AE8-1385 - CoreSense™ Diagnostics for Copeland …...AE8-1385 R1 Safety Instructions Copeland Scroll compressors with CoreSense Diagnostics technology are manufactured according
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AE8-1385 R1 February 2015
CoreSense™ Diagnostics for Copeland Scroll™ UltraTech™ Air Conditioning Compressors
Module History Download ...................................................... 6 Warranty Information ............................................................. 6
Support .................................................................................. 6
Figures and Tables
Wires Pulled Through Module ................................................ 6
Module Dimensions in Millimeters .......................................... 7
Copeland Scroll™ compressors with CoreSense™ Diagnostics technology are manufactured according to the latest U.S. and European Safety Standards. Particular emphasis has been placed on the user's safety. Safey icons are explained below and safety instructions applicable to the products in this bulletin are grouped on Page 3. These instructions should be retained throughout the lifetime of the compressor. You are strongly advised to follow these safety instructions.
Long run time. Compressor is running for more than 18 hours at full load. (Code1 is disabled in Heat Pump mode.)
Compressor Pressure trip. Compressor runs for 12sec to 15min followed by a compressor trip condition lasting longer than 7min.
Pressure switch cycling. Compressor runs for 12sec to 15min followed by a compressor trip lasting between 35sec to 7min.
Locked rotor. Compressor trips within a compressor run time of 12sec and does not start within 35sec.
Compressor moderate run trip. Compressor runs for 15min to 18hrs followed by a compressor trip lasting longer than 7min.
Open start circuit. Module has detected Y or Y1, and current in the R winding of the compressor and no current in the S winding of the compressor for 2 seconds.
Open run circuit. Module has detected Y or Y1, and current in the S winding of the compressor and no current in the R winding of the compressor for 2 seconds.
N/A N/A
N/A N/A
4x consecutive, Red: Flash 2 10x total
4x consecutive, Red: Flash 3 10 total
10x consecutive Red: Flash 4
4x consecutive, Red: Flash 5 10x total
1 occurrence Red: Flash 6
1 occurrence Red: Flash 7
Code8 Welded Contactor. Module has detected line currents N/A N/A
Yellow Flash 8 in R and S windings, and Y or Y1 is at 0 VAC for 15 seconds.
Code9 Low Voltage. Module has detected a 24 VAC supply N/A N/A
Yellow Flash 9 voltage below 17 VAC +/- 1 VAC for 2 seconds
Code10
Red Flash 10
Over Current Protection. PROT terminal has above a 2A input for more than 40 milliseconds.
Table 2 - CoreSense Diagnostics LED Troubleshooting Information Flash Code number corresponds to the number of LED flashes, followed by a pause and then repeated. TRIP and ALERT LEDs flashing at same time means control circuit voltage is too low for operation (brown-out conditions).
Status Description Troubleshooting Information
Solid Green “RUN” Module has power and operating normally
Supply voltage is present at module terminals
1. Compressor protector is open
• Check for high head pressure
Thermostat demand signal Y is Solid Red “TRIP” present, but the compressor is
not running
• Check compressor supply voltage
2. Outdoor unit power disconnect is open
3. Compressor circuit breaker or fuse(s) is open
4. Broken wire or connector is not making contact
5. High pressure switch open if present in system
6. Compressor contactor has failed open
“ALERT” Flash Codes
1. Low refrigerant charge
2. Evaporator blower is not running
• Check blower relay coil and contacts
• Check blower motor capacitor
• Check blower motor for failure or blockage
• Check evaporator blower wiring and connectors
• Check indoor blower control board
• Check thermostat wiring for open circuit
Long Run Time Yellow “ALERT” Low Refrigerant Charge Flash Code 1 Compressor is running extremely
long run cycles
3. Evaporator coil is frozen
• Check for low suction pressure
• Check for excessively low thermostat setting
• Check evaporator airflow (coil blockages or return air filter)
• Check ductwork or registers for blockage
4. Faulty metering device
• Check TXV bulb installation (size, location and contact)
• Check if TXV/fixed orifice is stuck closed or defective
5. Liquid line restriction (filter drier blocked if present in system)
6. Thermostat is malfunctioning
• Check thermostat sub-base or wiring for short circuit
• Check thermostat installation (location, level)
1. Condenser fan is not running
• Check fan capacitor
• Check fan wiring and connectors
Compressor (Pressure) Trip Yellow “ALERT” High Refrigerant Charge Flash Code 2 Discharge pressure out of limits
or compressor overloaded
• Check fan motor for failure or blockage
2. High head pressure
• Check high pressure switch if present in system
• Check if system is overcharged with refrigerant
• Check for non-condensable in system
3. Condenser coil poor air circulation (dirty, blocked, damaged)
4. Return air duct has substantial leakage
Pressure Switch Cycling
Yellow “ALERT” Compressor is running only 1. Time delay relay or control board defective Flash Code 3 briefly due to pressure switch 2. If high pressure switch present go to Flash Code 2 information
• Check TXV bulb installation (size, location and contact)
• Check if TXV/fixed orifice is stuck closed or defective
3. Condenser coil poor air circulation (dirty, blocked, damaged)
4. Low refrigerant charge
Yellow “ALERT” Welded Contactor 1. Compressor contactor has failed closed Flash Code 8 Compressor always runs 2. Thermostat demand signal not connected to module
Yellow “ALERT” Low Supply Voltage 1. Control Circuit transformer is overloaded Flash Code 9 Voltage below 18V 2. Low line voltage (contact utility if voltage at disconnect is low)
“LOCKOUT” Flash Codes
1. Condenser fan is not running
• Check fan capacitor
• Check fan wiring and connectors
Red “LOCKOUT” Flash Code 2
Yellow Off
Red “LOCKOUT” Flash Code 3 Yellow Off
Compressor (Pressure) Trip Compressor is locked out after 4 consecutive or 10 total compressor (pressure) trip events
Pressure Switch Cycling Compressor is locked out after 4 consecutive or 10 total pressure cycling events
• Check fan motor for failure or blockage
2. High head pressure
• Check high pressure switch if present in system
• Check if system is overcharged with refrigerant
• Check for non-condensable in system
3. Condenser coil poor air circulation (dirty, blocked, damaged)
4. Return air duct has substantial leakage
1. Time delay relay or control board defective
2. If high pressure switch present go to Flash Code 2 information
1. Run capacitor has failed
Red “LOCKOUT” Locked Rotor Flash Code 4 Compressor is locked out after 10 Yellow Off consecutive locked rotor events
2. Low line voltage (contact utility if voltage at disconnect is low
Compressor (Moderate Run) Trip Compressor is locked out after 4 consecutive or 10 total compressor (moderate run) trip events
• Check blower motor for failure or blockage
• Check evaporator blower wiring and connectors
• Check indoor blower control board
• Check thermostat wiring for open circuit
2. Faulty metering device
• Check TXV bulb installation (size, location and contact)
• Check if TXV/fixed orifice is stuck closed or defective
3. Condenser coil poor air circulation (dirty, blocked, damaged)
4. Low refrigerant charge
1. Run capacitor has failed
Red “LOCKOUT” Flash Code 6 Yellow Off
Open Start Circuit Current only in run circuit
2. Open circuit in compressor start wiring or connections
• Check wiring and connectors between supply and the
compressor “S” terminal
3. Compressor start winding is damaged
• Check compressor motor winding resistance
1. Open circuit in compressor run wiring or connections
Red “LOCKOUT” Flash Code 7
Yellow Off
Red “LOCKOUT” Flash Code 10
Open Run Circuit Current only in start circuit
Over Current Protection Current to PROT is greater than 2A mps
• Check wiring and connectors between supply and the
compressor “R” terminal. Confirm proper wire routing per
Figure 1.
2. Compressor run winding is damaged
• Check compressor motor winding resistance
1. Check for contactor shorted to ground
2. Check for mis-wiring to the PROT terminal
The contents of this publication are presented for informational purposes only and they are not to be construed as warranties or guarantees, express or implied, regarding the products or
services described herein or their use or applicability. Emerson Climate Technologies, Inc. reserves the right to modify the designs or specifications of such products at any time without
notice. Emerson Climate Technologies, Inc. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson Climate Technologies, Inc. product remains solely with the purchaser and end-user.