38MBR: Service Manual
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37
J2 Malfunction
Troubleshooting
Error Code
J2
Malfunction decision conditions
When the compressor discharge temperature (T5) is more than 115°C for 10 seconds, the compressor will
stop and not restart until T5 is less than 90°C.
Supposed Causes
• Refrigerant leakage
• Faulty wiring
• Faulty discharge temperature sensor
• Faulty outdoor PCB
J2 displayed
Temperature protec
Ɵ
on
of condenser discharge
Is the compressor
temperature higher
than 239
°
F (115
°
C)
?
Stop the leak and
add refrigerant.
Are the compressor
discharge temp. sensor
and PCB connected
properly according to
the wiring diagrams
?
No
Fix the wiring
connec
Ɵ
on.
No
Yes
No
Replace the compressor
discharge temp. sensor.
Replace the
outdoor main PCB.
Does the problem s
Ɵůů
exist
?
Replace the
high pressure valve assembly.
No
Is the refrigerant
leaking
?
Yes
No
Measure the
compressor discharge
temp. sensor’s resistance value.
Is the value abnormal
?
Refer to Appendix 2.
Does the problem
s
Ɵůů
exist
?
Yes
Yes
