Installation & Owner’s Manual
11
fig.9-4
table 10-1
10. TROUBLESHOOTING
10.1 Troubles and causes of air conditioner
If one of the following malfunctions occur, stop operation, shut
off the power, and contact with your dealer.
If the system does not properly operate except the above
mentioned cases or the above mentioned malfunctions is evident,
investigate the system according to the following procedures.
(see in table 10-1)
The operation lamp is flashing rapidly (five times per second),
you disconnect the unit with the power and then connect the unit
with the power again after two or three minutes but the lamps still
flash.
Switch operations are erratic.
The fuse is blown frequently or the circuit breaker is tripped
frequently.
Foreign matter or water has fallen inside the air conditioner.
Water leaks from the indoor unit.
Other malfunctions.
Symptoms
Causes
Solution
Unit does not start
Power failure.
Power switch is off.
Fuse of power switch may have burned.
Batteries of remote controller exhausted
or other problem of controller.
Wait for the comeback of power.
Switch on the power.
Replace the fuse.
Replace the batteries or check the
controller.
Air flowing normally but completely
can't cooling
Temperature is not setted correctly.
Set the temperature properly.
Units start or stop frequently
Air or no concreting gas in the watering
circuit.
three-way valve is malfunction.
Voltage is too high or too low.
System circuit is blocked.
Temperature is not setted correctly.
Vacuum.
Maintenance or change three-way
valve.
Install manostat.
Find reasons and solution.
Low cooling effect
Indoor unit heat exchanger is dirty.
The air filter is dirty.
Inlet/outlet of indoor units is blocked.
Doors and windows are open.
Sunlight directly shine.
Too much heat resource.
Leakage of water.
Clean the heat exchanger.
Clean the air filter.
Eliminate all dirties and make air
smooth.
Close doors and windows.
Make curtains in order to shelter from
sunshine.
Reduce heat source.
AC cooling capacity reduces (normal).
Check leakage.
Low heating effect
Doors and windows not completely
closed.
Leakage of water.
Use heating device.
Close doors and windows.
Check leakage.