Air Conditioner Does Not Operate - Sanyo STW-2 Series Technical & Service Manual

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 2MΩ or less, insulation is defective ("NO").
STW-2 series air conditioner
WARNING
*
Set circuit breaker to OFF.
1 Pull the power plug out of the
wall outlet.
Measure insulation resistance
•
of unit.
NOTE
1. If any inadequately 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 other defective part.
2. Replace defective part with new one.
Power plug
Wall outlet
(208/230V model only)
(Receptacle)
1
NO
43
Power
Circuit
supply
breaker
Ground
Insulation of
unit is
defective.
Measure insulation
•
resistance of electrical
parts.
(Example)
Compressor, Fan motor,
Capacitor, Relay, etc.