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7.2 The air conditioner does not work
7.2.1 Leakage protector is open or fuse is burnt.
A. Setting leakage protector to “ON”, it opens immediately (can not reset).
There is possibility of ground fault.
Check insulation resistance (The insulation resistance shall be more than 2M
Ω
).
B. Leakage protector is
OFF.
C. The fuse is open in several minutes after turning air conditioner on.
7.2.2 The indoor and outdoor units do not work.
Check the rated power of fuse.
Check the resistance of indoor fan motor coil.
Check the resistance of transformer coil.
Replace it with a proper one
Replace indoor fan motor.
Replace transformer.
No
No
No
Yes
Yes
Disconnect unit wires from terminal block of
outdoor unit. And measure insulation
resistance of outdoor unit.
Poor insulation performance
No
Measure the insulation resistance of
the electric parts of outdoor unit.
Disconnect unit wires from terminal block of
indoor unit. Unplug the unit and measure
the insulation resistance of indoor unit.
No
Measure the insulation resistance of
the electric parts of outdoor unit.
Poor insulation performance
Check power supply.
Check if something residue cover on
transmitting part of the remote controller.
1. Power failure
2. Check the breaker.
Clean it
.
Check if infrared receiver on indoor unit is dirt.
Clean it.
Check fuse on indoor PCB Ass’ y.
Check the resistance of indoor fan motor coil.
Parts of indoor PCB Ass’ y or
switches are defective.
Measure the resistance of power transformer.
No
No
No
No
Yes
Yes
Yes
Yes
Measure the resistance of compressor coil.