Sanyo STB0811C1, STB0823H1 Checking Electrical Components, Measurement of Insulation Resistance

8-1. Measurement of Insulation Resistance

●The insulation is in good condition if the resistance exceeds 2MΩ .

8-1-1. Power Cord and Unit

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

Then, also measure the resistance between the grounding prong and other power blade. (Fig. 1)

8-1-2. Measurement of Insulation Resistance for Electrical Parts

Disconnect the lead wires of the desired electric part from terminal plate, switch, capacitor, etc. Similarly disconnect the connector. Then measure the insulation resistance.

(Figs. 2 to 3)

Refer to Electric Wiring Diagram.

NOTE

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

Power plug

Ground

Probe

Insulation tester

NOTE

The shape of the power plug may differ from that of the air conditioner which you are servicing.

Probe

Clip

Copper tube or metallic part

Insulation tester

From fan motor, compressor and other parts

Insulation tester

Fig. 1

Fig. 2

Fig. 3

Fig. 4