Air Handlers
24
“Malfunction”
Reason
The unit emits noise.
Slight cracking sound
is heard when just
turned on.
It is noise when electronic
expansion valve initialization.
There is consecutive
sound when cooling.
That's sound for gas
refrigerant flowing in the unit.
There is sound when
unit starts or stops.
That's sound for gas
refrigerant stops flowing.
There is slight and
consecutive sound
when unit is running
or after running.
That's sound for operation of
drainage system.
The unit blows out dust.
When unit runs after
no operation for a
long period.
Dust in indoor unit is blew out.
The unit emits odor.
Operating.
The room odor absorbed by
the unit is blew out again.
Indoor unit still runs after
switch off.
After every indoor unit
receive "stop" signal,
fan will keep running.
Indoor fan can be set as “ON”
or “AUTO” mode. Under “ON”
mode, indoor fan will keep
running after switch off the
unit.
There are LED indicators on the main board of the indoor unit, which are used to
display the operating status and malfunction information of the unit.
LED indicator
Color
Function
Power Indicator
Red
Indoor unit main board is powered on,
Power Indicator is on.
Running Indicator
Green
After detecting the indoor fan turn-on
signal, the running indicator light is on,
when detecting the indoor fan turning-off
signal, the running indicator light is off.
When detecting a system failure, the
running indicator light flashes.
Different running indicator flashing light means different system failure.
malfunction
Running Indicator status
Remark
Indoor Jumper cap failure
Light out 3S then flash
once
Flash means light on
0.5S then light out 0.5S
Indoor fan failure
Light out 3S then flash
twice
Indoor tube temperature
sensor failure
Light out 3S then flash
four times
