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4.9.4 Fault checkup
Please check the following when consigning repair service:
Symptoms
Water flow sound
Cracking sound
Terrible smell in outlet air
Flashing operating indicator
Awaiting indication
Sound in shutdown indoor
unit or white steam or cold air
Clicking sound when
switching
the air condition on
Start or stop working
automatically
Failure to work
Bad 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 inflexible 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.
Reasons
Water flow 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 flowing sound of refrigerant or
the draining sound of condensed water.
During operation, the air conditioner may make the cracking sound, which
is caused from the temperature changes or the slight dilation of heat
exchanger.
The terrible smell, caused from walls, carpet, furniture, clothing, cigarette
and cosmetics, attaches on the conditioner.
When switching it on again after power failure, turn on the manual power
switch and the operating indicator flashes.
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.
To prevent oil and refrigerant from blocking the shutdown indoor units,
refrigerant flows in the short time and make the sounds of refrigerant
flowing. Otherwise, when other indoor units perform heating operation,
white steam may occur; during refrigerating operation, cold air may appear.
When the conditioner is powered on, the sound is made due to the resetting
of the expansion valve.
Check if it is in the state of Timer-ON and Timer-OFF.
Check if there is a power failure.
Check if the manual power switch is turned off.
Check if the supply fuse and breaker are disconnected.
Check if the protective unit is working.
Check if refrigerating and heating functions are selected simultaneously
with the awaiting indication on line control.
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 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.
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