Panasonic S-36PU1E5A Service Manual page 585

F04 Compressor Discharge Temperature Sensor (TD) Trouble
1. Error Detection Method
It is judged an error based on the criteria listed below.
• Open circuit or Short circuit
2. Error Diagnosis
1 Sensor
1-1 Sensor connector is connected to PC board properly.
1-2 Sensor is correctly installed at holder side.
1-3 Abnormal temperature exists even after replacing sensor.
2 PC board
Resistance between connector pins on PC board is less than
2-1
1 k ohm
2-2 Abnormal temperature exists even after replacing PC board.
3 Operating
3-1 Peripheral temperature of outdoor unit is over 46°C.
status
3-2 Tends to have insufficient refrigerant charge in the system.
3-3 Check noise.
5-29
Yes 1-2
No Reconnect and check
Yes Replace sensor
No Correct and see what
happens.
1-3
Yes 2-1
No See what happens.
Yes Replace PC board
No 2-2
Yes 3-1
No See what happens.
Yes Correct
No 3-2
Adjust the amount
Yes
of refrigerant
No 3-3
5