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OCH791 _46
4400 (U8): Fan trouble (Outdoor unit)
Abnormal points and detection methods
No rotational frequency is detected, a value outside the
specified range is detected during fan motor operation.
Causes and checkpoints
• Malfunction of fan motor
• Disconnection of CNF connector
• Defective outdoor multi controller circuit board
Diagnosis of failure
* For the detail, refer to "Check method of DC fan motor (fan motor/outdoor multi controller circuit board)".
Replace the outdoor multi controller circuit board.
Replace the defective fan motor.*
Connect the wiring/connector properly.
Replace it in the case of breakage.
Replace the outdoor multi controller circuit board
(Malfunction of thermistor circuit).
No abnormality
(A connector contact failure is suspected.)
Check the fuse on the outdoor multi controller
circuit board.
Check the fan motor connector (CNF1 and
CNF2) for disconnection or looseness.
1. While the breaker is OFF, disconnect the compressor
wiring (U/V/W) from the outdoor power circuit board.
2. While the breaker is OFF, disconnect the fan motor con
-
nector CNF1 and CNF2.
3. When 5 minutes have passed since turning ON the break
-
er, turn SW7-1 ON.
4. Check the voltage of the outdoor multi controller circuit
board.
Test points are;
• VDC approx. 310 to 350 V DC (fan connector 1–4)
• VCC approx. 15 V DC (fan connector 5–4)
• VCC approx. 0–6.5 V DC (fan connector 6–4)
Has the fuse melted?
Is there any abnormality such as
disconnection, looseness or break
-
age?
Is the voltage normal?
Yes
(Melted)
Yes
No
No
(Not melted)
No
Yes
Note:
•
Set SW7-1 OFF after the troubleshooting completes.
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 ...