–
43
–
4
(2)
Air conditioner does not operate
1
1
1
1
1
Circuit breaker trips (or fuse blows).
(a) When the circuit breaker is set to ON, it is tripped soon.
• There is a possibility of ground fault.
• Check insulation resistance.
If resistance value is 1M
Ω
or less, it is a defect of insulation.
1
2
3
(Example)
*Set the circuit breaker to OFF.
Remove power supply cords
from the terminal plate in
the outdoor unit.
• Check insulation resistance
of power supply cords.
OK
NO
NO
Insulation of
outdoor unit
is defective.
Execute
rewiring.
Remove interunit power line
from the terminal plate in
the outdoor unit.
• Check insulation resistance
of outdoor unit.
OK
Remove interunit power line
from the terminal plate in
the indoor unit.
• Check insulation resistance
of indoor unit.
OK
Interunit power lines are
defective.
NO
Insulation of
outdoor unit
is defective.
• Check insulation
resistance of
electrical parts
in the outdoor unit.
• Check insulation
resistance of
electrical parts
in the outdoor unit.
Execute
rewiring.
0613_X_S
+
+
+
+
+
+
1
3
2
Circuit
breaker
Outdoor
unit
5 1
6 2
3
4
Indoor
unit
1
2
3
4
Power
supply
cords
Interunit
power line
L
N
Earth
+
+
+
+
+
+
+
+
1
3
2
Circuit
breaker
Indoor
unit
1
2
Power
supply
cords
Interunit
power line
L1
L2
L3
N
Earth
4
+
+
+
+
4
Outdoor
unit
5 1
6
7 2
4
3
8
4
3
4. SERVICE PROCEDURES
