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FILE NO. SVM-03008
4. WIRING DIAGRAM
4-1. Indoor Unit
Table 4-1-1 Simple Check for Failure Diagnosis
Refer to the service data for the detailed failure diagnosis.
1
2
3
4
5
6
Diagnosis Result
Check to see if the OPERATION indicator goes on and off when the main
switch or breaker is turned on.
(Check the primary and secondary voltage of the transformer.)
Check the power supply voltage between 1 and 2. (Refer to the name plate.)
(Check the primary and secondary voltage of the transformer.)
Check the fluctuating voltage between 2 and 3. (DC15 to 60 V)
Check to see if the fuse blows out.
(Check the R04 of the varistor.)
Check the voltage at the No. 4 pin on CN13 connector of the infrared receiver.
(Check the transformer and the power supply circuit of the rated voltage.)
Check the voltage at the white lead of the louver motor.
(Check the transformer and the power supply circuit of the rated voltage.)
Check the voltage at the No. 1 pin on CN10 connector.
(Check the DB01, R05 and C03.)
Check Item
OPERATION
INDICATOR
TERMINAL BLOCK
FUSE 3.15A
DC5V
DC12V
DC325V
(DC310 to 340V)