Fault Code 27 – Compressor Lock; Fault Code 28 – Discharge Temperature Error - Carrier 30AWH004HB Service Manual

Fault code 27 – Compressor lock
I t s e h
Are the connections of cables and
connectors correct
Is the compressor
functional
Fault code 28 – Discharge temperature error
Is the protective control, such
as discharge temperature
release, normal
Is the refrigerant charge correct
Does and overload condition exist
Are the resistance characteristics of the TD
sensor normal
SM_30AW.indd 84
p o w r e u s p p y l o v a t l e g c r o e r t c
YES
YES
NO
Has there been a refrigerant
leak
YES
Does the electronic expansion
valve operate normally
Check GMC & inverter Board – if
defective, replace
NO
YES
YES
NO
YES
NO
NO
NO
YES
NO
YES
Are the connections of
NO
cables and connectors
correct
YES
NO
YES
NO
84
Diagnostic
C r o e r t c power supply voltage
Check and correct the
cabling & connections
Compressor lock - replace
Check TE and TS Sensors, replace
if defective
Check expansion valve, replace if
defective
Check and correct the
cabling & connections
Check parts, if defective
replace
Check and correct the
refrigerant charge
Delete the cause of
overload
Replace the TD sensor
Check Inverter board,
replace if defective
6
30AW
14-03-2011 14:45:37