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TROUBLESHOOTING
Please check the following when consigning repair service:
Symptoms
Running water noise
Cracking sound
Unpleasant odor in outlet air
All of these are
not problems.
Flashing operating indicator
Waiting indicator
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
Please make
another ckeck.
Check if there is
a power failure.
Poor cooling & heating
effects
Under the following circumstances, immediately stop the operation, disconnect the manual supply switch and contact the
after-service personnel.
•
When control buttons are inoperable
•
When circuit breakers trip repeatedly
•
When the outdoor unit is blocked with ice or foreign objects.
•
When the system fails to restart after power reset.
•
When system operates abnormally
31-5000755 Rev. 0
Reasons
Water running sound can be heard during starting operation, during operation or immediately
after stopping. The running water sound may become louder 2-3 minutes after the unit starts.
The sound is refrigerant circulating inside the system.
During operation, the air conditioner may make a crackling sound. This is caused from the
temperature changes of the heat exchanger.
The terrible smell may be caused from organic materials from walls, carpeting, furniture,
cigarette smoke and cosmetics that collect on the outside of the refrigerant coil.
When switching it on again after power failure, turning on the manual power switch will show the
operating indicator flashes.
Displayed when the control is set it to the cooing or heating mode and the current mode of
operation is opposite to the requested setting.
Some refrigerant flow is allowed to pass through idle indoor units to prevent oil and refrigerant
from blocking the metering valve. This flow may result in some radiating temperature and noise.
The sound is made due to the expansion valve resetting when the unit is powered on
Check to see if the system operation is being controlled by the timer function.
Timer - ON and Timer - OFF
Check if there is a power failure.
Check if the power supply fuse or breaker are open.
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 that are running in the opposite mode.
System can heat and cool simultaneously under heat recovery mode.
Check if outdoor fan intake or outlet grilles are blocked.
Check if doors and windows are open.
Check if the air filter is blocked with debris or dust.
Check if the fan setting is too low.
Check if the system mode is set to FAN mode.
Check if the temperature is set correctly.
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