Samsung AQV12, AQV12F2VE-BOL Troubleshooting
5. Troubleshooting
Since the inverter air conditioner is equipped with Electrical control circuits at both Indoor & outdoor unit, the trouble shooting shall be performed according to the error mode.
Inside the controller of the outdoor unit (inverter), the large capacity of electrolytic condenser so that it takes the time to discharge after the power off since the electrical charge remains
(the charging voltage DC 340V).
Take care of the electrical shock by contact on the charging part before the discharge after the power off. (It takes approximately 2 minutes to discharge).
5-1 Basic items for trouble shooting
1)Is the power source proper?
The power source shall be in the range of the rated voltage ±10%. If it is out of this range, it may cause the abnormal operation.
2)Is the connection made between the indoor and outdoor unit?
The connection between indoor and outdoor unit shall be performed with 4 wire. (connection cable of indoor and outdoor unit + ground wire).
3) The phenomena as follows are not out of order.
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Phenomena |
Cause and reason |
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1 |
The operation is not done. |
• Is the power off or the power unplugged? |
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• Does it stop because it is the completion time? |
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• Unplug and plug again the power source for 2 minutes. |
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2 |
The wind comes out but the |
• Is the filter clogged with dust or dirty? |
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heating/cooling is not |
• Is there any direct light on the outdoor unit or any obstacle against it? |
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performed. |
• Is the selected temperature too high? Lower the selected temperature lower than the cur- |
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rent one (during cooling). |
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• Is the selected temperature too low? Raise the desired temperature than the current one? |
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• Is the “Fan only Mode” operation? |
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3 |
The remote controller does |
• Is the battery run out? |
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not operate. |
• Is the battery inserted in the wrong way(+, -)? |
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• Is the detection part of the indoor unit blocked? |
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• Does it interfered with the radio of neon sign? |
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4 |
The wind volume is not |
• Is the operation selected among one of Auto / Dry / Turbo / Sleeping? |
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adjusted. |
• The temperature setting is not required since the wind volume set automatically. |
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• Check again at the state of Cooling / Fan only / Heating. |
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5 |
The reservation does not |
• Is the current time input? The reservation can be made only when the current time is input. |
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operate. |
• Is it on the stop condition? The reservation can not be made at the stop state. Press the |
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Operation / Stop button to make the reservation. |
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6 |
The temperature is not set. |
• Is the operation selected among the Dry / Turbo / Sleeping / Fan only Mode. |
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Since the temperature is automatically set, the temperature setting is not required. |
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• Check again at the cooling/heating state. |
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• The standard temperature ±2˚C during the automatic operation. |
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7 |
The operation lamp continues |
• Push the Operation / Stop button. |
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to be flickering. |
• Unplug and plug the power source. |
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8 |
The immediate operation starts |
• It is the case that the auto restart function works. |
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without control of remote |
# Auto restart function is the convenient function where the operation state is memorized in |
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controller when plugged |
the Memory IC during the blackout and the operation restarts when the power comes back. |
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Samsung Electronics |
5-1 |
5-2 The first determination method of troubled part
5-2-1 Error mode display of indoor unit
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Error mode |
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Opera- |
Defrost |
Reserva- |
Power monitor |
Fan |
Turbo |
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tion |
tion |
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X |
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X |
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Operation off |
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X |
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Power reset |
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X |
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X |
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Trouble of indoor temperature sensor (open/short) |
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X |
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Temperature sensor trouble of the indoor heat exchanger |
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(open/short) |
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X |
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X |
X |
X |
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Stuck of the indoor fan motor (trouble of rotation) |
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Trouble of outdoor unit temperature sensor |
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X |
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X |
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X |
- Discharge temperature sensor |
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- OLP temperature sensor of COMP top |
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- Defrost temperature sensor |
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- Outdoor temperature sensor |
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Communication trouble between the indoor and outdoor units |
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X |
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X |
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X |
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(Misconnection or circuit trouble of the indoor and outdoor |
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units) |
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X |
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Abnormal increase of the operation current |
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X |
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X |
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Occurring of the inverter circuit instantaneous over current. |
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X |
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X |
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Abnormal increase of the COMP. Top and discharge gas temper- |
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ature. |
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LAMP |
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Refrigerant Refill operation (test operation) |
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ON |
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(Lamp status) |
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Lamp flickering |
X: Lamp off |
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5-2 |
Samsung Electronics |
Troubleshooting
5-2-2 Error mode display of outdoor unit board
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ERROR MODE |
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RED |
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GREEN |
YELLOW |
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X |
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Operation off |
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Indoor-outdoor unit normal communication and operation |
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Abnormal communication between the indoor and outdoor unit |
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X |
X |
(miconnection or trouble of circuit between the indoor and outdor |
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unit) |
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X |
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Trouble of the control power of the outdoor(+12V) |
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X |
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Instantaneous over current of inverter circuit |
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X |
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Abnormal increase of the discharge temperature |
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X |
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Abnormal increase of operation current |
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Abnormal increase of comp top temperature. |
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Trouble of outdoor temperature sensor (open/short) |
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Trouble of the OLP temperature sensor (open/short) |
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Trouble of outdoor Heat exchanger temperature sensor (defrost tem- |
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perature sensor) (open/short) |
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(LAMP |
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: LAMP ON |
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LAMP FLICKERING |
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X : LAMP OFF |
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Samsung Electronics |
5-3 |
5-3 Sequence of trouble shooting for inverter aircon
OPERTION START
. The indoor unit does not work even though the power is plugged.
. There is no sound “ting”
. The lamp is not on the display.
The indoor unit does not work when operated by the remocon.
The lamp of the indoor display lamp is flickering and the indoor unit stops several minutes after the indoor unit starts.
Check the indoor unit control board. (A)
Checking the Remocon. (B)
Check the control board and the display board of indoor unit.(C)
Check the error mode by confirming the lamp flickering of indoor unit display.(D~N)
Reservation |
lamp( |
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flickering |
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-> Check of the indoor temperature sensor (D) |
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Operation( |
), Reservation( |
lamp flickering -> |
Check of the indoor heat exchanger (E) |
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Fan( |
lamp flickering |
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-> |
Check of indoor unit fan motor (F) |
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Reservation( |
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Fan( |
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lamp flickering |
-> Check the lines of the indoor and outdoor |
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communication (G) |
Operation( |
), Fan |
lamp flickering |
-> |
Check of the outdoor unit temperature sensor |
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: Discharge temperature sensor (H) |
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: Comp top OLP temperature sensor (I) |
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: Defrost temperature sensor (J) |
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: Outdoor temperature sensor (K) |
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Turbo |
lamp( |
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flickering |
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-> |
Check of the abnormal increase protection |
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of the operation Current (L) |
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Reservation( |
), |
Turbo( |
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) lamp |
-> |
Check of the instantaneous over-current protection |
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flickering |
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mode of inverter circuit (M) |
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Fan( |
), Turbo lamp( |
) flickering |
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Check the abnormal increase of the comp top and |
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discharge gas temperature protection mode.(N) |
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Check the indoor unit
Check of the Communication line
Check of the Outdoor unit
5-4 |
Samsung Electronics |
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