4. Service procedures
(2)Air conditioner does not operate
1Circuit 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 1MΩ or less, it is a defect of insulation.
(Example)
LCircuit
N breaker
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Power |
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supply |
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cords |
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Earth |
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23
4
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Interunit power line
Indoor unit
1
2
3
4
L1 Circuit
L2 breaker
L3
N
1
+ + +
+ Power
supply cords
Outdoor unit
51
72
84
3
23
4
+ |
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Interunit power line
Indoor unit
1
2
4
3
*Set the circuit breaker to OFF. | Earth |
1Remove power supply cords
from the terminal plate in | NO |
the outdoor unit. |
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•Check insulation resistance of power supply cords.
OK
2Remove interunit power line
from the terminal plate in | NO | |
the outdoor unit. | ||
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•Check insulation resistance of outdoor unit.
OK
3 Remove interunit power line | NO | |
from the terminal plate in | ||
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the indoor unit. |
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•Check insulation resistance of indoor unit.
OK
Interunit power lines are defective.
Execute
rewiring.
Insulation of outdoor unit is defective.
Insulation of outdoor unit is defective.
Execute
rewiring.
•Check insulation resistance of electrical parts
in the outdoor unit.
•Check insulation resistance of electrical parts
in the outdoor unit.
4
0613_X_S
SM830043
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