Mitsubishi Electric Mr. Slim MUZ-GE15NA-1, Руководство по обслуживанию

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55
Is there 230 VAC between CN721 (
MUZ-
GE09/12/15/18
)/CN602 (
MUZ-GE24
) and
on the inverter P.C. board 3 minutes after
the power supply is turned ON?
Yes
No
Replace the inverter
P.C. board.
Replace the 4-way valve.
Unit operates HEAT mode even if it is set to COOL mode.
Disconnect connector between the
compressor and intelligent power
module/ power module 1.
Turn ON the power supply and press
EMERGENCY OPERATION switch
once (COOL mode).
I Check of outdoor fan motor
Is the resistance between each ter-
minal of outdoor fan motor normal?
(Refer to 10-4.)
Disconnect the connectors CN931 and CN932
from the inverter P.C. board.Check the connec-
tion between the connector CN931 and CN932.
Disconnect CN932 from the inverter P.C. board, and turn on the
power supply.
Rotate the outdoor fan motor manually and measure the voltage
of CN931.
Between 1(+) and 5(-)
Between 2(+) and 5(-)
Between 3(+) and 5(-)
Does the voltage between each terminal become 5 and 0
VDC repeatedly?
Does the outdoor fan motor rotate smoothly?
Replace the outdoor fan motor. Replace the inverter P.C. board.
Yes
Yes
No
(Fixed to either 5 or 0 VDC)
No
No
Yes
1
Intelligent power module:
MUZ-GE09/12/15/18/24NA
,
MUY-GE09/12/15/18/24NA
Power module:
Other models
OBH549F