Fisher FSAI-SU-91AE2 Service Manual page 49

High temperature protection of compressor top:
Check the air flow system
Clear up the air inlet and outlet or the heat
Yes
of indoor and outdoor units
exchanger of indoor and outdoor units.
No
Power off, then restart the unit 10
minutes later
Yes
Check if the temperature Check the overload
No No Correct the connection.
of compressor protector
Yes
Yes
Measure the resistance
between the two ports of
No
Replace the OLP.
Check refrigerant system
the OLP. Is it zero?
Yes
Yes Replace the outdoor control PCB.
Radiator and refrigerant copper pipe
49