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Trouble shooting
Breaker tripped or fuse
burnt out
When set the breaker to ON, it will
trip off at once.
Test the insulative resistance for
earthing, to confirm whether unit
is current leakage or not
When turn on the unit, the breaker
will trip in a few minutes
Check the breaker and test
the resistance.
No power supply
Check the circuit
The power plug is not connected
well or poor connected.
Check and insert the plug tightly
Wrong wire connection between the
indoor unit and outdoor unit.
According to the electric diagram to
check the wire and connect correctly
Malfunction of wireless remote control Check the wireless remote control
Fuse of controller was burnt out
Replace the fuse of controller
Whether the wire connection between strong
current board and light current board of the contr-
oller is firmed ?
Please fix the connection wire firmly
Both indoor unit and
outdoor unit can't
start up
Is the transformer output wire
connected well, is there voltage output?
Please fix connection wire firmly,
check output voltage
Air conditioner can not start up
Is the setting temp. suitable?
Adjust the setting temp.
Is COOL(HEAT) load suitable?
To check the pretested COOL(HEAT)load
Poor COOL(HEAT) operation
Malfunction of
refrigerant flow
Malfunction of 4-way valve
Replace the 4-way valve
Short of
refrigerant volume Charge the refrigerant
Malfunction of compressor
Replace the compressor
Short of valve gate flow volume
To open the valve gate adequately
Short of air volume
Air filter were blocked
Clean the filter
Fan speed was set too slow
To set the fan speed to high or
middle speed
Outdoor unit installation place is
improper
Outdoor unit should be install in a place with well
ventilation, and should be installed the awning.
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