Samsung AS12SGGE Training Manual page 95

8
TROUBLESHOOTING
Troubleshooting for Non Inverter Heat Pump
When the UP/DOWN Louver Moter Does Not Operate. (Initial Diagnosis)
1) Checklist :
(1) Is input voltage normal? (the rating voltage ±10% range)
(2) Is the UP/DOWN louver motor properly connected with the connector (CN61)?
2) Troubleshooting procedure
Remove power cord and plug in again in approx. 5 seconds.
Does operation start when swing button of the
Voltage at pin #57~#60 of micom (ICO4) change?(Squarewave)
Volatge at pin #16 of IC06 (ULN2003A) and #10~#12 of
IC08 (ULN2003A) change?(Squarewave)
In the Heat mode, When there is no warm air current. Check this first;
(1) Is the set temperature of Remote Control lower than room temperature in Heat mode?
(2) Is the Indoor PCB properly connected with the CN71 and CN78 connector?
After training on, the heating operation
Is the nunber #38 of Micom (IC04) DC 4.8 V?
Is the munber #11 of IC05 (ULN2003A) LOW?
Is the voltage between CN71 #5 and CN78 #1 the rating voltage ±10% range?
Abnormal 4way valve of Outdoor Unit.
4 way valve should be replaced
94 | SAMSUNG
Is OPERATION lamp blinking?
YES
remote control unit pushed?
NO
YES
YES
UP/DOWN louver motor is faulty.
should start in five minutes.
NO
YES
YES
YES
or connecting Cable
or connecting Cable Check.
(12K)
(Cont.)
NO
Check as in the procedure
"No Power parts".
YES
Normal
NO
Micom (IC04) is faulty.
NO
Driver IC06/08 (ULN2003A) or IC06 is faulty.
YES
Normal
NO
Abnormal Micom
NO
Abnormal IC05
NO
Abnormal RY73
Refer to replace PCB module