Troubleshooting; Basic Items For Trouble Shooting - Samsung SH09BWHA Service Manual

6. 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).

6-1 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.
No Phenomena
1
The operation is not done.
2
The wind comes out but the
heating/cooling is not performed.
3
The remote control does not
operate.
4
The wind volume is not adjusted.
5
The temperature is not set.
6
The operation lamp continues to be
flickering.
7
The immediate operation starts
without control of remote control
when plugged
18
• Is the power off or the power unplugged?
• Does it stop because it is the completion time?
• Unplug and plug again the power source for 2 minutes.
• Is the filter clogged with dust or dirty?
• Is there any direct light on the outdoor unit or any obstacle against it?
• Is the selected temperature too high?
Lower the selected temperature lower than the current one (during cooling).
• Is the selected temperature too low?
Raise the desired temperature than the current one? (during heating)
• Is the "Fan only Mode" operation?
• Is the battery run out?
• Is the battery inserted in the wrong way(+, -)?
• Is the detection part of the indoor unit blocked?
• Does it interfered with the radio of neon sign?
• Is the operation selected among one of Auto / Dry / Turbo / Sleeping?
• The temperature setting is not required since the wind volume set automatically.
• Check again at the state of Cooling / Fan only / Heating.
• Is the operation selected among the Dry / Turbo / Sleeping / Fan only Mode.
Since the temperature is automatically set, the temperature setting is not required.
• Check again at the cooling / heating state.
• The standard temperature ±2˚C during the automatic operation.
• Push the Operation / Stop button.
• Unplug and plug the power source.
• It is the case that the auto restart function works.
Auto restart function is the convenient function where the operation state is
memorized in the Memory IC during the blackout and the operation restarts when
the power comes back.
Cause and reason
Samsung Electronics