Service manual

37
3)AIR CONDITIONER DOES NOT OPERATE
(a)Circuit breaker trips (or fuse blows)
•When circuit breaker is set to ON, it trips in a few moments. (Resetting is not possible).
•Measure insulation resistance there is a possibility of ground fault. If resistance value is 1MΩ or less,
insulation is defective.
Circuit
breaker
Outdoor
unit
1
2
3
4
5
6
7
8
Unità
esterna
x
x
3
4
5
6
7
8
Unità
esterna
x x
x x
x x
x x
x x
x x
x x
Indoor
unit
1
2
3
4
5
6
7
8
Ground
Power
supply
Inter-unit
control wiring
a b c
d
ADR522HW / AE522SH
z
Inter-unit
power wiring
Circuit
breaker
Outdoor
unit
1
2
z
4
5
6
7
8
Unitx
x
x
x
Unità
esterna
x x
x x
x x
x x
x x
x x
x x
Indoor
unit
1
2
3
4
5
6
7
8
Power supply
wiring
a b c
d
ADR522HW - AE522SH3-AER522SH3
L1
L2
L3
N
z
z
1
2
3
4
5
6
Ground
z
Inter-unit
control wiring
Inter-unit
power wiring