12. SERVICE PROCEDURES

(4)Checking the Electrical Components

1)Measurement of Insulation Resistance

•The electrical insulation is acceptable when the resistance exceeds 1 MΩ.

1Power Supply Wires

Clamp the earthed wire of the Power Supply wires with a lead clip of the insu- lation resistance tester and measure the resistance by placing a probe on either of the power wires. (Fig. 13)

Then measure the resistance between the earthed wire and the other power wires. (Fig. 13)

2Indoor Unit

Clamp an aluminum plate fin or copper tube with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on the terminal plate (Fig. 14)

3Outdoor Unit

Measure the resistance by placing a probe on the terminal plate in the same manner as explained above 2. (Fig. 14)

4Measurement of Insulation Resis- tance for Electrical parts

•Disconnect the connector of the de- sired electric part from terminal plate, P.C.B. Ass’y, etc. (Fig. 15)

•Similarly, disconnect the lead wires from compressor, capacitor, etc. (Fig. 16)

•Measure the resistance in the same manner as illustrated on the right.

Refer to Electrical Wiring Diagram.

NOTE

If the probe does not enter the hole be- cause the

hole is too narrow, use a probe with a thinner pin.

Earthed wire

Clip

Probe

 

 

 

 

Insulation

 

Fig. 13

 

 

 

 

tester

 

 

 

 

 

 

 

 

 

 

0638_X_S

 

Terminal plate

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Probe

Clip

 

 

Copper

Insulation

 

tube or

tester

 

metallic part

 

Fig. 14

 

0639_X_S

Probe

Clip

Copper tube or metallic part

Insulation

Fig. 15

tester

 

0640_X_S

From fan motor, compressor and other parts.

Metallic

Probe

part

 

Clip

 

Insulation

 

tester

Fig. 16

0641_X_S

 

SM830078

– 62 –

Page 61 Page 63
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Sanyo C4232, CL4232 service manual Power Supply Wires, Measurement of Insulation Resis- tance for Electrical parts
Page 61 Page 63

CL4232, C4232 specifications

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