Ι Ι Ι; Troubleshooting; Items To Be Checked First - Samsung AQ18A9(0)RCF Service Manual

Ι Ι Ι

Troubleshooting

1 Items to be checked first

1) The input voltage should be rating voltage 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 seven 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 a symptom not related to
the malfunction of the air conditioner.
No. Operation of air conditioner
The STD operation indicator, LED blinks when a power
1
plug of the indoor unit is plugged in at first.
In the Cool mode, the compressor does not operate at
a room temperature higher than the setting temperature
while the indoor fan operates.
2
In the Heat mode, the compressor does not operate at
a room temperature lower than the setting temperature
that indoor fan should operate.
The Fan speed operating is not allowed in the
3
Auto or Dry mode.
Compressor stops operating intermittently in the
4
Dry mode.
Compressor of the outdoor unit is operating
although it is turned off in the Heat mode.
5
Only timer LED of the indoor unit lights up and the air
6
conditioner does not operate.
The compressor and indoor fan stop intermittently in
7 the Heat mode.
Indoor fan and outdoor fan stop operating intermittently
in the Heat mode.
8
The compressor stops intermittently in the Cool mode
9 or Dry mode and the fan speed of the indoor unit
decreases.
4) Indoor unit observes operation condition of the air conditioner, and displays self diagnosis details
on the display panel.
No.
1
STD LED blinking (1Hz)
2
TIMER LED blinking (1Hz)
3 STD and TIMER LED blinking (1Hz)
4
BIO LED blinking (1Hz)
5
STD, BIO and TIMER LED blinking(1Hz)
6 All LED blinking(1Hz)
Display
It indicates power is on. The LED stops blinking if the operation
On/Off button on the remote control is pushed.
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 speed of the indoor fan is set to LL in the Dry mode.
Fan speed is five steps are selected automatically in the Auto mode.
Compressor operation is controlled automatically in the Dry
mode depending on the room temperature and humidity.
When the unit is turned off while de-ice is activated,
the compressor continues operating for up to 9 minutes
(maximum) until the deice is completed.
The Timer is being activated and the unit is in the ready mode.
The unit operates normally if the timer operation is cancelled.
The compressor and indoor fan stop intermittently if room
temperature exceeds a setting temperature in order to protect
the compressor from overheated air in a Heat mode.
The compressor operates in a reverse cycle to remove exterior
ice in the Heat mode, and indoor fan and outdoor fan do not
operate intermittently for within 20% of the total heater operation
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.
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 wasn't setup or option data error)
Explanation
Self Diagnosis
15