AUKS AL-H18/4DR1(U), Service Manual

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AUKS DC Inverter 1 Drive1 50HZ R410A Trouble shooting
114
3. Poor efficiency explanation
During the process of using air conditioner, some phenomenon seems to be malfunction but actually not.
Thus when cooling effect does not
achieve
to your expectation, the following factors have to be
ruled out
Phenomenon Causing explanation
High outside temperature and too many
indoor individuals, even air conditioner runs
at full-load operation, the wind blowing out
from air outlet is cold, but it is difficult to lower
the
indoor temperature, this is not
malfunction.
When the outdoor temperature is higher, more heat penetrates into
indoor space, which increases the cooling load of AC. If there are too
many individuals(for example 10 individuals) and every individual gives
off 120W, totally 1200W, this will running out of half of AC cooling
capacity, and the unit’s cooling capacity this time is far from enough,
indoor temperature is hard to lower down. It is normal phenomenon and
do not mean useless of AC.
Power voltage is too low, causing AC uneasy
to start and shut down after starting, or fuse
be burned out etc. 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
Select high wind speed but indoor
temperature still at high side, air flow from the
air outlet is too weak.
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.
Select high wind speed, the vibration and
sound of unit are severe. Fan runs at high speed, severe vibration and sound of unit is normal
phenomenon
Temperature controller adjusts improper and
max
cooling capacity is not utilized
completely, thus indoor temperature can’t
lower down.
Adjust the temperature controller, and problem will be solved.
As for Heat pump air conditioner heating
effect is not ideal during cold winter, this is
normal phenomenon.
The lowest temperature is － 7 ℃ when heating, below this temperature
unit cannot heat effectively.
Improper installation will lead to indoor
temperature uneven or bad cooling effect.
It is necessary to adjust AC installation position
4. Failure phenomenon
Phenomenon Causing explanation
Mirage comes out from indoor
unit
When the cold air from AC cools the indoor air
Noise
1. When air conditioner stops running, there will be some noise, and this is because the
refrigerant flows contrarily.
2. AC expand or shrink according to temperature, causing harsh sounds
3. Liquid sound is from refrigerant flowing
Sometimes, the room is
smelly
1. The AC itself will not be smelly, if it is smelly, it is because environment smell
accumulated
2. Solution: clean the filter
when heating, there is no
wind at the beginning of
starting unit 1. It is to prevent cold air blowing, please be patient
2. 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)