Checking Electrical Components 12-1 Measurement Of Insulation Resistance - Argoclima AER522QC Technical Data & Service Manual

12. CHECKING ELECTRICAL COMPONENTS
12-1. Measurement of Insulation
Resistance
The insulation is in good condition if the resistance
exceeds 1MΩ.
12-1-1. Power Supply Wires
Clamp the ground wire of the power supply wires with
the lead clip of the insulation resistance tester and
measure the resistance by placing a probe on either of
the power wires. (Fig.12-1)
Then measure the resistance between the ground wire
and the other power wire. (Fig.12-1)
12-1-2. 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.12-2)
12-1-3. 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.12-3 and 12-4)
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.
Probe
Clip
Copper
tube or
metallic part
Clip
Copper
tube or
metallic part
Metallic
part
Clip
42
Ground wire
Clip
Insulation
tester
Terminal plate
Insulation
tester
Insulation
tester
From fan motor,
compressor and
other parts
Probe
Insulation
tester
Fig.12-1
Probe
Fig.12-2
Probe
Fig.12-3
Fig.12-4