11. CHECKING ELECTRICAL COMPONENTS

11-1. Measurement of Insulation Resistance

The insulation is in good condition if the resistance exceeds 1M ohm.

11-1-1. Power Supply Cord

Clamp the grounding wire of power cord with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the two power wires. (Fig. 1)

Then also measure the resistance between the grounding and other power terminals. (Fig. 1)

Ground wire

Clip

Probe

Insulation tester

Fig. 1

Terminal plate

11-1-2. Indoor 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 each terminal screw where power supply lines are connected on the terminal plate. (Fig. 2)

11-1-3. Outdoor 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 each terminal screw on the terminal plate. (Fig. 2)

Note that the ground line terminal should be skipped for the check.

Probe

 

Clip

Copper

Insulation

tube or

tester

metallic part

 

Fig. 2

Probe

11-1-4. Measurement of Insulation Resistance for Electrical Parts

Disconnect the lead wires of the desired electric part from terminal plate, capacitor, etc. Similarly disconnect the connector. Then measure the insulation resistance. (Figs. 3 and 4)

NOTE

Refer to Electric Wiring Diagram.

If the probe cannot enter the poles because the hole is too narrow then use a probe with a thinner pin.

Clip

Copper tube or metallic part

Insulation tester

Fig. 3

From fan motor, compressor and other parts

Metallic

Probe

part

 

Clip

 

Insulation tester

Fig. 4

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Sanyo SAP-KRV94EHDX service manual Checking Electrical Components, Measurement of Insulation Resistance
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SAP-KRV94EHDX specifications

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