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Table 5-4
Symptoms
Unit does not start
Air flowing normally but
completely can't cooling
Units start or stop frequently
Low cooling effect
Low heating effect
5.2. T roubles and causes of wire controller
Before asking for serving or repairing , check the following points. (Refer to Table 5-5)
Table 5-5
Symptoms
The fan speed can not be
changed.
The wire controller signal is
not transmitted even when
the ON/OFF button is pushed.
The TEMP. indicator does
not come on.
The indication on the display
disappears after a lapse of
time.
The TIMER ON indicator
goes off after a lapse of
certain time.
No receiving tone sounds
from the indoor unit even
when the ON/OFF button is
pressed.
Causes
Power failure.
Power switch is off.
Fuse of power switch may have burned.
Batteries of remote controller exhausted
or other problem of controller.
Temperature is not set correctly.
Be
in
3
minutes
protection
compressor.
Refrigerant is too little or too much.
Air or no concretingc gas in the
refrigerating circuit.
Compressor is malfunction.
Voltage is too high or too low.
System circuit is blocked.
Outdoor unit and indoor unit heat
exchanger is dirty.
The air filter is dirty.
Inlet/outlet of indoor/outdoor units is
blocked.
Doors and windows are open
Sunlight directly shine.
Too much heat resource.
Outdoor temp. is too high.
Leakage of refrigerant or lack of
refrigerant.
Outdoor temperature is lower than 7 C
Doors and windows not completely
closed.
Leakage of refrigerant or
lack of
refrigerant.
Solution
Check whether the MODE
indicated on the display is
"AUTO"
Check whether the MODE
indicated on the display is
"DRY"
Check whether the signal
transmitter of the wire
controller is properly directed
to the infrared signal receiver
of the indoor unit.
Check whether the MODE
indicated on the display is
FAN ONLY
Check whether the timer
operation has come to an
end when the TIMER OFF
is indicated on the display.
Check whether the timer
operation is started when
the
TIMER ON
is indicated
on the display.
Check whether the signal
transmitter of the wire
controller is properly directed
to the infrared signal receiver
of the indoor unit when the
ON/OFF button is pressed.
63
Solution
Wait for the comeback of power.
Switch on the power.
ReplLocation:
Replace the batterises or check the
controller.
Set the temperature properly.
Wait.
of
Check leakage, and rightly recharge
refrigerant.
Vacuum and recharge refrigerant.
Maintenance or change compressor.
Install manostat.
Find reasons and solution.
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 and rightly recharge
refrigerant.
Use heating device.
Close doors and windows.
Check leakage and rightly recharge
refrigerant.
Causes
When the automatic mode is
selected, the air conditioner will
automatically change the fan
speed.
When dry operation is selected,
the air conditioner automatically
change the fan speed. The fan
speed can be selected during
"COOL" , "FAN ONLY", and "HEAT"
The power supply is off.
The temperature cannot be set during
FAN mode.
The air conditioner operation will
stop up to the set time
Up to the set time, the
air conditioner will automatically
start and the appropriate
indicator will go off.
Directly transmit the signal transmitter of
the wire controller to the
infrared signal receiver of the
indoor unit, and then repeatly
push the ON/OFF button twice.
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