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Power voltage is too low, causing AC uneasy
to start and shut down after starting, or fuse be
burned out etc.
Select high wind speed but indoor temperature
still at high side, air flow from the air outlet is
too weak.
Select high wind speed, the vibration and
sound of unit are severe.
Temperature controller adjusts improper and
max cooling capacity is not utilized
completely, thus indoor temperature can't
lower down.
As for Heat pump air conditioner heating
effect is not ideal during cold winter, this is
normal phenomenon.
Improper installation will lead to
indoortemperature uneven or bad cooling
effect.
11.5.2 It means there is failure if following phenomenon is happened
Phenomenon
Mirage comes out from indoor unit
Noise
Sometimes, the room is smelly
when heating, there is no wind at the
beginning of starting unit
The unit has auto-restart function, when it is repowered again, unit will run as setting mode.
Note: closed default
It is not malfunction, need to find out the causing, if the causing is the electricity net
voltage is too low, user should load a power manostat to keep voltage between 220V-
380V for AC normally running
It is because air filter is too dirty or blocked making cooling capacity fail to be brought by
air flow, causing cooling capacity inadequate. Take out filter and wash, the problem will
be solved.
Fan runs at high speed, severe vibration and sound of unit is normal phenomenon
Adjust the temperature controller, and problem will be solved.
The lowest temperature is －7℃ when heating, below this temperature unit cannot heat
effectively.
It is necessary to adjust AC installation position
When the cold air from AC cools the indoor air
●When air conditioner stops running, there will be some noise,
and this is because the refrigerant flows contrarily.
●AC expand or shrink according to temperature, causing harsh sounds
●Liquid sound is from refrigerant flowing
●The AC itself will not be smelly, if it is smelly, it is because
environment smell accumulated
● Solution: clean the filter
● It is to prevent cold air blowing, please be patient
● The unit has auto-restart function, when it is repowered again, unit will run
according to the mode which is set before the power off. (Note: default is closed)
Causing explanation
49 | S e r v i c e M a n u a l
TRUBLESHOOTING
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