is OFF then we have find the reason for which ACB is tripped 6. The reason for the ACB tripping may be one of the following

→ Earth fault → Over current → Short circuit → Differential Protection Relay may be energized → Emergency stop push button may be pressed → Check ACB settings → Internal problem in ACB

7. Start the turbine and be happy

Elec_FB_Aviation_Light




♦ Reason:

We should get the signal DI_FB_Aviation_Light is low



devices like multi meter 3. Initially check for the loose connection from DIO module to Aviation supply unit if

found OK then 4. Replace the worned parts if required 5. Start the turbine and be happy

Elec_PowerConsumptionStop


♦ Place of the problem: Problem is related to the Power Panel, Nacelle and Hub

♦ Root Cause: Alarm is called if there is abnormal consumption of power

♦ Reason: If the measured value is greater than the low stop parameter AI_intern_ActivePower (-100kW)



devices like multi meter 3. Check whether the error occurred in

Running Turbine

4. Compare the pitch angle of all 3 blades and it should be same during running by keenly observing the logs. If it is found abnormal most probably it will be the Slip ring problem (Check the Hub supply completely) otherwise

5. Check for the loose connection in CT wiring as in circuit up to MFR 1371 unit 6. Replace the worned parts if required

New Turbine (During Commissioning)

7. Check for the proper CT wiring as per the circuit 8. Check for the CT direction as per the Current flow 9. Compare the pitch angle of all 3 blades and it should be same during running by

keenly observing the logs. If it is found abnormal most probably it will be the Slip ring problem (Check the Hub supply completely)

10. Check for the loose connection in CT wiring as in circuit up to MFR 1371 unit 11. Replace the worned parts if required 12. Start the turbine and be happy

Elec_PowerHigh_Stop



♦ Root Cause: Alarm is called if there is abnormal power production

♦ Reason: If the measured value is greater than the high stop parameter AI_intern_ActivePower (2400kW)



devices like multi meter 3. Check the pitch angle calibration of all three Blades 4. Check for the loose connection in CT wiring as in circuit up to MFR 1371 unit 5. Replace the worned parts if required 6. Start the turbine and be happy

Elec_SafetyChainStop


♦ Place of the problem: Problem is related to the Bottom and Nacelle

♦ Root Cause: Alarm is called if the DI_SafetyChain_Activated is low

♦ Reason: Missing of the 24V DC from the Safety chain contactor to DIO 264 module



devices like multi meter 3. By keenly observing the logs confirm whether this error occurred alone or with

some other error 4. If it comes alone then we have to check the 24V DC from the Safety chain

contactor to the DIO 264 module 5. If it comes with any of the following reasons just troubleshoot those errors alone

to solve the problem → Emergency stop in both bottom and top panel → Shake sensor or vibration sensor → Twist stop sensor → ACB (Air Circuit Breaker) → MPCB 8Q2 Main control supply

6. Start the turbine and be happy

Elec_SoftStarter_ErrStop




♦ Reason: During synchronization if we get DI_SoftStarter signal high then we will get this error



like multi meter 3. Check the digital output (24V DC – Soft starter Enable signal) from DIO 264 to IXYS

soft starter if found OK then 4. Check the analog output signal from AIO 288 to IXYS soft starter if found OK then 5. Check for the input supply and proper function of IXYS soft starter. If OK then 6. Check for the resistance value of the thyristors and the wirings as per circuit 7. Replace the worned item if required 8. Start the turbine and be happy

Elec_UPS_LowWarn




♦ Reason: We will get the alarm when DI_UPSLow signal is low



devices like multi meter 3. If this error occurs after a long grid failure no troubleshooting required 4. If this error occurs for a long period after resuming grid then we have to check

the battery condition of the UPS if found OK then 5. Check for the loose connection from UPS to DIO 264 module 6. Replace the worned parts if required 7. Start the turbine and be happy

Elec_VectorSurge_Stop


♦ Place of the problem: Problem is related to the Grid supply / MFR 1371 (Multi Functional Relay)


♦ Reason: Missing of the 24V DC from the MFR1371 to DIO 264 module



devices like multi meter 3. Check the 690V AC at the MFR 1371 unit as per the circuit. If OK then 4. Check the 24V DC output from the MFR 1371 5. Check the 24V DC at the particular input of the DIO264 module 6. Here you should get 24V DC if not then replace worned parts if required 7. Start the turbine and be happy

Elec_VibControllerErr_stop



♦ Root Cause:


♦ Reason:

Missing of the 24V DC from the PCH1026 to DIO 280 module



like multi meter 3. Check the 24V DC output from the PCH 1026 digital structural vibration monitor.

Here you should get 24V DC if not then replace the PCH 1026 monitor. 4. Start the turbine and be happy

Elec_YawSensor_ErrStop




♦ Reason:

We should get the signal DI_FB_YawSensor high when DO_ YawCW / DO_ YawCW is high



devices like multi meter 3. Initially check for the loose connection from DIO module to yaw sensor if found

OK then 4. Check the gap setting of the yaw sensor if OK then 5. Check whether the sensor senses properly by manual metal object movement 6. Replace the worned parts if required 7. Start the turbine and be happy

Pitch_Battery Surveillance 1


♦ Place of the problem: Problem is related to the hub

♦ Root Cause:

Alarm is called if the digital input of the frequency converter 1 is low DIi_Pit1_Battery Surveillance

♦ Reason: Missing of the 24V DC from the battery surveillance sense communication of blade 1



devices like multi meter 3. Make the hub lock and confirm that it has been made properly 4. Check the 290V DC at the input of the Battery surveillance sense communication.

If ok then 5. Check the operating supply (24V DC) of the battery surveillance sense

communication of the blade 1, if OK then 6. Check the 24V DC at the NO contact of the battery surveillance. If OK then 7. Check the 24V DC at the particular input of the frequency converter 8. Replace the worned parts if required and reset the turbine and take the safety

speed 9. If you found OK then start the turbine and be happy




♦ Root Cause:












♦ Root Cause:









Temp_GearBox_HSS_DE_HighWarn



♦ Root Cause:

If there is any abnormal temperature rise in the Gearbox High speed shaft section in the driven end

♦ Reason:

We will get the Alarm only if measured value is greater than maximum warn level parameter Temp_GearBox_HSS_DE (90 deg)






gear box HSS section in the driven end 7. Replace the worned parts if any 8. Start the turbine and be happy

Elec_FB_YawCCW_ErrWarn




♦ Reason:

We should get the signal DI_FB_YawCCW high when DO_ YawCCW is high



devices like multi meter 3. Initially check for the loose connection from DIO module to all yaw motors if

found OK then 4. Check the input supply(690V AC) for the MPCB and its NO contact for feedback if



Elec_FB_YawCW_ErrWarn




♦ Reason:

We should get the signal DI_FB_YawCW high when DO_ YawCW is high



devices like multi meter 3. Initially check for the loose connection from DIO module to all yaw motors if




Elec_YawDirectionStop



♦ Root Cause: Alarm is called if the wind direction changes suddenly

♦ Reason:

We will get the alarm when the measured value is greater than the high stop parameter AI_intern_WindDirection (+35 degree / -35 degree)



devices like multi meter 3. If this alarm occurs, turbine will move to the position of wind direction

automatically. If turbine reaches the position, it will start to run automatically. 4. If this not happens then check the fixture of both the wind vane sensors 5. After that start the turbine and be happy

Elec_TestEndSwitch_TimeOutStop



♦ Root Cause:

Alarm is called if the digital inputs of the frequency converters are low

♦ Reason: During start up of the turbine, test limit switch is one of the tests conducted through program. During this test if 90 degree limit switch failed to touch at physical 90 degree



devices like multi meter 3. Make the hub lock and confirm that it has been made properly 4. Re-calibrate the blade and re-do the switch setting of the 90 degree switch if it is

OK then 5. Check the particular input loop from position encoder to all the frequency

converters 6. Replace the worned parts if required and reset the turbine and take the safety





♦ Root Cause:


♦ Reason:








Mech_CableAutoUnwind



♦ Root Cause: Alarm is called if the turbine starts to unwind the cable to release the twist

♦ Reason:

We will get the alarm when the measured value is greater than the high warn parameter AI_intern_Nacelle Drill (+900 degree / -900 degree)



devices like multi meter 3. If this alarm occurs, turbine will move either in CW / CCW direction depending

upon the direction of twist to release the cable twist during low wind time. If it completes the untwisting then the turbine will start automatically.

4. No troubleshooting required for this alarm and be happy

Temp_Outdoor_HighStop



♦ Root Cause:

If there is any abnormal temperature rise in the Outdoor

♦ Reason: We will get the Alarm only if measured value is greater than maximum stop level parameter Temp_Outdoor (60 deg)





then 5. Check for the proper functionality of the particular PTAI pin if found ok then 6. Replace the worned parts if any 7. Start the turbine and be happy

Temp_Outdoor_LowStop



♦ Root Cause:

If there is any temperature decrease below the standard level of the Outdoor

♦ Reason: We will get the Alarm only if measured value is less than minimum stop level parameter Temp_Outdoor (-10 deg)






WindAvarage_HighStop



Problem is related to the nacelle

♦ Root Cause: This alarm is called when the measured value is greater than the high warn level

♦ Reason:

We will get the Alarm when measured value is above AI_intern_WindSpeed (24 m/s)


1. This error is normally occurs due to high wind speed so it doesn’t require any troubleshooting

2. The turbine will start automatically if the measured wind speed is below the parameter and be happy

WindPeak_HighStop



♦ Root Cause:

This alarm is called when the measured value is greater than the high stop level

♦ Reason:

We will get the Alarm when measured value is above AI_intern_WindSpeed (25 m/s)


1. This error is normally occurs due to high wind speed so it doesn’t require any troubleshooting

2. The turbine will start automatically if the measured wind speed is below the parameter and be happy

PitchAccu1_Voltage_Low Stop



♦ Root Cause:

Problem with the battery voltage of blade 1

♦ Reason:

We will get the Alarm only if AI_Intern_PitchAccu_V1 value is lesser than the specified parameter (220V)



like multi meter 3. Check the output of the battery charger unit (290V DC) in the nacelle control panel.

If it is OK then, 4. Switch OFF the 2F2 MCB which supplies 290V DC to hub panel 5. Make the hub lock and confirm that it has been made properly 6. Check the battery voltage in the corresponding terminal block as per the circuit. Multi

meter should read 290V DC approximately, if not then check the voltage of the individual battery cells and it should show 12V approx. If not then replace the particular battery bank.

7. After replacement of the battery bank, switch ON all the MCB’s and take the safety speed. If you found OK then start the turbine and be happy.

PitchAccu1_Voltage_Low warn



♦ Root Cause:


♦ Reason:




devices like multi meter 3. Check the output of the battery charger unit (290V DC) in the nacelle control

panel. If it is OK then, 4. Switch OFF the 2F2 MCB which supplies 290V DC to hub panel 5. Make the hub lock and confirm that it has been made properly 6. Check the battery voltage in the corresponding terminal block as per the circuit.

Multi meter should read 290V DC approximately, if not then check the voltage of the individual battery cells and it should show 12V approx. If not then replace the particular battery bank.

7. After replacement of the battery bank, switch ON all the MCB’s and take the safety speed. If you found OK then start the turbine and be happy




♦ Root Cause:


♦ Reason:











♦ Root Cause:


♦ Reason:






Multi meter should read 290V DC approximately, if not then check the voltage of the individual battery cells and it should show 12V approx. If not then replace the particular battery bank





♦ Root Cause:


♦ Reason:











♦ Root Cause:


♦ Reason: We will get the Alarm only if AI_Intern_PitchAccu_V3 value is lesser than the specified parameter (230V)





Multi meter should read 290V DC approximately, if not then check the voltage of the individual battery cells and it should show 12V approx. If not then replace the particular battery bank


Pitch_Brake1_NotReleased



♦ Root Cause:

Alarm is called if the digital input of the frequency converter 1 is low DIi_FB_Pitch Brake 1

♦ Reason: Missing of the 24V DC from the Pitch brake at frequency converter



devices like multi meter 3. Make the hub lock and confirm that it has been made properly 4. Check the operation of the pitch brake by pressing the corresponding pitch brake

contactor. If not OK then 5. Check the battery voltage in the corresponding terminal block as per the circuit.

Multi meter should read 290V DC approximately, if OK then 6. Check the condition of the diode, if OK then 7. Check the resistance value of the pitch brake coil, if OK then 8. Check the NO / NC contact of the pitch brake which is supplying FB signal to the

frequency converter 1. If OK then 9. Check the particular input of the frequency converter. 10. Replace the worned parts if required and reset the turbine and take the safety





♦ Root Cause:













♦ Root Cause:










Pitch_FreqConvPitch1_ErrStop



♦ Root Cause:

Alarm will be detected by the frequency converter 1

♦ Reason: Missing of the signals at the frequency converter 1



devices like multi meter 3. Make the hub lock and confirm that it has been made properly 4. Initially check for any abnormalities inside the hub visually also check the

tightness of the circuit connections inside the hub panel if found ok then 5. Completely check all the incoming supply to the frequency converter 1 if found

ok then 6. Check the cable continuity between the frequency converter and pitch motor if

found ok then 7. Check the ohmic value of the pitch motor temperature sensor 8. Check the functionality of the resolver including the cable connections 9. Check all the inputs of the frequency converter as per the circuit 10. Check for the battery leakage in all the battery banks 11. Also check for the proper alignment of slip ring brushes including CAN

connections 12. If all above check points are found ok then replace the frequency converter 13. Take the safety speed if you found ok then 14. Start the turbine and be happy




♦ Root Cause:













♦ Root Cause:










Pitch_LubricationStop


♦ Place of the problem: Problem is related to the Turbine

♦ Root Cause:

This alarm is called when there is no break down for last 24hrs


1. This error is normally occurs due to continuous running of turbine 2. This alarm is basically for Pitch lubrication so it will occur once in every 24hrs

without any breakdown in the turbine 3. After lubricating the pitch the turbine will start automatically

Pitch_WatchdogCSS



♦ Root Cause:

This alarm is called when there is run time error in CSS tasks


1. Manually save the data from the CF card 2. Replace the M1 controller with new one 3. Copy the saved data to the new M1 controller 4. Start the turbine and be happy

Elec_MFR_DFDT


♦ Place of the problem: Problem is related to the bottom panel and particularly for MFR 1371 (Multi Functional Relay) unit

♦ Root Cause:


♦ Reason:




like multi meter 3. Check the fluctuation in grid frequency. If there is no fluctuation then 4. Check the 24V DC output from the MFR 1371 5. Here you should get 24V DC if not then replace the MFR 1371 grid control monitor 6. Start the turbine and be happy

Pitch_AccuChargerStop


♦ Place of the problem: Problem is related to the control panel


♦ Reason:

We will get the alarm when signal DI_PitchAccuCharger_OK is high




panel. It should be minimum 280V DC under load condition.

If the voltage is not OK then

4. Wait for 15 to 10 minutes for charging of the batteries. If there is no improvement in voltage then

5. Switch OFF the 2F2 MCB which supplies 290V DC to hub panel 6. Make the hub lock and confirm that it has been made properly 7. Check the battery voltage of all battery banks in the corresponding terminal

block as per the circuit. Multi meter should read 290V DC approximately, if not then check the voltage of the individual battery cells and it should show 12V approx. If not then replace the particular battery bank.


If the voltage is OK then

9. Check the NO contact of the battery charger and the functionality of the DIO module for the particular input

10. Replace the worned parts if required 11. After replacement, switch ON all the MCB’s and take the safety speed. If you

found OK then start the turbine and be happy

Elec_I1_HighStop

Index Brake Program Yaw Program Reset Level Set Delay (ms) 145 4 0 3 0


♦ Root Cause: Alarm is called if there is abnormal Current in R Phase

♦ Reason: If the measured value is greater than the high stop parameter AI_intern_I1 (2500 A)




Elec_I2_HighStop



♦ Root Cause: Alarm is called if there is abnormal Current in Y Phase





Elec_I3_HighStop



♦ Root Cause: Alarm is called if there is abnormal Current in B Phase





Mech_NacelleDrill_HighStop



♦ Root Cause: Alarm is called if there is abnormal twist in cable

♦ Reason:

We will get the alarm when the measured value is greater than the low & high stop parameter AI_intern_Nacelle Drill (+925 degree / -925 degree)



devices like multi meter 3. After keenly observing the logs, first we have to decide for which direction we

have to do the manual yawing to reduce the cable twist to 0 degree 4. Then start the yawing and bring the cable twist to 0 degree 5. After this start the turbine and be happy

Elec_ReactivePowerHigh_Stop


♦ Place of the problem: Problem is related to the Power Panel

♦ Root Cause: Alarm is called if there is abnormal consumption of reactive power

♦ Reason: If the measured value is greater than the high stop parameter AI_intern_ReactivePower (200 kVArh)



devices like multi meter

This error can happen during

Cut in time

3. After successful grid synchronization turbine must go to the production mode. If this doesn’t happen then there will be more reactive power consumption

4. In this condition we have to completely check the soft starter loop as per the circuit Running time

5. The possibility for this error during running time very less 6. If it occurs then check the proper function of DIO module, PLC relays and

capacitor contactors 7. Replace the worned parts if required 8. Start the turbine and be happy

Mech_Generator_OverSpeedStop



♦ Root Cause: Alarm is called if the measured value is greater than high warn parameter

♦ Reason:

We will get the alarm when measured value is greater than AI_intern_SpeedGenerator (1700 rpm)



devices like multi meter 3. After keenly observing the logs find whether generator rpm increases during

Cutin Time


5. Also check the gap setting for the Generator speed sensor

Running Time

6. Check the gap setting for the Generator speed sensor 7. Check whether the pitch angle of all three blades are same using logs 8. Replace the worned parts if required 9. Start the turbine and keenly observe for corresponding rpm value if found OK be

happy

Temp_CapPanel_LowStop



♦ Root Cause:

If there is any temperature decrease below the standard level in the Capacitor Panel

♦ Reason: We will get the Alarm only if measured value is less than minimum stop level parameter Temp_BottomCapSection (-10 deg)





then 5. Check for the proper functionality of the particular AIO 288 pin if found ok then 6. Check for the function of Panel heater 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_G1L1_LowStop



♦ Root Cause:

If there is any temperature decrease below the standard level in the Generator Winding (L1)

♦ Reason:

We will get the Alarm only if measured value is less than minimum stop level parameter Temp_G1L1 (-10 deg)





then 5. Check for the proper functionality of the particular PTAI pin if found ok then 6. Check for the function of generator heater 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_G1L1_LowWarn



♦ Root Cause:


♦ Reason:

We will get the Alarm only if measured value is less than minimum warn level parameter Temp_G1L1 (0 deg)






Temp_G1L2_LowStop



♦ Root Cause:


♦ Reason:







Temp_G1L2_LowWarn



♦ Root Cause:


♦ Reason:







Temp_G1L3_LowStop



♦ Root Cause:


♦ Reason:







Temp_G1L3_LowWarn



♦ Root Cause:


♦ Reason:







Temp_CabinetTop_LowStop



♦ Root Cause:

If there is any temperature decrease below the standard level in the Top panel

♦ Reason: We will get the Alarm only if measured value is less than minimum stop level parameter Temp_CabinetTopBox (-10 deg)





then 5. Check for the proper functionality of the particular AIO 288 pin if found ok then 6. Check for the function of Panel heater 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_CabinetTop_HighStop



♦ Root Cause:

If there is any abnormal temperature rise in the Top panel

♦ Reason: We will get the Alarm only if measured value is greater than maximum stop level parameter Temp_CabinetTopBox (60 deg)





then 5. Check for the proper functionality of the particular AIO 288 pin if found ok then 6. Check for the proper function of the cooling fans 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_Nacelle_LowStop



♦ Root Cause:

If there is any temperature decrease below the standard level in the Nacelle

♦ Reason: We will get the Alarm only if measured value is less than minimum stop level parameter Temp_Nacelle (-10 deg)






WireBreak_Speed_RotFR



♦ Root Cause: Alarm is called when there is a wire break / FR1 monitor malfunction

♦ Reason: We will get the alarm when there is open circuit



devices like multi meter 3. Check the functionality of FR1 monitor output (4-20mA) 4. Also check the functionality of AIO288 module (for the corresponding input) 5. Check for the wire break between FR1 monitor to AIO288 module 6. Replace the worned parts if required 7. Start the turbine and keenly observe for corresponding rpm value if found OK be

happy

WireBreak_WindSpeed1



♦ Root Cause: Alarm is called when there is a wire break

♦ Reason: We will get the alarm when there is an open circuit



devices like multi meter 3. Check the functionality of Anemometer1 output (4-20mA) 4. Also check the functionality of PTAI module (for the corresponding input) 5. Check for the wire break between Anemometer1 to PTAI module 6. Replace the worned parts if required 7. Start the turbine and keenly observe for WindSpeed1 value if found OK be happy

WireBreak_WindSpeed2







devices like multi meter 3. Check the functionality of Anemometer2 output (4-20mA) 4. Also check the functionality of PTAI module (for the corresponding input) 5. Check for the wire break between Anemometer2 to PTAI module 6. Replace the worned parts if required 7. Start the turbine and keenly observe for WindSpeed2 value if found OK be happy

WireBreak_WindVane1







devices like multi meter 3. Check the functionality of Windvane1 output (4-20mA) 4. Also check the functionality of PTAI module (for the corresponding input) 5. Check for the wire break between Windvane1 to PTAI module 6. Replace the worned parts if required 7. Start the turbine and keenly observe for WindDirection1 value if found OK be

happy

WireBreak_WindVane2







devices like multi meter 3. Check the functionality of Windvane2 output (4-20mA) 4. Also check the functionality of PTAI module (for the corresponding input) 5. Check for the wire break between Windvane2 to PTAI module 6. Replace the worned parts if required 7. Start the turbine and keenly observe for WindDirection2 value if found OK be

happy

WireBreak_GearBox_HSS_DE







devices like multi meter 3. Check the resistance value of the temperature sensor 4. Also check the functionality of AIO288 module (for the corresponding input) 5. Check for the wire break between sensor to AIO288 module 6. Replace the worned parts if required 7. Start the turbine and keenly observe for temperature value if found OK be happy

WireBreak_G1L1







devices like multi meter 3. Check the resistance value of the temperature sensor 4. Also check the functionality of PTAI module (for the corresponding input) 5. Check for the wire break between sensor to PTAI module 6. Replace the worned parts if required 7. Start the turbine and keenly observe for temperature value if found OK be happy

WireBreak_G1L2








WireBreak_G1L3








WireBreak_GearBox_HSS_NDE








WireBreak_GearOilSump








WireBreak_GenBearingDE








WireBreak_GenBearingNDE








WireBreak_MainBearing








WireBreak_Temp_GearBox_IMS_DE








WireBreak_Nacelle








WireBreak_Outdoor








Temp_GearBox_IMS_NDE_Warn



♦ Root Cause:

If there is any abnormal temperature rise in the Gearbox intermediate section in the non driven end

♦ Reason:

We will get the Alarm only if measured value is greater than maximum warn level parameter Temp_GearBox_IMS_NDE (98 deg)






gear box intermediate section in the non driven end 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_PowerPanel_HighStop



♦ Root Cause:

If there is any abnormal temperature rise in the Power section

♦ Reason: We will get the Alarm only if measured value is greater than maximum stop level parameter Temp_PowerSection (60 deg)






Temp_PowerPanel_LowStop



♦ Root Cause:

If there is any temperature decrease below standard level in the power section

♦ Reason: We will get the Alarm only if measured value is less than minimum stop level parameter Temp_PowerSection (-10 deg)





then 5. Check for the proper functionality of the particular AIO 288 pin if found ok then 6. Check for the proper function of the Panel heater 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_ControlPanel_HighStop



♦ Root Cause:

If there is any abnormal temperature rise in the Control Section

♦ Reason: We will get the Alarm only if measured value is greater than maximum stop level parameter Temp_ControlSection (60 deg)






Temp_ControlPanel_LowStop



♦ Root Cause:

If there is any temperature decrease below the standard level in the Control Section

♦ Reason: We will get the Alarm only if measured value is less than minimum stop level parameter Temp_ControlSection (-10 deg)





then 5. Check for the proper functionality of the particular AIO 288 pin if found ok then 6. Check for the proper function of the panel heater 7. Replace the worned parts if any 8. Start the turbine and be happy

Elec_VoltageU1_HighStop



♦ Root Cause: Alarm is called if the voltage in R Phase is abnormal

♦ Reason: If the measured voltage is greater than the high stop parameter of AI_Intern_U1 (790 V)




required) 4. If this error occurs without grid failure then we have to 5. Check the incoming voltage from the HT transformer secondary. If the measured

value is above our parameter value then the transformer tapping should be reduced to the rated voltage. If the incoming voltage is normal then

6. Check the 690V AC at the MFR 1371 unit as per the circuit 7. Replace the worned parts if required (MPCB / HRC Fuses) 8. Start the turbine and be happy




♦ Root Cause: Alarm is called if the voltage in Y Phase is abnormal






value is above our parameter value then the transformer tapping should be reduced to the rated voltage. If the incoming voltage is normal then





♦ Root Cause: Alarm is called if the voltage in B Phase is abnormal






value is above our parameter value then the transformer tapping should be reduced to the rated voltage. If the incoming is normal voltage then


Elec_VoltageU1_LowStop



♦ Root Cause: Alarm is called if the voltage in R Phase is abnormal

♦ Reason: If the measured voltage is lesser than the low stop parameter of AI_Intern_U1 (590 V)





value is below our parameter value then the transformer tapping should be increased to the rated voltage. If the incoming voltage is normal then





♦ Root Cause: Alarm is called if the voltage in Y Phase is abnormal











♦ Root Cause: Alarm is called if the voltage in B Phase is abnormal








Temp_GearBox_IMS_DE_LowStop



♦ Root Cause:

If there is any temperature decrease below the standard level in the Gearbox intermediate section in the driven end

♦ Reason:

We will get the Alarm only if measured value is less than minimum stop level parameter Temp_GearBox_IMS_DE (-10 deg)






Pitch_Angle1_SPDifference Stop



Problem is related to hub panel

♦ Root Cause: We will get the alarm when actual angle of the blade 1 is differs from the controller set point (+2 / - 2 deg)



like multi meter 3. Make the hub lock and confirm that it has been made properly 4. Check for the abnormalities inside hub (position encoder fixture, abnormal smelling /

loose connections inside hub panel and pitch pinion fixture), if found OK then, 5. Check for the pitch motor temperature, if it is found over temperature then check the

pitch brake loop as in circuit diagram. 6. Replace the worned parts if required (MCB, relay, contactor, diode, pitch brake or

frequency converter) 7. After replacement check for the proper function of all 3 blades using manual

pitching. 8. If you found OK be happy



♦ Place of the problem: Problem is related to hub panel







frequency converter) 7. After replacement check for the proper function of all 3 blades using manual pitching 8. If you found OK be happy



♦ Place of the problem: Problem is related to hub panel







frequency converter) 7. After replacement check for the proper function of all 3 blades using manual pitching 8. If you found OK be happy

Pitch_SafetyTestActiv


♦ Place of the problem: Problem is related to the Turbine

♦ Root Cause: This alarm is called when once in every week (168 hrs) as per parameter


1. This error is normally occurs to make a self test of the batteries in all battery banks

2. After making the battery test the turbine will automatically start only if there is no battery related errors during battery test

3. If any error occurs troubleshoot those individually as per circuit otherwise the turbine will not start

Temp_MainBearing_LowStop



♦ Root Cause:

If there is any temperature decrease below the standard level in the Main bearing

♦ Reason: We will get the Alarm only if measured value is less than minimum stop level parameter Temp_Hub Bearing (-10 deg)






Temp_GeneratorBearing_NDE_LowStop



♦ Root Cause:

If there is any temperature decrease below the standard level in the Generator bearing in the non driven end

♦ Reason:

We will get the Alarm only if measured value is less than minimum stop level parameter Temp_GeneratorBearing_NDE (-5 deg)






Elec_LightningProtection_Topwarn




♦ Reason:

We will get the alarm when DI_LightningProtection Top is low



devices like multi meter 3. Check for the loose connection from DIO module to the DHEN’port (Lightning

arrester Guards) 4. Check whether DHEN’port has failed to function 5. Check the 24V DC from the NO contact of the DHEN’port to DIO module 6. Replace the worned parts if required 7. Start the turbine and be happy

Elec_ManStopBottom


♦ Root Cause:

This alarm is called when we press the man STOP button in bottom panel


1. We use this facility to work in the turbine under stopped condition if any 2. Turbine will start only when we press the START button in the bottom panel

Pitch_CAN1ComFail



♦ Root Cause:

Failure in the CAN communication with frequency converter 1

♦ Reason: We will get if there is any communication problem between CM202 module and frequency converter 1



devices like multi meter 3. Make the hub lock and confirm that it has been made properly 4. Check for the loose connection in the CAN plug at CM202 module as well as at

the frequency converter 1. If ok then 5. Check the resistance value of the end resistor and it should be 120 ohm, if OK

then 6. Check for the misalignment of the slip ring brushes 7. check the operating supply (24V DC) of the frequency converter 1, if OK then 8. Check the functionality of the CM 202 module 9. Replace the worned parts if required and reset the turbine and take the safety


Pitch_CAN2ComFail



♦ Root Cause:

Failure in the CAN communication with frequency converter 2








Pitch_CAN3ComFail



♦ Root Cause: Failure in the CAN communication with frequency converter 3








FSS_CANFail



♦ Root Cause:

Failure in the CAN communication with SFS Module

♦ Reason: We will get if there is any communication problem between CM202 module and SFS module



devices like multi meter 3. Check for the loose connection in the CAN plug at CM202 module as well as at

the SFS CAN plug. If ok then 4. Check the resistance value of the end resistor and it should be 120 ohm, if OK

then 5. Check the operating supply (24V DC) of the SFS module, if OK then 6. Check the functionality of the CM 202 module 7. Replace the worned parts if required and reset the turbine 8. Start the turbine and be happy

Temp_GeneratorBearing_DE_LowStop



♦ Root Cause:

If there is any temperature decrease below the standard level in the Generator bearing in the driven end

♦ Reason:

We will get the Alarm only if measured value is less than minimum stop level parameter Temp_GeneratorBearing_DE (-5 deg)






Temp_GearBox_HSS_DE_LowStop



♦ Root Cause:

If there is any temperature decrease below the standard level in the Gearbox High speed shaft section in the driven end

♦ Reason:

We will get the Alarm only if measured value is less than minimum stop level parameter Temp_GearBox_HSS_DE (5 deg)






Mech_RotorLockedStop




♦ Reason:

We should get the signal DI_RotorLocked high when there is no rotor lock applied in the turbine



devices like multi meter 3. Normally when we work in hub we will put hub lock so that time we will get this

alarm 4. So while removing hub lock we should get the DI signal high back, if not 5. Check for the loose connection from DIO module to the sensor if found OK then 6. Check the gap setting of the sensor if OK then 7. Check whether the sensor senses properly by manual metal object movement 8. Replace the worned parts if required 9. Start the turbine and be happy

Elec_MFR 1371_ErrStop


♦ Place of the problem: Problem is related to the bottom panel and particularly for MFR 1371 (Multi Functional Relay) unit

♦ Root Cause:

Alarm is called if there is problem in CAN communication

♦ Reason:

Error in communication with CM 202 module



like multi meter 4. Check the operating voltage (24V DC) of the MFR 1371, if OK then 5. Check the CAN communication between MFR 1371 and CM202 module if not then

replace CM202 / MFR 1371 unit 6. Start the turbine and be happy

Wind_Lowwind_NoAzimuth


♦ Root Cause:

This alarm is called when there is low wind less than the turbine start wind


1. No remedial action required as the wind speed increases this alarm will auto reset

Elec_FB_PowerSupplyPitch




♦ Reason: We will get the alarm DI_FB_PowerSupplyPitch is low when DO_PowerSupplyPitch is high



devices like multi meter 3. Check for the loose connection from DIO module to Power supply pitch contactor 4. Check the functionality of DIO module, PLC Relay and the power supply pitch

contactor 5. Check the NO contact of PLC relay and power supply pitch contactor for feed

back 6. Replace the worned parts if required 7. Start the turbine and be happy

Mech_WindSpeed2_DefectWarn



♦ Root Cause:

Problem with the wind speed which is measured by anemometer 2

♦ Reason: We will get the Alarm only if there is no change in the measured wind speed



devices like multi meter 3. Check the mechanical moment of the wind speed 2 / wind speed sensor. If OK

then 4. Check for the loose connection at the connectors as per the circuit 5. Check the operating supply (24V DC) of the wind speed 2, if OK then 6. Check the output of the wind speed 2. If OK then 7. Check the functionality of the PTAI 216 module 8. Replace the worned parts if required 9. Start the turbine and be happy

Mech_RmpObserver_OverSpeedStop




♦ Reason:

We will get the alarm when measured value is greater than AI_intern_SpeedRotFR (19 rpm)



devices like multi meter 3. After keenly observing the logs find whether Rotor_FR rpm increases during

Cutin Time


5. Also check the gap setting for the Rotor_FR speed sensor

Running Time

6. Check the gap setting for the Rotor_FR speed sensor 7. Check whether the pitch angle of all three blades are same using logs 8. Replace the worned parts if required 9. Start the turbine and keenly observe for corresponding rpm value if found OK be

happy

Elec_UPSBattChange




♦ Reason: We will get the alarm when DI_UPS_BatteryChange signal is low



devices like multi meter 3. If this error occurs after resuming grid then we have to check the battery

condition of the UPS if found OK then 4. Check for the loose connection from UPS to DIO 264 module 5. Replace the worned parts if required 6. Start the turbine and be happy

Elec_ManStopTop


♦ Root Cause:

This alarm is called when we press the man STOP button in top panel


1. We use this facility to work in the turbine under stopped condition if any 2. Turbine will start only when we press the START button in the top panel

Pitch_EndSwitch1_LowStop



♦ Root Cause:

Alarm is called if the digital input of the frequency converter 1 is high

♦ Reason: We will get this alarm when DIi_Pit1_EndSwitch is high when the actual angle of the blade 1 is less than 80 degree




OK then 5. Check the particular input loop from position encoder to frequency converter 1 6. Replace the worned parts if required and reset the turbine and take the safety




♦ Place of the problem: ♦

Problem is related to the hub

♦ Root Cause: Alarm is called if the digital input of the frequency converter 2 is high










♦ Root Cause:








Pitch_EndSwitch1_HighStop



♦ Root Cause:

Alarm is called if the digital input of the frequency converter 1 is low

♦ Reason: We will get this alarm when DIi_Pit1_EndSwitch is low when the actual angle of the blade 1 is 90 degree









♦ Root Cause:











♦ Root Cause:








Elec_FB_GearOil_PumpHighLow




♦ Reason:

We should get the signal DI_FB_GearOil_PumpHighLow high when DO_ GearOil_PumpHigh / DO_ GearOil_PumpLow is high



devices like multi meter 3. After keenly observing the log find whether this error occurs for pump high /

pump low 4. Check for the loose connection from DIO module to Gear oil filter motor if found



found OK 7. Check the corresponding motor winding values as per standard 8. Replace the worned parts if required 9. Start the turbine and be happy

WireBreak_CabinetTop








WireBreak_BottomControlSection








WireBreak_BottomCapSection








WireBreak_BottomPowerSection








SE_WatchdogCSF



♦ Root Cause:

This alarm is called when there is an internal error in the controller


1. Manually save the data from the CF card 2. Replace the M1 controller with new one 3. Copy the saved data to the new M1 controller 4. Start the turbine and be happy

Pitch_ExtPowerSupply24VStopp_Conv1



♦ Root Cause:

Alarm is called if the digital input of the frequency converter 1 is low DIi_Pit1_ExternPowerSupply

♦ Reason: Missing of the 24V DC from the DC to DC converter (290V DC / 24V DC) of blade 1



devices like multi meter 3. Make the hub lock and confirm that it has been made properly 4. Check the 290V DC at the input of the DC to DC converter. If ok then 5. Check the 24V DC at the NO contact of the DC to DC converter. If OK then 6. Check the 24V DC at the particular input of the frequency converter 7. Replace the worned parts if required and reset the turbine and take the safety





♦ Root Cause:










♦ Root Cause:







RS_BottomServiceStop


♦ Root Cause:

This alarm is called when we switch on the service stop button in bottom panel


1. We use this facility to work in the turbine under stopped condition if any 2. Turbine will start only when we switch off the service button

Elec_FB_GearBox_Heating




♦ Reason:

We should get the signal DI_FB_GearBox_Heating high when DO_ GearBox_Heating is high



devices like multi meter 3. Initially check for the loose connection from DIO module to Gearbox heater if



found OK 6. Check the resistance value of the heater 7. Replace the worned parts if required 8. Start the turbine and be happy

Pitch_EndSwitch_5GradNeg_Conv1



♦ Root Cause:


♦ Reason: We will get this alarm when DIi_Pit1_LimitSwitch_5Grad is high



devices like multi meter 3. Make the hub lock and confirm that it has been made properly 4. Kindly make a keen analysis for which reason the blade moves to – 5 degree by

using the fast log and event log (It is important to be done before calibration) 5. Re-calibrate the blade and re-do the switch setting of the -5 degree if it is OK

then 6. Check the particular input loop from position encoder to frequency converter 1 7. Replace the worned parts if required and reset the turbine and take the safety





♦ Root Cause:












♦ Root Cause:









RS_Pitch_manuell


♦ Root Cause:

This alarm is called when we press the Pitch Manual button in visualization or by changing the parameter (108 – SwitchmanualPitch) to 1 in WT305


1. We use this facility to pitch three blades individually as per our requirement by using the following parameters

→ 109 - P_PitAlphaMan1 → 110 - P_PitAlphaMan2 → 111 - P_PitAlphaMan3

2. Turbine will start only when we again press the Pitch Manual button or by

changing the parameter (108) back to 0 in WT305

RS_Turbine_manuell


♦ Root Cause:

This alarm is called when we press the Turbine Manual button in visualization


1. We use this facility to make free wheeling test in the turbine as per our requirement by using the following parameters

→ 14 – P_Turb_MinPitAngleManuell → 15 – P_Turb_SpeedGenSPManuell

2. Turbine will start only when we again press the Turbine Manual button

Pitch_Manuell_OverSpeed



♦ Root Cause:

This alarm is called when the generator rpm increases during manual pitching


1. Manual pitching should be done only if the rotor is in locked status 2. Before manual pitching confirm that the rotor is locked properly

Temp_GearBox_HSS_NDE_HighStop



♦ Root Cause:

If there is any abnormal temperature rise in the Gearbox High speed shaft section in the non driven end

♦ Reason:

We will get the Alarm only if measured value is greater than maximum stop level parameter Temp_GearBox_HSS_NDE (95 deg)






gear box HSS section in the non driven end 7. Replace the worned parts if any 8. Start the turbine and be happy

Temp_GearBox_HSS_NDE_LowStop



♦ Root Cause:

If there is any temperature decrease below the standard level in the Gearbox High speed shaft section in the non driven end

♦ Reason:

We will get the Alarm only if measured value is less than minimum stop level parameter Temp_GearBox_HSS_NDE (5 deg)






Temp_GearBox_HSS_NDE_HighWarn



♦ Root Cause:

If there is any abnormal temperature rise in the Gearbox High speed shaft section in the non driven end

♦ Reason:

We will get the Alarm only if measured value is greater than maximum stop warn parameter Temp_GearBox_HSS_NDE (90 deg)






gear box HSS section in the non driven end 7. Replace the worned parts if any 8. Start the turbine and be happy

Elec_Current Asymmetry



Problem is related to the Power Panel, HT line and Generator

♦ Root Cause: We will get this alarm only if we have the current difference between any two phases

♦ Reason:

If the measured current value exceeds the parameter AI_Intern Current Asymmetry (>150A)


1. Using M-Manager, Take the fast log and event log of the particular alarm 2. After keenly observing the logs check whether the alarm comes during running or cut

in time

If it happens during running time a) Check for the proper tightness in power panel, capacitor panel, generator terminal box cable terminations and HT line connections b) Check for the proper function of power contactors (Big G & Bypass) c) Check for the condition of capacitors, fuses and inter connection cables terminations as well as contactors d) Check whether any damage occurred in power cables e) Check the current transformer loop and for loose connections in power panel

If it happens during cut in time

a) Check for the proper function of IXYS soft starter and the thyristors values b) Check for the generator winding values as well as for the tightness c) Check for the proper tightness in power panel, generator terminal box and

HT line d) Check for the proper function of power contactors (Big G) e) Check whether any damage occurred in power cables f) Check the current transformer loop in power panel g) Replace the worned parts if required and reset the turbine h) If you observe OK, be happy

Elec_GearBoxLubricPumpOn



♦ Reason: We will get this alarm only when the filter motor is not in running condition for more than 2 hours


1. This alarm will be auto resetted when the filter motor starts running

Elec_24VSupply_TopFail




♦ Reason:

We will get the alarm when DI_24V_Top is low



devices like multi meter 3. Check the input supply(230V AC) of three Power supply modules if OK then 4. Check the NO contact of all three power supply modules 5. Check for the loose connection from DIO module to Power supply modules 6. Replace the worned parts if required 7. Start the turbine and be happy

Elec_24VSupply_BottomFail




♦ Reason:

We will get the alarm when DI_24V_Bottom is low



devices like multi meter 3. Check the input supply(230V AC) of two Power supply modules if OK then 4. Check the NO contact of all two power supply modules 5. Check for the loose connection from DIO module to Power supply modules 6. Replace the worned parts if required 7. Start the turbine and be happy

Elec_MFR_Fail


♦ Place of the problem: Problem is related to the MFR 1371 (Multi Functional Relay)

♦ Root Cause:


♦ Reason:




devices like multi meter 3. Check the operating voltage (24V DC) of the MFR 1371 unit. If OK then 4. Check the 24V DC output from the MFR 1371 5. Check the 24V DC at the particular input of the DIO264 module 6. Here you should get 24V DC if not then replace worned parts if required 7. Start the turbine and be happy

Mech_RpmFR1_CNT_DiffStop




♦ Reason:

We will get the alarm when measured value is greater than AI_intern_Speed_RpmDiff_FR1_RotCNT (+2 / -2 rpm)



devices like multi meter 3. After keenly observing the logs find whether Rotor_CNT rpm / Rotor_FR1 rpm

jumps 4. After finding check the functionality of the corresponding sensor also check for

the proper gap distance as per the standard 5. Check the functionality of the CNT204 module as well as FR1 monitor 6. Replace the worned parts if required 7. Start the turbine and keenly observe for corresponding rpm value if found OK be

happy

RS_YawCW_manuell


♦ Root Cause:

This alarm is called when we Press the Clockwise button (Yaw control) either in the visualization or in WT305


1. We use this facility to move the turbine manually in clockwise direction as per our requirement if any

2. we can use this facility under running condition of the turbine

RS_YawCCW_manuell


♦ Root Cause:

This alarm is called when we Press the Counter Clockwise button (Yaw control) either in the visualization or in WT305


1. We use this facility to move the turbine manually in counter clockwise direction as per our requirement if any

2. we can use this facility under running condition of the turbine

RS_YawCW_TopBox_manuell


♦ Root Cause:

This alarm is called when we Press the Yaw CW push button in the top panel


1. We use this facility to move the turbine manually in clockwise direction as per our requirement if any

2. The turbine will start only when we reset the alarm

RS_YawCCW_TopBox_manuell


♦ Root Cause:

This alarm is called when we Press the Yaw CCW push button in the top panel


1. We use this facility to move the turbine manually in counter clockwise direction as per our requirement if any


FSS_Fault



♦ Root Cause:

Problem detected by the SFS Module

♦ Reason: We will get if there is any problem in the flexi slip system



devices like multi meter 3. Check the complete loop of flexi slip circuit including the rotor terminals and

resistor box 4. Check for any abnormalities in the SFS panel (Component failure) 5. Check the operating supply (24V DC) of the SFS module, if OK then 6. Replace the worned parts if required and reset the turbine 7. Start the turbine and be happy

RS_StopBrakeButtonTop


♦ Root Cause:

This alarm is called when we Press the Brake push button in top operational box


1. To bring the rotor in standstill condition as per our requirement we use the push button


FB_YawBrake




♦ Reason:

We should get the signal DI_FB_YawBrake high when DO_ YawCW / DO_ YawCW is high



devices like multi meter 3. Initially check for the loose connection from DIO module to yaw brake sensor if

found OK then 4. Check the gap setting of the yaw brake sensor if OK then 5. Check whether the sensor senses properly by manual metal object movement 6. Replace the worned parts if required 7. Start the turbine and be happy

YawLubricationWarn




♦ Reason:

We should get the signal DI_PulseSensorCLYawBearing high when DO_ CLPumpYawBearing is high



devices like multi meter 3. Initially check for the loose connection from DIO module to centralized

lubrication system if found OK then 4. Replace the worned parts if required 5. Start the turbine and be happy

MainBearingLubricationWarn




♦ Reason:

We should get the signal DI_PulseSensorCLMainBearing high when DO_ CLPumpMainBearing is high



devices like multi meter 3. Initially check for the loose connection from DIO module to centralized

lubrication system if found OK then 4. Replace the worned parts if required 5. Start the turbine and be happy

Pitch_EmergencyRun



♦ Root Cause:

Alarm is called if the digital inputs of the frequency converters are low DIi_Pit1EmergencyRun / DIi_Pit2EmergencyRun / DIi_Pit3EmergencyRun

♦ Reason: Missing of the 24V DC in the safety speed loop



devices like multi meter 3. Make the hub lock and confirm that it has been made properly 4. If there is any error, after resetting the turbine all 3 blades should move to 0

degree. If it not happens check the safety speed signal loop of the frequency converter. It should be high during normal condition (No error).

5. If the safety speed signal is low, then check the complete loop of the safety speed signal as per the circuit.

6. If you found OK then start the turbine and be happy

Pitch_SuppyFail


♦ Place of the problem: Problem is related to the Hub

♦ Root Cause:

If there is any problem with the incoming 3phase 230V supply to the hub

♦ Reason: We will get the Alarm only if measured value is greater than AI_intern_PitchSupply (270V DC)



devices like multi meter 3. Make the hub lock and confirm whether it has done properly 4. Check the complete loop for the incoming 3phase 230V supply in the hub 5. Replace the worned parts if required 6. Make the safety speed if you found OK then 7. Start the turbine and be happy

Pitch_FusesBattChargerOFF




♦ Reason:

We will get the alarm when signal DI_FusesBattCharger is low



devices like multi meter 3. Check whether the corresponding fuses were tripped 4. If tripped then we have to find out reason for which it has been tripped. There

may be following possibilities → Battery charger failure → Slip ring → Battery banks → Diodes

5. If not tripped, Check the NO contact of the fuses and the functionality DIO280

module 6. Replace the worned parts if required and take the safety speed 7. If you observed OK, start the turbine and be happy

Rep_Mech_TowerVib_stop



♦ Root Cause:

We will get the alarm only when the Mech_TowerVib_stop came thrice within an hour

♦ Reason:





If you found OK, then 4. Compare the pitch angle of all 3 blades and it should be same. If its OK, then 5. Check the 24V DC output from the PCH 1026 digital structural vibration monitor.

Here you should get 24V DC if not then replace the PCH 1026 monitor. 6. Start the turbine and observe for vibration. 7. If you found OK be happy.

Rep_Mech_DriveTrainVib_stop



♦ Root Cause:

We will get the alarm only when the Mech_DriveTrainVib_stop came thrice within an hour

♦ Reason:

Problem with the abnormal vibration of the Gear box due to misalignment of the nacelle accessories (or) missing of the 24V DC from the PCH1026 to DIO 280 module




If you found OK, then 4. Compare the pitch angle of all 3 blades and it should be same. If its OK, then 5. Check the 24V DC output from the PCH 1026 digital structural vibration monitor.

Here you should get 24V DC if not then replace the PCH 1026 monitor. 6. Start the turbine and observe for vibration 7. If you found OK be happy.

Rep_Pitch_FreqConvPitch1_ErrStop



♦ Root Cause:

Alarm is called if the Pitch_FreqConvPitch1_ErrStop came thrice in an hour












♦ Root Cause:













♦ Root Cause:










Rep_Pitch_EmergencyRun



♦ Root Cause: Alarm is called if the Pitch_Emergency Run error occurs 3 times with in 3600 seconds

♦ Reason: We will get the alarm if the digital inputs of the frequency converters are low DIi_Pit1EmergencyRun / DIi_Pit2EmergencyRun / DIi_Pit3EmergencyRun



devices like multi meter 3. Make the hub lock and confirm that it has been made properly 4. If there is any error, after resetting the turbine all 3 blades should move to 0

degree. If it not happens check the safety speed signal loop of the frequency converter. It should be high during normal condition (No error).

5. If the safety speed signal is low, then check the complete loop of the safety speed signal as per the circuit

6. If you found OK then start the turbine and be happy

Rep_SE_RebootPLC


♦ Place of the problem: Problem is related to the Bottom Panel and Control Panel

♦ Root Cause: Alarm is called if the PLC rebooted 3 times with in 3600 seconds

♦ Reason: Missing of the 24V DC at the NT250 power supply module / synchronization problem of both fast bus modules



devices like multi meter 3. Check the 24V DC at the NT250 power supply module. If OK then 4. Check for the loose connection in all Bachmann modules, if OK then 5. Check the warning for the fast bus synchronization problem in the previous log

book and current log book by using M-Manager, if you found 6. Check the optical cable, jumper setting of the fast bus modules and functionality

of all Bachmann modules 7. Replace the worned parts if required 8. Start the turbine and be happy

Prepared by : P.Vijaya Kumar

Approved by : D.Rajesh DGM (Engg.)

Version : RD.S88.01 Date : 22 / 09 / 2006

Errors and Troubleshooting

Documents