MALFUNCTION ANALYSIS
No power supply
Fuse is burned out
Supply voltage is too low
Switch is broken down
Switch is at the OFF position; or socket and plug is
loosened; or power wire has malfunction; or power failure
Replace the fuse
Inspect the supply voltage. If it is lower 10% of the rated
voltage, pleaselook for the reason, improve the
Check if optional switch (ON,OFF) is disconnected with the wire or it’s with mechanical failure; use the universal meter to 
check if contacts of the switch are conducting; if not, replace
it with a new one with the same model and specifi cation
A/C can’t run
Failure of crystal oscillator or reset circuit
The wire is loosened
Transformer is broken
Controller is broken
Receiver head is loosened
Receiver head is broken or it isn’t plugged well 
Replace those parts which have malfunction
Check the circuit and connect the wire according to the
electric diagram attached to the unit
Replace the transformer
Replace the controller
First press the “AUTO” button of the manual switch. If the button is normal, recheck if the installation and connection of head and lines are correct. If correct, replace receiving head or remote controller.
Remote controller has malfunction
A/C can run but it can’t cooling 
(or heating)
The thermostat hasn’t been adjusted well
Too much dust accumulated on the fi lter
Heat exchanger is blocked
Fan speed is set too slow
Lower the temperature of the thermostat (or increase the temperature when heating)
Clean the fi lter
Clean the dust accumulated on the surface of the heat
exchanger
Set the fan speed at high or medium fan speed
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| 1. Wrong wire connection; 2. whether the capacitor |
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| The fan can’t run or the fan speed is too slow |
| damaged or not; 3. the motor has malfunction; Connect the |
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| wire correctly or replace those parts which has malfunction. |
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