Troubleshooting; Fault Code 3 – Enter Water Temperature Sensor Fault; Fault Code 4 – Actual Refrigerant Temperature Sensor Fault; Fault Code 5 – Outdoor Air Sensor Of Gmc Fault - Carrier 30AWH004HB Service Manual

6.4 Troubleshooting

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