Replace Pcb Module - Samsung AQ18A9(0)RCF Service Manual

4. When the UP/DOWN Louver Motor Does Not Operate - Initial Diagnosis
4. When the UP/DOWN Louver Motor Does Not Operate - Initial Diagnosis
1) Checklist :
(1) Is input voltage normal?(voltage rating within ±10% range)
(2) Is the UP/DOWN louver motor properly connected with the connector (CN61)?
2) Troubleshooting procedure
Remove the power cord and plug it in again in approx.
five seconds.
Does the STD lamp blink?
Does it start operating when you push the swing button
of the remote control?
Is voltage of #1~#4 of Micom (ICO4)
change?(Squarewave)
Is voltage of pin #10, #15 and #16 of IC06 (KID65003)
change?(Squarewave)
UP/DOWN louver motor is abnormal.
5. When there is no warm air in the current mode
5. When there is no warm air in the current mode
1) Checklist :
(1) Is the set temperature of Remote Control lower than room temperature in the Heat mode?
(2) Is the Indoor PCB properly connected with the CN78 connector?
2) Troubleshooting procedure
After training on, the Heating starts in
five minutes.
Is the number #7 of Micom (IC04) DC 4.8 V?
Is the number #12 of IC06 (KID65003) LOW?
Is voltage rating between CN71 #5 and CN78 #1
within ±10% range?
4 way valve of the outdoor unit or
connection cable is abnormal.
Replace 4 way valve
Check connection cable
YES
NO
YES
YES
YES
NO
NO
YES
NO
YES
NO
YES
NO Check as the procedure
"No Power". Refer to page 16.
YES
Normal
NO
Micom (IC04) is abnormal.
NO
Driver IC06(KID65003) or IC06 is abnormal.
Normal
Micom is abnormal.
IC07 is abnormal
RY73 is abnormal

Replace PCB module

Refer to page 21
19