Sanyo CH3632, XHS3632 Checking the Electrical Components, Measurement of Insulation Resistance

4. Service procedures

4-2 Checking the Electrical Components

(1) Measurement of Insulation

Resistance

• The electrical insulation is acceptable
when the resistance exceeds 1 MΩ.	Probe
1 Power Supply Wires

Earthed wire

Clip

Insulation tester

Fig. 21

Clamp the earthed wire of the Power Supply wires with a lead clip of the insulation resistance tester and mea- sure the resistance by placing a probe on either of the power wires. (Fig. 21)

Then measure the resistance between the earthed wire and the other power wires. (Fig. 21)

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. 22)

3Outdoor Unit

Clip

Copper tube or metallic part

0638_X_S

Terminal plate

Probe

Insulation tester

0639_X_S

Section

1

2

Fig. 22

Measure the resistance by placing a probe on the terminal plate in the same manner as explained above 2. (Fig. 22)

4Measurement of Insulation Resistance for Electrical parts

•Disconnect the connector of the desired electric part from terminal plate, P.C.B. Ass’y, etc. (Fig. 23)

•Similarly, disconnect the lead wires from compressor, capacitor, etc. (Fig. 24)

Clip

Copper tube or metallic part

Probe

3

4

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

Insulation tester

0640_X_S

From fan motor, compressor and other parts.

Metallic	Probe
part
Clip

Insulation tester

0641_X_S

Fig. 23

Fig. 24

SM830076

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