Samsung AD18A1C09, Service Manual

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3-2-6 If Operation by Remote Controller Unit is Impossible.(Initial Diagnosis)
Remove power cord and plug in again approx. 5 Seconds
Is operation lamp blinking?
Check as in the procedure ÒNO Power partsÓ.
Refer to page 12.
Normal
Replace battery.
LCD is faulty.
Replace button.
Micom is faulty.
Receiver module is faulty.
Q601(C4375Y) or Q602(C1623Y) is faulty.
IR LED(CL-1L5EU) is faulty.
Ò Ò sound heard from the indoor unit when ON/OFF but-
ton on the remote control unit pushed?
Voltage of battery less than 2.5V (Remote Control Unit)?
LCD display status of REMOCON normal?
Voltage at PIN #30 of Remocon Micom change?
Voltage at collecter of Q601 or Q602 change?
Voltage at pin #26 of micom (IC04) change (INDOOR UNIT)?
Micom (IC04) is faulty.
N
Y
Y
N
N
N
N
N
Y
Y
Y
Y
Y
N
N
Y
Transmission display lamp ( ) blinking when ON/OFF
button on the remote control unit pushed?
1) Troubleshooting procedure
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