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6
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 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 owing sound of refrigerant or the
draining sound of condensate water.
Cracking sound
During operation, the air conditioner may make a crackling sound, which
is caused from the temperature changes of the heat exchanger.
Terrible smell in outlet air
The terrible smell may be caused from walls, carpet, furniture, clothing,
cigarette and cosmetics, that attach to the air conditioner.
Flashing operating indicator
When switching it on again after power failure, turning on the manual
power switch will show the operating indicator ashes.
Awaiting indication
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.
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
expansion valve resetting.
Please make another check.
Start or stop working automatically Check if it is set to 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 air lter is blocked with sludge or dust.
Check if the setting of fan speed is set to low speed.
Check if the setting in in Fan Operation state.
Check if the temperature setting is correct.
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 or ice in the unit.;
• When system won't run after resetting power and waiting for 3-minute time out;
• When other abnormal conditions occur.
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