6
5
. Troubleshooting
Troubleshooting
No power supply
Power switch is point at 'OFF' position; or socket
and plug are loosened; or there's malfunction for
the power supply circuit; or power failure
Fuse is burnt out
Replace the fuse
Supply voltage is too low
Inspect the suppy voltage. If it is lower 10% of the rated
voltage, please find out the reason, improve the power
supply condition and add regulated power supply
Switch is broken
Check whether the switch is conducted with universal meter,
if not, please replace the switch with the same model and
specification
Temperature controller is broken down
When the temperature controller is at the low notch,
compressor won’t startup
,p
lease check whether the
contact is conducted with universal meter, if the contact
of temperature controller still hasn’t been conducted when
the outdoor temperature is high, please replace the
temperature controller.
Wires are loosened or poor connection
Connect the wire correctly according to the electric
circuit diagram on the body
Temperature controller hasn't been adjusted
properly
Adjust the temperature of temperature controller lower
Too much dust on the filter
Clean the filter
Heat exchanger is blocked
Clean the dust accumulated on the surface of heat exchanger
The fan speed is set too low
Set the fan speed at low or medium fan speed
Fan can't run or fan speed is low
1. Wrong wire connection; 2. whether the capacitor
is open circuit or short circuit; 3.malfunction of the motor;
4. malfunction of the main switch.
Connect the wire correctly or replace those parts with
malfunction
Refrigerant is insufficient or leaking
Check leakage, carry out vacuum-pumping
after
repai
ring leakage and charge refrigerant
according to requirements
Cooling system is blocked
Check whether the system is blocked by
observing the condensation of the evaporator
and the pressure value of the highpressure
manonmeter, and then take measures to deal with the system.
A/C can run but
can't cooling
A/C can't run
