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MALFUNCTION ANALYSIS
Switch is broken down
Transformer is broken
Fuse is burned out
No power supply
Failure of crystal oscillator or reset circuit
Controller is broken
The thermostat hasn’t been adjusted well
Receiver head is broken or it isn’t plugged well
Heat exchanger is blocked
Supply voltage is too low
The wire is loosened
A/C can’t run
A/C can run but
it can’t cooling
(or heating)
Receiver head is loosened
Too much dust accumulated on the fi lter
Remote controller has malfunction
Fan speed is set too slow
The fan can’t run or the fan speed is too slow
Switch is at the OFF position; or socket and plug is
loosened; or power wire has malfunction; or power failure
Inspect the supply voltage. If it is lower 10% of the rated
voltage, pleaselook for the reason, improve the
Check the circuit and connect the wire according to the
electric diagram attached to the unit
Lower the temperature of the thermostat
(or increase the temperature when heating)
Clean the dust accumulated on the surface of the heat
exchanger
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
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.
1. Wrong wire connection; 2. whether the capacitor
damaged or not; 3. the motor has malfunction; Connect the
wire correctly or replace those parts which has malfunction.
Replace the fuse
Replace the transformer
Replace the controller
Clean the fi lter
Set the fan speed at high or medium fan speed
Replace those parts which have malfunction