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SM830043
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4
4. Service procedures
E. Check. auxiliary relay. (1Y or 2Y)
0620_X_S
• Check coil resistance of
auxiliary relay.
(1Y or 2Y)
F. Check indoor fan motor thermal protector (49FMI)
• Disconnect the socket from 9P (WHT) connector.
• Check the continuity
between No. 8 and No.9
poles of the 9P socket.
The thermal protector (49FMI)
is operated.
No continuity.
0621_X_S
• Check fan rotation.
Rotate the fan gently once
or twice by hand.
Check fan casing
for foreign matter
on the inside.
Remove foreign
matter or repair.
Repair or replace.
Fan cannot
be rotated.
OK
• Check fan motor capacitor.
Fan motor burnout
or foreign matter
in bearing.
G. Check fuse on the P.C.B. Ass’y in the indoor unit.
0665_T_S
• Check fuse on the P.C.B.
Ass'y in the indoor unit
for continuity.
• Check transformer. (TR)
• Check resistance of indoor
fan motor winding.
(FMI)
• Check resistance of louver
motor winding. (LM)
When the fuse blows.
OK
OK
OK
• Check coil of compressor
motor magnetic contactor.
(52C)
• P.C.B. Ass'y is defective.
OK
OK
• Check resistance of dew
proof heater. (DPH)