Sanyo SAP-CRV93EH Checking Electrical Components, Measurement of Insulation Resistance

11. CHECKING ELECTRICAL COMPONENTS

11-1. Measurement of Insulation Resistance

●The insulation is in good condition if the resistance exceeds 1MΩ .

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)

11-1-2. Indoor unit

Clamp an aluminum plate fin or copper tube with the lead clip of the insulation resistance tester and mea- sure the resistance by placing a probe on each termi- nal screw where power supply lines are connected on the terminal plate. (Fig. 2)

Ground wire

Clip

Probe

Insulation tester

Fig. 1

Terminal plate

Probe

Clip

11-1-3. Outdoor unit

Clamp an aluminum plate fin or copper tube with the lead clip of the insulation resistance tester and mea- sure the resistance by placing a probe on each termi- nal screw on the terminal plate. (Fig. 2)

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

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 discon- nect 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.

Copper	Insulation
tube or	tester
metallic part

Fig. 2

Probe

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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