86
Disconnect CNF1 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 CNF1.
Turn OFF the power supply and connect
the connector CNF1.
Turn ON the power supply and measure
the voltage of connector CNF1 while
rotating the motor by the hand.
Does the outdoor fan motor rotate smoothly?
Replace the outdoor fan motor.
* To measure the voltage, connect the negative (-)
end of the tester to pin4.
* Voltage between pin4 and 6 should be measured
within 1 minute after the operation starts.
* To measure the resistance, connect
the negative (-) end of the tester to pin4.
Voltage
15 V DC
294/325 V DC
1 - 5 V DC
CNF1
pin1 - pin4
pin5 - pin4
pin6 - pin4
Is the voltage of connector CNF1
normal? (Refer to right table.)
Does the voltage between pin7 and pin4
of connector CNF1 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.
Start operation.
Replace the outdoor control P.C. board.
Replace the outdoor control P.C. board.
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Resistance
40 kΩ
1.1 MΩ
220 kΩ
Measuring points
pin1 - pin4
pin5 - pin4
pin6 - pin4
pin7 - pin4
CNF1
Outdoor control
P.C. board
Check of outdoor fan motor
• Fan motor does not operate or stops operating shortly after starting the operation.
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