4. Service procedures
1
1
2
3
4
5
IV - 36
SM830080
4-2
Checking the Electrical Components
(1)
Measurement of Insulation
Resistance
• The insulation is in good condition if the
resistance exceeds 1 M
Ω
.
1
Power Supply Wires
Clamp the earthed wire of the Power Supply
wires with a lead clip of the insulation resis-
tance tester and measure the resistance by
placing a probe on either of the power wires.
(Fig. 25)
Then measure the resistance between the earthed
wire and the other power wire. (Fig. 25)
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 high voltage terminal on the
terminal plate (Fig. 26)
See Fig. 22.
3
Outdoor Unit (SPW-CR253GHL5)
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
1
and then
2
on the 8 or 6P terminal plate.
(Fig. 26)
See Fig. 22.
3
Outdoor Unit (SPW-CR253GHL8,
SPW-CR363GHL8, SPW-CR483GHL8)
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
5
and then
6
, and then
7
on the 8P terminal
plate. (Fig. 26)
See Fig. 23.
Fig. 25
Fig. 26
Copper
tube or
metallic part
Clip
Insulation
tester
Probe
Terminal plate
0639_X_S
Earthed wire
Clip
Probe
Insulation
tester
0638_X_S
