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Fault Checkup
Please check the following when consigning repair service:
Symptoms
Water flow sound
Cracking sound
Bad smell in outlet air
Flashing operating indicator
Awaiting indication
Idle indoor unit still has sound of
refrigerant flowing and radiating
temperatures.
Clicking sound when unit comes on.
Start or stop working automatically
Failure to work
• Poor cooling &heating effects
Under the following circumstances, immediately stop the operation, disconnect the manual supply switch and contact the
after-service personnel.
• When buttons are not flexible and actuated;
• When there are foreign objects or ice in the unit;
• When it cannot be operated after exiting the protection mode;
• When other abnormal conditions occur.
Reasons
Water flow sound can be heard during starting operation, during operation
or immediately after stopping operation. When it starts for 2-3 minutes, the
sound may become louder, which is the flowing sound of refrigerant or the
draining sound of condensate water.
During operation, the air conditioner may make a crackling sound, which
is caused from the temperature changes of the heat exchanger.
Clean filters and confirm the condensate drain pan and line
are clean and clear.
When switching it on again after power failure, turning on the manual
power switch will show the operating indicator flashes.
It displays the waiting indication as it fails to perform refrigerating operation
while other indoor units are in heating operation. When the operator set it to
the cooing or heating mode and the operation is opposite to the setting, it
displays the waiting indication.
To prevent oil and refrigerant from blocking the valve of idle units (off or
satisfied) while other indoor units are operating, some refrigerant flow is
allowed to pass through. This may result in some radiating temperature and
flow noise.
When the conditioner is powered on, the sound is made due to the
expansion valve resetting.
Check if it is set to Timer-ON and Timer-OFF.
Check if there is a power failure.
Check if the supply fuse and breaker are disconnected.
Check if the unit is displaying any faults.
Check if wait symbol is displayed. This is due to other indoor units
connected to the same outdoor unit are running in the opposite mode.
System cannot heat and cool simultaneously.
Check if air intake port and air outlet port of outdoor units are blocked.
Check if the door and windows are open.
Check if the filtering screen of the air cleaner is blocked with debris or dust.
Check if the fan setting is too low.
Check if the mode set to Fan mode.
Check if the temperature is set correctly.
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