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Compressor Diagnostic Codes
Copeland compressors used in Trane chillers/heat pumps
are highly automated with digital capability to record and
report a range of operating parameters and critical events.
This technology can be employed to assist in
troubleshooting compressor faults and potential corrective
action.
Table 22. CoreSense™ communications LED flash code information
Status
Fault Condition
Normal Operation
Solid Green
Solid Red
Module Malfunction
Green Flash
Loss of
Code 1
Communication
Green Flash
Future Use
Code 2
Green Flash
Short Cycling
Code 3
Green Flash
Open/Shorted
Code 4
Scroll Thermistor
Green Flash
Future Use
Code 5
Motor High
Red Flash Code
Temperature
1
Red Flash Code
Open/Shorted
2
Motor Thermistor
Red Flash Code
Short Cycling
3
Scroll High
Red Flash Code
Temperature
4
ARTC-SVX010A-EN
Code Fault
Code Reset Description
Description
Module is powered and
operation is normal
Module has internal
fault
Warning LED Flash
Module and master
controller have lost
When communications are
communications with
each other for more
than 5 minutes
N/A
Run time of less than 3
minutes; number of
< 48 short cycles in 24 hours
short cycles exceeds 48
in 24 hours
Ω > 370K or Ω < 1K
N/A
Alert/Lockout LED Flash
Ω > 4.5K ± 25%; lockout
Ω < 2.75K and 30 minutes
after 5 alerts
Ω > 220K or Ω < 40;
40 < Ω < 2.75K and 30 minutes
lockout after 6 hours
Run time of less than 3
minutes; lockout if the
number of alerts
Interrupt power to T2-T1 or perform
exceeds the number
configured by the user
in 24 hours
Ω < 2.4K; lockout if the
number of alerts
Interrupt power to T2-T1 or perform
exceeds the number
configured by the user
in 24 hours
Chiller/Heat Pump Troubleshooting
CoreSense™ Flash Codes
If equipped, the CoreSense technology in the Copeland
compressor will communicate an abnormal system
condition through a unique flash code:
The flash code number corresponds to the number of LED
flashes, followed by a pause, and then the flash code is
repeated.
A lockout condition produces a red flash, followed by a
pause, a solid red, a second pause, and then repeated.
Trouble Shooting Information
N/A
N/A
1.
N/A
2.
1.
confirmed
2.
N/A
N/A
1.
2.
3.
1.
5.1K < Ω < 370K
2.
N/A
N/A
1.
2.
3.
1.
2.
1.
Modbus reset command
2.
3.
1.
2.
Modbus reset command
3.
Reset module by removing power from T2-
T1
Replace module
Check the control wiring
Verify dipswitch 8 is "on"
Check system charge and pressure control
setting.
Adjust set-point of temperature controller.
Install anti-short cycling control.
Check for poor connections at module and
thermistor fusite.
Check continuity of thermistor wiring
harness.
Check supply voltage.
Check system charge and superheat.
Check contactor
Check for poor connections at module and
thermistor fusite.
Check continuity of thermistor wiring
harness.
Check system charge and pressure control
setting.
Adjust set-point of temperature controller.
Install anti-short cycling control.
Check system charge and superheat.
Check system operating conditions
Check for abnormally low suction pressure
75
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