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7
Fault Checkup
Please check the following when consigning repair service:
All these are not problems
Symptoms Reasons
Water ow sound
Water ow sound can be heard when starting operation, during operation or
immediately after stopping operation. When it starts to work for 2-3 minutes,
the sound may become louder, which is the owing sound of refrigerant or
the draining sound of condensed water.
Cracking sound
During operation, the air conditioner may make the cracking sound, which
is caused from the temperature changes or the slight dilation of heat
exchanger.
Terrible smell in outlet air
The terrible smell, caused from walls, carpet, furniture, clothing, cigarette
and cosmetics, attaches on the conditioner.
Flashing operating indicator
When switching it on again after power failure, turn on the manual power
switch and the operating indicator ashes.
Awaiting indication
It displays the awaiting indication as it fails to perform refrigerating operation
while other indoor units are in heating operation. When the operator set it
to the refrigerating or heating mode and the operation is opposite to the
setting, it displays the awaiting indication.
Idle indoor unit still has sound of
refrigerant owing and radiating
temperatures.
To prevent oil and refrigerant from blocking the valve of idle units (off or
satised) while other indoor units are operating, some refrigerant ow is
allowed to pass through. This may result in some radiating temperature and
ow noise.
Clicking sound when unit comes on.
When the conditioner is powered on, the sound is made due to the resetting
of the expansion valve.
Please make another check.
Start or stop working automatically Check if it is in the state of Timer-ON and Timer-OFF.
Failure to work
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.
• Bad cooling & heating effects
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 ltering screen of air cleaner is blocked with sludge or dust.
Check if the setting of wind quantity is at low wind.
Check if the setting of operation is at the Fan Operation state.
Check if the temperature setting is proper.
Under the following circumstances, immediately stop the operation, disconnect the manual supply switch and contact the
after-service personnel.
• When buttons are inexible actuated;
• When fuse and breaker have been burnt over and over;
• When there are foreign objects and water in the refrigerator;
• When it cannot still be operated after removing the operation of protective unit;
• When other abnormal conditions occur.
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