7-2. Air conditioner does not operate.
7-2-1. 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 2M
Ω
or less, insulation is defective (“NO”).
1. If any poorly insulated part is found, exclude that part from circuit with other parts properly connected, and then
measure insulation resistance of entire air conditioner again to locate defective part.
2. Replace defective part with new one.
NOTE
Measure insulation
resistance of electrical
parts.
(Example)
Compressor, Fan motor,
Capacitor, Relay etc.
NO
Set circuit breaker to OFF.
*
1
Pull the power plug out of the
wall outlet.
Measure insulation resistance
of unit.
•
•
Insulation of
unit is
defective.
WARNING
Window type air conditioner
Wall outlet
(Receptacle)
Power
supply
Circuit
breaker
Ground
1
Power plug
(Field supply)
14
