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Please check the following when consigning repair service:
Symptoms Reasons
All these are not problems
• 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
• 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.
• Sound in
• shutdown indoor
• unit or white
• steam or cold air
To prevent oil and refrigerant from blocking the shutdown indoor units,
refrigerant ows in the short time and make the sounds of refrigerant
owing. 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.
• Failure to work
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.
• 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.
During operation, the air conditioner may make the cracking sound,
which is caused from the temperature changes or the slight dilation of
heat exchanger.
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 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.
Please make another check.
• Clicking sound when switching
the air condition on
• Start or stop working
automatically
7.9.3 Fault Checkup
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