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OCH791 _45
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-P200YKM3
Страница 20: ...OCH791 _20 6 OUTLINES AND DIMENSIONS Unit mm ...
Страница 21: ...OCH791 _21 7 WIRING DIAGRAM ...
Страница 103: ...OCH791 _103 Photo 16 Accumulator Inlet Outlet Photo 17 Accumulator Accumulator leg Accumulator leg fixing screws ...
Страница 106: ...OCH791 _106 11 ELECTRICAL WIRING Refer to installation manual 6 Electrical work for details ...