Inspection Procedure For Blown Fuse On The Indoor And Outdoor Pcb - Mitsubishi Heavy Industries SRK20ZSPR-S Technical Manual

(11) Inspection procedure for blown fuse on the indoor and outdoor PCB

( )
Faulty part, other than
fan motor
Replace the faulty part and the
fuse. Test-run then the unit for
checking.
Replace the indoor and outdoor PCB and the fan motor. Check then the operation.
Is the fuse blown on the indoor and
outdoor PCB?
YES
YES
Is there any faulty part (fan motor, etc)?
(See pages 112 to 119.)
YES (Fan motor is faulty.)
Is there any damage on the internal circuit
of fan motor?
Check the resistance value to judge.
(See pages 113 to 119.)
Replace the fuse on the indoor and
outdoor PCB. When the operation is
checked without connecting the fan
motor connector, does the fuse blow?
YES
Go to the inspection procedure for electric
NO
equipment of indoor and outdoor units
(See pages 112 to 119.)
NO
Replace the fuse, and check the operation.
NO
Replace the fan motor, and check the operation.
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'17 • SRK-T-206