Air Handlers
22
Following circumstances are not malfunction.
“Malfunction”
Reason
Unit doesn’t run.
When unit is started
immediately after it is just
turned off.
Overload protection switch
makes it run after 3 minutes
delay.
When power is turned on.
Standby operating for about 1
minute.
Mist comes from
the unit.
Under cooling.
Indoor high humidity air is
cooled rapidly.
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.
