(3)Only the indoor fan does not operate. <Check procedure>

Shut off the power supply once.

Turn the power supply.

Does the fan stop in

NO

no operating status?

 

Control P.C. board is defective.

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

FILE NO. SVM-07008

Replace the P.C. board.

Start the operation with low fan setting in cool operation.

Does the fan rotate?

YES

Change the setting of cooling to high fan.

Does the fan speed become higher?

YES

NO

NO

Does AC 120 V

or higher voltage apply to between red and black lead of fan motor?

YES

Shut off the power supply.

Does the cross flow fan rotate normally?

YES

Turn on the power supply.

Operation stops

NO

NO

Does connecting

terminal, connecting

cable or power supply NO cord completely?

Does not found the short

wire about connecting cable and power cord?

YES

Repair the bearing of the fan.

Motor control circuit failure (IC31, D301) or 12 V

switching module failure (T101).

Replace the P.C. board.

Is the rotation signal (DC+5 V− 0 V)

 

 

 

 

 

 

 

output between 2 (gray lead wire)

 

 

 

 

 

 

 

and 3 (brown lead wire) of the motor

NO

 

Replace the fan motor.

 

connector (CN11) when rotating the

 

 

 

 

 

 

 

 

 

 

 

 

cross flow fan by hand in no operating

 

 

 

 

 

 

 

 

 

 

 

 

 

 

status? (1 pulse/one turn)

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace connecting the

 

 

 

 

 

Replace the control

 

cable (or power cord)

 

Normal

 

 

 

 

 

P.C. board.

 

and terminal

 

 

 

 

 

 

 

block.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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