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Troubleshooting
Diagnostic procedure for check code
Check code Operation cause
[Ab] 1. Connector misconnection of Pd/Ps sensors
Pressure sensor (Pd/Ps) miswiring 2. Pd/Ps sensor error
3. Compressor inverse operation, compressor error
Are the output voltage
characteristics of Pd sensor/Ps
sensor normal ?
Modify wiring.
Check the interface board.
No
No
Is the pipe connection position of
Pd sensor/Ps sensor correct ?
Check connection.
Pd sensor: CN501
Ps sensor: CN500
No
Yes
Yes
Is the wiring of compressor
normal ?
Yes
Are the pressure
characteristics normal when
compressor is operating ?
Check compressor.
No
Yes
Sensor error
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