OCH790 _54
4250 (U6): Power module trouble
Abnormal points and detection methods
Both of the following conditions have been satisfied:
•
Overcurrent of DC bus or compressor is detected during
compressor operation.
•
Inverter power module is determined to be faulty.
Causes and checkpoints
•
Short-circuit caused by looseness or disconnection of
compressor wiring
• Defective compressor
•
Defective outdoor power circuit board
Diagnosis of failure
Connect the compressor wiring (U, V and W
phase) properly, then turn the power back ON.
Replace the outdoor power circuit board or the
outdoor multi controller circuit board
(Defective outdoor power circuit board).
Replace the compressor
(Defective compressor).
Turn the power OFF to check for looseness or
disconnection of the compressor wiring.
1. Disconnect the compressor wiring (U-V-W
phase).
2.
Turn ON the SW7-1(*) on the outdoor multi
controller circuit board.
3. Operate the unit.
* SW7-1 ON: Ignore 5300(UH) error.
Is it connected properly?
Is error code 4250 still displayed?
Yes
Yes
No
No
Содержание CITY MULTI PUMY-P112VKM6
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