2
.
TROUBLESHOOTING
When the air conditioner failure occurs, the fault code will display on control board, wired controller or
display panel.
How to check fault codes
Indoor unit
(1) Fault codes indicated by wired controller
MODEL: HCWA21NEHH
FIG.1 Fault code displays on wired controller
Error code
Error indicator
COOL
ALARM
GROUP
2. Troubleshooting
2.1 Trouble guide
Troubleshooting for normal malfunction
Troubleshooting
Possible Reasons of Abnormality
How to Deal With
Air conditioner can not start up
1. Power supply failure;
2. Trip of breaker or blow of fuse
；
3
.
Power voltage is too low;
4. Improper setting of remote
controller ;
5. Remote controller is short of
power.
1. Check power supply circuit;
2. Measure insulation resistance to
ground to see if there is any
leakage;
3. Check if there is a defective contact
or leak current in the power supply
circuit;
4. Check and set remote
controller
again;
5. Change batteries.
The compressor starts or stops
frequently
The air inlet and outle t have
been blocked.
Remove obstacles.
Poor cooling/heating
1. The outdoor heat exchanger is dirty,
such as condenser;
2. There are heating devices indoors
;
3. The air tightness is not enough, and
people come in and out too
frequently;
4. Block of outdoor heat e xchanger;
5.
1. Clean the heat e xchanger of the
outdoor unit, such as condenser ;
2. Remove heating devices;
3. Keep certain air tightness indoors;
4. Remove block obstacles;
5. Check and try to set temperature
again.
Sound from deforming parts
It is not abnormal, and the sound will
disappear soon.
Water leakage
1. Drainage pipe is blocked or broken;
2. Wrap of refrigerant pipe joint is not
closed completely.
1. Change drainage pipe;
2. Re-wrap and make it tight.
Improper setting of temperature.
During system starting or stopping, a
sound might be heard.However, this is
due to the
normal deformation of
plastic parts.
Troubleshooting according to fault codes
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