Fisher FSKIF-121AE2-EU - Page 152

Troubleshooting
148 Electrical Control System
2.4.4.11. J1 malfunction
When condenser high temp. is more than 65°C, the unit will stop, and unit runs again when outdoor pipe
temp. less than 52°C.
P5 display
Hightemperatureprotectionof
condenser
Check whether the
condenser temperature is
Higher than 65°C
Yes
Check whether the
resistance of condenser
temp. sensor is normal
refertotheAppendix 1
Replacethetemperaturesensor
No
No
Check whether the outdoor
ambient temperature is
higher than 50℃
No
StoptheunitYes
Checkiftheoutdoorunit
ventilationisgood
Yes
Make the outdoor unit ventilate well
Check whether the heat
exchanger is dirty
No
Clean the heat exchanger
Yes
Check whether the refrigerant
system is ok
Replace outdoor main
board
No
Refrigerantisnotenoughaddthe
refrigerant
No
Checkiftheoutdoorfanruns
properly
pleaserefertothesolutionoffan
speedhasbeenoutofcontrol
malfunction.Findoutthecauseand
haveitsolved.
No
Yes
No
CorrecttheconnectionNo
Yes
Checktheconnection
betweentemperature
sensorandPCB.
Yes
J1