Fisher FSAI-SU-92AE2 Service Manual page 48

8.2.9 High temperature protection of IPM or compress top diagnosis and solution (P2)
Error Code
Malfunction decision
conditions
Supposed causes
Trouble shooting:
Check if the CompTop port on the PCB
Check if the CompTop port on the PCB
connects with a sensor
Check if the radiator and
Check if the radiator and
refrigerant copper pipe connect
refrigerant copper pipe connect
well
well
Correct the connection.
P2
If the sampling voltage is not 5V, the LED will display the failure.
Power supply problems.
●
System leakage or block
●
PCB faulty
●
Connection problems
●
connects with a sensor
No
No
Correct the connection.
Yes
Please refer to the solution of 【 High
Please refer to the solution of 【 High
temperature protection of
temperature protection of
compressor top 】malfunction
compressor top 】malfunction
Yes
Check refrigerant system
Check refrigerant system
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