Carrier 30AWH012HB - Troubleshooting Fault Codes

77
30AW
Diagnostic
6
6.4 Troubleshooting
Fault code 3 – Enter Water Temperature sensor fault
Is the TA sensor correctly connected?
(See Wiring Diagrams)
Are the resistance characteristics of the
temperature sensor TA normal?*
Correctly connect the TA Sensor
Replace defective TA Sensor
Check indoor P.C. Board - replace if
defective
NO
YES
YES
NO
* Check resistance curve
Fault code 4 – Actual Refrigerant Temperature sensor fault
Fault code 5 – Outdoor Air sensor of GMC fault
Is the TR sensor correctly connected?
(See Wiring Diagrams)
Are the resistance characteristics of the
temperature sensor TR normal?*
Correctly connect the TR Sensor
Correct connect the TR Sensor
Check indoor P.C. Board - replace if
defective
NO
YES
YES
NO
* Check resistance curve
Is the sensor correctly connected? (See
Wiring Diagrams)
Are the resistance characteristics of the
temperature sensor normal?*
Correctly connect the Sensor
Correct connect the Sensor
Check indoor P.C. Board - replace if
defective
NO
YES
YES
NO
* Check resistance curve
SM_30AW.indd 77 14-03-2011 14:45:30