Fisher FSKIF-121AE2-EU - Page 151

Troubleshooting
Electrical Control System 147
2.4.4.10. J2 malfunction
When compressor discharge temperature is higher than 115°C, the unit will stop, and unit runs again when
compressor discharge temperature is lower than 90°C.
P4 display
Temperatureprotectionof
compressordischarge
Checkwhetherthe
compressordischargetemp.is
morethan115°C?
Check whether the
connection is right between
compressor discharge temp.
sensor and PCB according
to wiring diagrams?
Measure the resistance value
of compressor discharge
temp. sensor. If the value is
not normal isnormal referto
theAppendix 2?
No
Yes
Yes
No
Correct the wiring connection
Stopleakingandaddrefrigerant
Replace the compressor discharge temp. sensor
No
Yes
Replace high pressure valve assy
Yes
No
Replace outdoor main PCB
No
Checkwhetherthe
refrigerantisleak
J2