71
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Disconnect CN931 and measure the
resistance of the outdoor fan motor.
Is the resistance of outdoor fan motor
normal? (Refer to right table)
Turn on the power supply to start operation
and measure the voltage of connector CN931.
Turn OFF the power supply and connect
the connector CN931.
Turn ON the power supply and measure
the voltage of connector CN931 while
rotating the motor by the hand.
Does the outdoor fan motor rotate smoothly?
Replace the outdoor fan motor.
Resistance
60 k
Ω
160 k
Ω
Measuring points
* To measure the resistance, connect
the negative (-) end of the tester to pin 4.
* To measure the voltage, connect the negative (-)
end of the tester to pin 4.
* Voltage between pin 4 and 6 should be measured
within 1 minute after the operation starts.
pin 1 - pin 4
pin 5 - pin 4
pin 6 - pin 4
pin 7 - pin 4
Voltage
15V DC
325 V DC
1 - 5V DC
CN931
pin 1 - pin 4
pin 5 - pin 4
pin 6 - pin 4
Is the voltage of connector CN931
normal? (Refer to right table.)
Replace the outdoor control P.C. board.
Does the voltage between pin 7 and pin 4
of connector CN931 repeat 0V and 5V?
Replace the outdoor fan motor.
Does the fan motor operate for about
5 seconds?
Replace the outdoor fan motor.
Replace the outdoor fan motor.
Replace the outdoor control P.C. board.
Start operation.
MXZ-6C120VA
CN931
Outdoor control P.C. board
MXZ-6C
Summary of Contents for MXZ-3C54VA
Page 16: ...16 WIRING DIAGRAM 6 MXZ 3C54VA ...
Page 17: ...17 MXZ 3C68VA ...
Page 18: ...18 MXZ 4C71VA ...
Page 19: ...19 MXZ 4C80VA ...
Page 20: ...20 MXZ 5C100VA ...
Page 21: ...21 MXZ 6C120VA ...