Sanyo CL1852 - Manual (Page 48)

45
9-2. Air Conditioner Does Not Operate
9-2-1. Circuit breaker trips (or fuse blows)
A. When the circuit breaker is set to ON, it is tripped soon. (Resetting is not possible.)
● There is a possibility of ground fault.
● Check insulation resistance.
If resistance value is 1M
½
or less, insulation is defective (“NO”).
B. Circuit breaker trips in several minutes after turning the air conditioner on.
● There is a possibility of short circuit.
1
Indoor
unit
Ground
1
2
Outdoor
unit 2 1
5
Circuit
breaker
4
5
4
1
2
Power
supply
Inter-unit
power wiring
Measure insulation
resistance of electrical
parts in outdoor unit.
NO
NO
Set circuit breaker to OFF. *
Measure insulation
resistance of electrical
parts in indoor unit.
1 Remove both power supply wires
and inter-unit wires from terminal
plate in outdoor unit.
Measure insulation resistance
of outdoor unit.
•
2 Remove inter-unit wires from
terminal plate in indoor unit.
Measure insulation resistance
of indoor unit.
•
•
•
Insulation of
outdoor unit
is defective.
Insulation of
indoor unit
is defective.
WARNING
Check capacity of circuit breaker.
Capacity of circuit breaker is
suitable.
•
Replace with suitable
one (larger capacity).
•
Measure resistance of compressor
motor winding. •
Measure resistance of outdoor fan
motor winding. •
NO
099-464 SM (17-56) 2/7/00 4:19 PM Page 45