Samsung AQ09A5(6)MAF Service Manual page 21

6. When the remote control does not operate
6. When the remote control does not operate
1) Troubleshooting procedure
Remove the power cord and plug it in again approx. five Seconds
Does STD lamp blink?
The melody sounds from the indoor unit when you
push the On/Off button on the remote control?
Is voltage of battery less than 2.5V (Remote Control Unit)?
Is LCD display status of the remote control normal?
Does the transmission indicator in the display blink
when you push the On/Off button on the remote control?
Is voltage of #15(IC04) of remote control of Micom changed?
Is voltage at collector of Q601 or Q602 changed?
Is voltage of #20 of Micom (IC04) changed (Indoor unit)?
Micom (IC04) is abnormal.
NO
YES
YES
NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
YES
NO
Check as the procedure "No Power"
Refer to page14
Normal
Replace the battery
LCD is abnormal.
Replace button
Micom is abnormal.
Q601(2SC2412K) or Q602(2SC2412K) is
abnormal. IR LED(CL-1L5EU) is
abnormal.
Receiver module is abnormal.
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