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Multi Split Type Air Conditioner / User Manual
9 Troubleshooting
9�2 Troubleshooting tips
When troubles occur, please check the following points before contacting a repair company.
Problem Possible Causes Solution
The unit is not
working
Power failure Wait for the power to be restored
The power is turned off Turn on the power
The fuse is burned out Replace the fuse
Remote control batteries are dead Replace batteries
The Unit’s 3-minute protection has
been activated
Wait three minutes after restarting the unit
Poor cooling
performance
Temperature setting may be higher
than the ambient room temperature
Lower the temperature setting
The heat exchanger on the indoor or
outdoor unit is dirty
Clean the a ected heat exchanger
The air filter is dirty
Remove the filter and clean it according to
instructions
The air inlet or outlet of either unit is
blocked Turn the unit off, remove the obstruction and turn
it back on
Doors and windows are open
Make sure that all doors and windows are closed
while operating the unit
Excessive heat is generated by
sunlight Close windows and curtains during periods of high
heat or bright sunshine
Low refrigerant due to leak or long-
term use Check for leaks, re-seal if necessary and top off
refrigerant
The unit starts
and stops
frequently
There’s too much or too little
refrigerant in the system Check for leaks and recharge the system with
refrigerant
There is air, incompressible gas or
foreign material in the refrigeration
system.
Evacuate and recharge the system with refrigerant
System circuit is blocked
Determine which circuit is blocked and replace the
malfunctioning piece of equipment
The compressor is broken Replace the compressor
The voltage is too high or too low Install a manostat to regulate the voltage