Mini VRF SYSTEM
Trouble Diagnosis
3
3-25
3. Mini VRF System Alarm Codes
F04 Compressor Discharge Temperature Sensor Error
Error Detection Method
Error Diagnosis
It is judged an error based on the criteria listed below.
Open circuit or Short circuit
When compressor stopped temporally, even after 20 minutes passed, over 103°C of discharge temperature is detected.
•
•
1.
2.
Compressor stopped and remained over 60 minutes but over 93°C of discharge temperature is detected.
•
Sensor connector is connected to PC board properly.
1-1
Sensor is correctly installed at holder side.
1-2
1-2
Reconnect and check
Replace sensor
Correct and see what
happens.
1-3
Yes
No
1 Sensor
2 PC board
3 Operating
status
Yes
No
Resistance between connector pins on PC board is less than
1 k ohm
2-1
Replace PC board
2-2
Yes
No
Peripheral temperature of outdoor unit is over 46°C.
3-1
Check noise.
3-3
Correct
3-2
Yes
No
Tends to have insufficient refrigerant charge in the system.
3-2
Adjust the amount
of refrigerant
3-3
Yes
No
Abnormal temperature exists even after replacing PC board.
2-2
3-1
See what happens.
Yes
No
Abnormal temperature exists even after replacing sensor.
1-3
2-1
See what happens.
Yes
No
SM830209-00̲Mini̲VRF SYS.indb 25
SM830209-00̲Mini̲VRF SYS.indb 25
2012/01/11 18:25:10
2012/01/11 18:25:10
