Samsung AD18A1C09, Service Manual

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3. Troubleshooting
3-1 Items to be checked first
1) Is the voltage of the power correct?
The input voltage shall be the rating Voltage ± 10% range.
The airconditioner may not operate properly if the voltage is out of this range.
2) Is the link cable linking the indoor unit and the outdoor unit linked properly?
The indoor unit and the outdoor unit shall be linked by 4 cables.
Check the terminals if the indoor unit and outdoor unit are properly linked by the same number of
cables.
Otherwise the airconditioner may not operate properly.
3) When a problem occurs due to the contents illustrated in the table below it is a symptom not relat-
ed to the malfunction of the airconditioner.
4) Indoor unit observes operation condition of the air conditioner, and displays self diagnosis details
on the display panel.
NO
Operation of air conditioner
1 The COOL operation indication LED (Green) blinks for 3minutes
when a power plug of the outdoor unit is plugged in for the first
time.
2 In a COOL operation mode, the compressor does not operate at a
room temperature lower than the setting temperature.
In a HEAT operation mode, the compressor does not operate at a
room temperature higher than the setting temperature.
3 Fan speed setting is not allowed in AUTO or DRY mode.
4 Compressor stops operation intermittently in DRY mode.
5 Compressor of the outdoor unit is operating although the indoor
unit is turned off in a HEAT mode.
6 Timer LED only of the indoor unit lights up and the
air conditioner does not operate.
7 The compressor and indoor fan stop intermittently in HEAT
mode.
8 Indoor fan and outdoor fan stop operation intermittently in
a HEAT mode.
9 The compressor stops intermittently in a COOL mode or DRY
mode, and fan speed of the indoor unit decreases.
It indicates power is on. The LED stops blinking if the operation ON/OFF
button on the remote control unit is pushed.
The speed of the indoor fan is set to LL in DRY mode.
Fan speed is 5 steps is selected automatically in AUTO mode.
Compressor operation is controlled automatically in DRY mode depend-
ing on the room temperature and humidity.
When the unit is turned off while de-ice is activated, the compressor
continues operation for up to 12 minutes (maximum) until the deice is
completed.
Timer is being activated and the unit is in 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
being overheated in a HEAT mode.
The compressor operates in a reverse cycle to remove exterior ice in a
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 indoor heat exchanger from being frozen.
Explanation
NO
Display
Operating Timer Fan Turbo
X
X
X
X
X
X
X
X
X
X
X
X
X
(GREEN)
X
(GREEN)
X
X
(GREEN)
(GREEN)
1
2
3
4
5
6
7
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 speed is below 450rpm)
In case that the communication between the indoor unit and outdoor unit is not made for 60 seconds
Outdoor sensor Error (open or short)
- Outdoor sensor
- Pipe sensor A, B
The malfunction ot 4way valve in heat mode operation.
Self Diagnosis
: Lamp blinking X : Lamp OFF
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