Sanyo SAP-K77RAX User Manual download pdf (Page 44)

9-2. Air conditioner does not operate.

9-2-1. Circuit breaker trips (or fuse blows).

(1) When the circuit breaker is set to ON, it is tripped soon. (Resetting is not possible.)

Outdoor

unit

Indoor

unit

Power

supply

wiring

Inter-unit

wiring

Circuit

breaker

Power

supply

Ground

1. Turn off the circuit breaker and disconnect the

power supply wiring. Fig. 1

2. Disconnect the inter-unit wiring from the outdoor

unit terminal plate. Fig. 1

3. Measure insulation resistance of outdoor unit.

1. Insulation of outdoor unit is defective.

2. And measure insulation resistance of electrical

parts in outdoor unit to specify the insulation fault.

Does the insulation resistance read 2M ohm or more ?

There is a possibility of ground fault.

There is a possibility of insulation fault.

< Failure Cause >

< Identification Method of the Failure Cause >

< Check outdoor unit >

Fig.1

1. Turn off the circuit breaker and disconnect the

power supply wiring. Fig. 1

2. Disconnect the inter-unit wiring from the indoor

unit terminal plate. Fig. 1

3. Measure insulation resistance of indoor unit.

1. Insulation of indoor unit is defective.

2. And measure insulation resistance of electrical

parts in indoor unit to specify the insulation fault.

Does the insulation resistance read 2M ohm or more ?

< Check indoor unit >

Identify the failure cause using the following procedure.

Turn off the circuit breaker and disconnect the power supply wiring

to prevent the electric shock or damage to any measuring instrument.

WARNING

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Sanyo SAP-K77RAX User Manual Page 44

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