12. SERVICE PROCEDURES
C. Check “Operation selector” switch in the indoor unit.
• Has “Operation selector” | YES | ||
switch been set to ON | |||
| |||
position ? |
| ||
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|
| |
| NO |
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|
| |
Set “Operation selector” |
| ||
switch to ON. |
| ||
But neither unit runs.
Switch Ass’y or P.C.B. Ass’y in the indoor unit is defective.
IND. LAMP Ass’y or P.C.B. Ass’y in the indoor unit
is defective.
0617_X_S
D.Check compressor motor protectors.
(a) High pressure switch (63PH)
•Check high pressure switch. Does high pressure switch
actuate ? (63PH)
YES
•Is outdoor heat exchanger coil dirty or are there obstacles near air suction inlet of outdoor unit ?
NO
•Check if outdoor fan rotates. Refer to “Only outdoor fan does not run.”
Disconnect the socket from 2P (WHT) connector. Check the continuity between No.1 and No.2 poles of the socket.
|
|
|
YES |
| Clean heat exchanger coil |
|
| or remove obstacles. |
|
|
|
|
|
|
0618_X_S
E.Transformer in indoor unit.
•Check resistance of transformer winding. (TR1)
1033_X_S
SM830078
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