15
Troubleshooting
ΙΙΙΙΙΙ
1 Items to be checked first
1) The input voltage should be voltage rating within ±10% range.
The air conditioner may not operate properly if the voltage is out of this range.
2) Is the connection cable linking the indoor unit and the outdoor unit properly?
The indoor unit and the outdoor unit shall be linked by six cables.
Check the terminals if the indoor unit and outdoor unit are properly linked by the same number of cables.
Otherwise the air conditioner may not operate properly.
3) When a problem occurs due to the contents illustrated in the table below, it is not a symptom related
to the malfunction of the air conditioner.
4) Indoor unit observes operation condition of the air conditioner and displays self diagnosis on the
display panel.
No.
Operation of air conditioner
The STD operation indicator, LED blinks when a
power plug of the indoor unit is plugged in at first.
1
It indicates power is on. The LED stops blinking if the
operation On/Off button on the remote control is pushed.
In the Cool mode, the compressor does not operate
at a room temperature higher than the setting
temperature while the indoor fan operates.
2
3
4
5
It happens after three minutes when the compressor is
reoperated. The same phenomenon occurs when a power
is on. As a phenomenon that the compressor is
reoperated after three minutes, the indoor fan is adjusted
automatically with reference to a temperature of the air.
The Fan speed operating is not allowed in the Auto
or Dry mode.
The speed of the indoor fan is set to LL in the Dry mode.
The Fan speed is five steps are selected automatically in
the Auto mode.
Compressor stops operating intermittently in the Dry
mode.
The compressor is controlled automatically in the Dry
mode depending on the room temperature and humidity.
The compressor stops intermittently in the Cool or
Dry mode, and the fan speed of the indoor unit
decreases.
The compressor stops intermittently or the fan speed of the
indoor unit decreases to prevent inside/outside air from
freezing depending on the inside/outside air temperature.
Explanation
NO.
Display
STD LED blinking (1Hz)
TIMER LED blinking (1Hz)
STD and TIMER LED blinking (1Hz)
BIO LED blinking (1Hz)
STD, BIO and TIMER LED blinking(1Hz)
All LED blinking(1Hz)
1
2
3
4
5
6
Restore from power failure (input initial power)
Indoor unit Room sensor Error (open or short)
Indoor unit heat exchanger temperature sensor Error (open or short)
Indoor fan malfunctioning (for spead is below 450rpm)
EEPROM Error
Option Error (Option error wasn’t setup or option data error)
Self Diagnosis
AS18A5(6)RC_E 1/7/04 6:08 PM Page 15
