SM830042
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4
4. Service procedures
b) Check compressor motor thermal protector (49C)
0628_X_S
• Check voltage between
terminals No.2 and No.4 at
terminal plate.
• Check P.C.B. Ass’y.
No voltage appears.
P.C.B. Ass’y is defective.
D. Check indoor unit P.C.B.
E. Check float switch.
• Refer to “2-3 Drain Pump Control”
0629_X_S
Is drainage prevented from
flowing ?
• Check drain hose.
YES
• Check float switch (FS).
NO (Wait for 20 minutes.)
0626_X_S
Is temperature of compressor
abnormally high ?
Refrigerant gas shortage.
YES
NO
Compressor is defective.
Charge refrigerant gas.
• Check compressor motor
thermal protector. (49C)
0627_X_S
• Check compressor motor
magnetic contactor.
(52C)
(Only outdoor fan does not run.)
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