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Problem
Solution
If the defrost mode is started or stopped, you will hear
the sound of refrigerant cooling in the reverse direction.
The indoor unit cannot blow air.
In HEAT mode, when the temperature of the indoor heat
exchanger is low, the airfl ow is stopped within 2 minutes
in order to prevent cold air.
In HEAT mode, when the outdoor temperature is low
or the outdoor humidity is high, frost will be formed
on the outdoor heat exchanger. The unit will defrost
automatically and the indoor unit will stop blowing air for
3-12 minutes.
In DRY mode, the indoor fan will stop blowing air for
3-12 minutes in order to avoid condensing water being
vaporised again.
In defrost mode, water or vapour may be emitted.
Moisture on air outlet.
If the unit operates at high humidity for a long time,
moisture will be generated on the grill of the air outlet.
C5: Malfunction of connector jumper.
Check if the connector jumper contacts properly. If
necessary, replace the old circuit board with a new circuit
board.
F1: Malfunction of indoor ambient temperature sensor.
Check if the indoor room temperature sensor is
connected properly.
F2: Malfunction of evaporator temperature sensor.
Check if the evaporator temperature sensor is connected
properly.
There is harsh sound during operation.
Immediately stop operation, disconnect the unit from the
power supply and contact an authorised service centre.
Strong odours are emitted during operation.
Immediately stop operation, disconnect the unit from the
power supply and contact an authorised service centre.
Water is leaking from the indoor unit.
Immediately stop operation, disconnect the unit from the
power supply and contact an authorised service centre.
The air switch or protection switch often interrupts power
supply.
Immediately stop operation, disconnect the unit from the
power supply
Water or other liquid is splashed into the unit.
Immediately stop operation, disconnect the unit from the
power supply and contact an authorised service centre.
Mains cord and mains plug are overheated.
Immediately stop operation, disconnect the unit from the
power supply and contact an authorised service centre.
OPERATION TIPS
Cooling operation
Air conditioners absorb heat from indoor and
transmit the heat to the outdoor unit in order to
decrease the room temperature. The cooling
capacity will increase or decrease according to
the outdoor temperature.
Anti-freezing function
If the unit is in COOL mode and in a low ambient
temperature, frost will be formed on the heat
exchanger of the indoor unit. If the temperature
of the heat exchanger decreases below zero,
the compressor will stop operation to protect
the unit.
Heating operation
Air conditioners absorb heat from outdoor and
transmit the heat to the indoor unit in order to
increase the room temperature. The heating
capacity will increase or decrease according to
the outdoor temperature.
Defrosting
• If the outdoor temperature is low and the
outdoor humidity is high, frost will form on
the outdoor unit during extended operation.
The heating capacity will decrease. The unit
may stop operation during defrosting.
• During defrosting, the fan motors of the
