Check code
5300
(UH)
Primary current error
Abnormal points and detection methods
Causes and checkpoints
If the detected current sensor input value (primary current) during
compressor operation is outside the specified range.
Decrease/trouble of power supply voltage
Disconnection of compressor wiring
Input sensor trouble on outdoor power circuit board
●Diagnosis of defects
Make sure to turn the power OFF before connecting/disconnecting
any connectors, or replacing boards.
Diagnosis
Remedy
No
No
Yes
Yes
72
OCH634C
Does it satisfy the condition 1 in
the lower right?
Is there any abnormality such as
disconnection or looseness?
The power supply voltage is decreased or
abnormal.
Check the power supply facility.
Connect the compressor wiring properly.
Replace the outdoor power circuit board
(Malfunction of current sensor circuit).
Check the input current at the time of
abnormal stop.
Check the compressor wiring for
disconnection or looseness.
Condition 1:
34A or more for 10 consecutive seconds, or
38A or more.
