45MUAAQ: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Table 6 — Other Issues
When troubles occur, check the following points before contacting a repair company.
NOTE: If the problem persists after performing checks and diagnostics above, turn off your unit immediately and contact an authorized
service center.
The design and specifications are subject to change without prior notice for product improvement. Consult with the sales agency or manufacturer for
details. Any updates to the manual will be uploaded to the service website, please check for the latest version.
Problem Possible Causes Solution
Poor Cooling Performance
Temperature setting may be higher than ambient room temperature Lower the temperature setting
The heat exchanger on the indoor or outdoor unit is dirty Clean the affected 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
Too many sources of heat in the room (people, computers,
electronics, etc.)
Reduce amount of heat sources
Low refrigerant due to leak or long-term use Check for leaks, re-seal if necessary and top off refrigerant
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-minutes protection has been activated Wait three minutes after restarting the unit
Timer is activated Turn timer off
The unit starts and stops
frequently
There is too much or too little refrigerant in the system Check for leaks and recharge the system with refrigerant.
Incompressible gas or moisture has entered the 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
Poor heating performance
The outdoor temperature is extremely low Use auxiliary heating device
Cold air is entering through doors and windows Make sure that all doors and windows are closed during use
Low refrigerant due to leak or long-term use Check for leaks, re-seal if necessary and top off refrigerant
Indicator lamps continue flashing
Error code appears and begins
with the letters as the following in
the window display of indoor unit:
• E(x), P(x), F(x)
• EH(xx), EL(xx), EC(xx)
• PH(xx), PL(xx), PC(xx)
The unit may stop operation or continue to run safely. If the indicator lamps continue to flash or error codes appear, wait for about 10
minutes. The problem may resolve itself.
If not, disconnect the power, then connect it again. Turn the unit on.
If the problem persists, disconnect the power and contact your nearest customer service center.
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