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7.1.3 Outdoor unit
Clamp a metallic part of the unit 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)
7.1.4 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. (Fig. 3 and 4)
7.2 Checking continuity of fuse on PCB ass”y
Remove the PCB ass’ y from the electrical component box. Then
pull out the fuse from the PCB ass’ y. (Fig. 5)
Check for continuity using a multimeter as shown in Fig. 6
7.3 Checking motor capacitor
Remove the lead wires from the capacitor terminals, and then
place a probe on the capacitor terminals as shown in Fig. 7.
Observe the deflection of the pointer setting the resistance
measuring range of the multimeter to the maximum value.
The capacitor is “good” if the pointer bounces to a great extent
and then gradually returns to its original position.
The range of deflection and deflection time differ according to the
capacity of the capacitor.
Refer to electric wiring diagram.
If the probe can’ t enter the poles because
the hole is too narrow then use a probe with
a thinner pin.
Note:
