Sanyo SPW-C363G5 Checking the Electrical Components, Measurement of Insulation Resistance

4. Service procedures

4-4 Checking the Electrical Components

(1) Measurement of Insulation

Resistance

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

1Power Supply Wires

Clamp the earthed wire of the Power Supply wires with a lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the power wires. (Fig. 42)

Then measure the resistance between the earthed wire and the other power wires. (Fig. 42)

2Indoor Unit

Clamp an aluminum plate fin or copper tube with the lead clip of the insulation resistance tester and

Clip

measure the resistance by placing a probe on the terminal plate (Fig. 43)

Copper tube or metallic part

Earthed wire

Clip

	Insulation
	tester
	0638_X_S
Terminal plate	Fig. 42

Probe

Insulation tester

0639_X_S

4

3Outdoor Unit

Measure the resistance by placing a probe on the terminal plate in the same manner as explained above 2. (Fig. 43)

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. 44)

•Similarly, disconnect the lead wires from compressor, capacitor, etc. (Fig. 45)

•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.

Fig. 43

Probe

Clip

Copper tube or metallic part

Insulation tester

0640_X_S

Fig. 44

From fan motor, compressor and other parts.

Metallic	Probe
part
Clip

Insulation tester

0641_X_S

Fig. 45

SM830043

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