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10. PHENOMENA NOT ATTRIBUTABLE TO
FAULTS OF AIR CONDITIONER
The following phenomena do not indicate exception of air
conditioner
The system does not run.
After pressing the ON/OFF button, the system does not run
immediately.
If the RUN indicator is on, it indicates the air conditioner runs in
the normal status.
It does not run immediately because the safety device in the
system is active to prevent overload.
Three minutes later, the air conditioner compressor will run
automatically.
If the RUN indicator and the Defrost/Preheat indicator are on, it
indicates you have selected the heating mode. At the beginning
after startup, since the compressor does not run, the tempera-
ture of the indoor unit is too low. See the chapter headed
"Cooling/Heating/Supply Air Operation Procedure".
The indoor unit gives out white aerosol
This phenomenon may occur when the indoor relative humidity
is too high and the unit runs in the cooling mode (in a place
where there is much oil mist or dust).
If the internal stain of the indoor unit is heavy, the temperature in
the room will be distributed unevenly. In this case, the interior of
the indoor unit must be cleaned.
Contact the local distributor or the aftersales service center of
manfacturer to inquire about the methods of cleaning the indoor
unit. This job must be performed by professional maintainers.
This phenomenon may also occur when the air conditioner
shifts from defrosting operation to heating operation.
That is because the moist generated by defrosting is expelled as
steam.
Noise of air conditioner
When the air conditioner runs in the cooling, dewetting or
heating mode automatically, grave continuous sizzles may
occur.
That is the sound of flow of refrigerant between the indoor unit
and the outdoor unit.
The sizzles may be heard shortly after the unit stops running or
when the unit runs in the defrost mode. That is the sound raised
because the refrigerant stops flowing or changes the volume of
flow.
Squeak may occur when the air conditioner starts or stops
running. That is the sound raised because the plastic assem-
blies inflate or deflate when the temperature changes.
Dust is blown out of the indoor unit.
When the air conditioner resumes service after a long period out
of service, the dust in the indoor unit will be blown out.
The indoor gives out smell
The indoor unit absorbs the smell of the room, furniture or
smoking, and gives it out when running.
Shift from cooling mode to air supply mode.
6
In order to prevent frosting of the indoor heat exchanger, the air
conditioner shifts to the air supply mode automatically, and
resumes to cooling mode in a short time.
When the room temperature decreases to the set temperature,
the air conditioner will shut down the compressor automatically,
and shifts to the air supply status. After the room temperature
rises, the compressor will restart. The action of the compressor
in the heating mode is the contrary.
11. FAULTS OF AIR CONDITIONER AND
CAUSE
If any of the following exceptions occurs, stop operation of the
air conditioner immediately. Turn off the power switch, and
contact the local aftersales service center of manfacturer:
The RUN indicator blinks quickly (2 blinks per second).
After turning off the power switch and then turning it on again,
that indicator still blinks quickly.
The receiving function of the remote controller fails, or the
start/shutdown operation is abnormal.
The fuse blows out frequently, or the circuit breaker protection
occurs frequently.
Foreign substance or moist enters the air conditioner.
The indoor unit leaks water.
Other exceptions occur.
If the air conditioner fails but does not meet the foregoing
phenomena obviously, check the system in the following
procedure:
Symptom
Possible causes
Power supply fails
The power switch is not
connected
The
system
The fuse blows out or
does
the circult breaker
not run
snaps of
The remote controller or
the wire controller fails
The air
The set temperature is
conditioner
improper
sends air
out but
3-minute protection of
cannot
the compressor
provide cool
air at all
Table 11-1
Way of handling
Operate it after power
supply resumes
Connect the power
supply properly.
Replace the fuse or
check whether
electric leakage
occurs.
Check the remote
controller or wire
controller.
The set temperature is
lower than the room
temperature during the
cooling. Or the set
temperature is higher
than the room tempera-
ture during the heating.
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