37MGHAQ: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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When troubles occur, please check the following points before contacting a repair company.
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 period 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 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
THE UNIT STARTS AND
STOPS FREQUENTLY
System circuit is blocked Determine which circuit is blocked and replace the mal-
functioning piece of equipment
There’s too much or too little refrigerant in the system Check for leaks and recharge the system with refriger-
ant
Incompressible gas or moisture has entered the sys-
tem
Evacuate 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
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 lower than 7°C (44.5°F) Check for leaks and recharge the system with refriger-
ant
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 refrig-
erant
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