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38MGRBQ: Service Manual
DIAGNOSIS AND SOLUTION (CONT)
P4/PC 06 (Temperature protection of compressor discharge) diagnosis and solution
ERROR CODE
MALFUNCTION DECISION
CONDITIONS
SUPPOSED CAUSES
Troubleshooting
Temperature protection of
compressor discharge
Check whether the
compressor discharge temp. is
high than 239°F (115°C)
No
Check if the connection between
the compressor discharge
temperature sensor and the PCB
is correct according
to the wiring diagrams.
Yes
Measure the resistance value
of the compressor discharge
temperature sensor. If the value
is not normal, refer to Appendix 2.
Yes
Replace outdoor main PCB
No
Replace high pressure valve assy
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
P4/PC 06
When the compressor discharge temperature(T5) is more than 239
compressor stops and restarts until T5 is less than 194
Wiring mistake
Refrigerant leak
Faulty discharge temperature sensor
Faulty outdoor PCB
Check whether the
Yes
refrigerant leaks
No
No
No
Replace the compressor discharge temp. sensor
F (90
C)
Yes
Correct the wiring connection
66
F (115
C) for 10 seconds, the
Stop the leak and add refrigerant
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