Samsung MH18AP1(P2)-09 - Page 48

Troubleshooting
47Samsung Electronics
No
Check as in the procedure "No Power parts".
Refer to page 41.
Remove power cord and plug in again in approx. 5 seconds.
Micom (IC04) is faulty.
Is the operation icon( ) lamp
flickering with the sound of "ting"?
<MH26– ; Doesn't it flicker but come out
the sound of "ting"?>
Yes
Yes
Normal
" " sound heard from the indoor unit when ON/OFF button
on the remote control unit pushed?
6-3-7 If Operation by remote control unit is impossible. (Initial Diagnosis)
1. Troubleshooting procedure
No
Yes
Replace battery.
Voltage of battery less than 2.5V (Remote Control Unit)?
No
No
LCD is faulty.
LCD display status of REMOCON normal?
Yes
No
Replace button.
Transmission display lamp ( ) blinking when
ON/OFF button on the remote control unit pushed?
Yes
No
Micom is faulty.
Voltage at pin #30 of Remocon Micom change?
Yes
No
Q601(C4375Y) or Q602(C1623Y) is faulty.
IR LED(CL-1L5EU) is faulty.
Voltage at collector of Q601 or Q602 change?
Yes
No
Receiver module is faulty.
Voltage at pin #15 of micom (IC04) change (INDOOR UNIT)?
Yes
DB98_16045A(4)_1 1/29/04 4:57 PM Page 47