Mitsubishi Electric PUMY-P125VMA, Техническое и сервисное руководство

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4116 Fan rotational frequency abnormality
(Detected only PKFY-P·VAM-A)
1) Fan rotational frequency detecting
connector (CN33) disconnection in the
indoor controller board.
Display Meaning and detecting method
Causes
Check points
Check whether the connector (CN33)
in the indoor controller board is
disconnected or not.
When rotational frequency of the fan is
detected 180rpm or less, or 2000rpm or
more (1st detection) while the indoor unit
fan operation, the fan stops for 30seconds.
2) Fan output connector (FAN1)
disconnection in the indoor power
board.
Check whether the connector (FAN1)
in the indoor power board is
disconnected or not.
When the rotational frequency of the fan is
detected 180rpm or less, or 2000rpm or
more again after the fan restarts, the indoor
unit stop abnormally (fan stops). In this
time, <4116> is displayed.
3) Fan rotational frequency detecting
connector (CN33) wiring breakage in
the controller board or fan output
connector (FAN1) breakage in the
indoor power board Check whether the wiring is
disconnected or not.
4) Filter clogging Check the filter.
5) Indoor fan motor trouble Check the indoor fan motor.
When there is no problem in the
above-mentioned from
1
to
5
;
6) Fan rotational frequency detecting
circuit failure in the indoor controller
board or fan output circuit failure in the
indoor power board.
(1) In the case of abnormality after the
fan operation;
Replace the indoor controller board.
When the fan does not recover even if
the indoor controller board is replaced,
replace the indoor power board.
(2) In the case of abnormality without
fan operation, replace the indoor
power board.
4220
PUMY-P125VMA
Abnormality such as overvoltage or voltage
shortage and abnormal
synchronous signal to main circuit
Abnormal if any of followings are detected
during compressor operation;
• Decrease of DC bus voltage to 270V
• Instantaneous decrease of DC bus
voltage to 200V
• Increase of DC bus voltage to 400V
1) Decrease of power supply voltage
2) Disconnection of compressor wiring
3) Defective 52C
4) Disconnection or loose connection of
CN52C
5) Defective ACT module
6) Defective ACT module drive circuit of
outdoor power board
7) Disconnection or loose connection of
CNAF
8) Defective 52C drive circuit of outdoor
control board
9) Disconnection or loose connection of
CN5
10) Disconnection or loose connection
of CN2
Check the facility of power supply.
Correct the wiring (U•V•W phase) to
compressor.
Replace 52C.
Check CN52C wiring.
Replace ACT module.
Replace outdoor power board.
Check CNAF wiring.
Replace outdoor controller board.
Check CN5 wiring.
Check CN2 wiring.
1
2
1
2
3
4
5
6
1
2
3
4
5
6
7
8
9
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