Mitsubishi MUY-A15NA, Руководство по обслуживанию

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47
MUZ-A09/12/15/17 MUY-A15/17
Check of outdoor fan motor
I
Outdoor fan motor does not operate.
Does the voltage between
each terminal repeat 5V
and 0V DC by turns?
Does the outdoor fan
rotate smoothly?
Check the inverter P.C. board.
(Refer to 10-5.
M )
No
Yes
Yes
( Fixed to either 5V or 0V DC)
Yes
No
No
Rotate the outdoor fan slowly
by hand, and measure the
voltage of CN931 (Measurement
of feedback output).
Between
1
(+) and
5
(-)
Between 2 (+) and 5 (-)
Between
3
(+) and
5
(-)
Is the resistance
between each terminal of
outdoor fan motor normal?
(Refer to 10-4.)
Disconnect CN932
from the inverter
P.C. board.
Replace the outdoor fan
motor.
CN931
CN932
Inverter P.C. board
(Solder side)
Turn ON the
power supply.
I I
Check of outdoor fan motor
• Fan motor does not operate or stops operating shortly after starting the operation.
Yes
Yes
Yes
No
No
(Fixed to either 5V or 0V DC)
Check the connection between the
connector CN931 and CN932.
Disconnect CN932 from outdoor electronic control 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 (-)
Is the resistance between each terminal
of outdoor fan motor normal?
Does the outdoor fan motor rotates smoothly?
Does the voltage between each terminal become 5V DC and 0V DC
repeatedly?
Replace the outdoor DC fan motor.
Replace the outdoor electronic control P.C. board.
MUZ-A24 MUY-A24
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