Samsung SH09ZS8 - Page 95

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Troubleshooting for Non Inverter Heat Pump (12K) (Cont.)
◆ 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
◆ 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?
Remove power cord and plug in again in approx. 5 seconds.
Is OPERATION lamp blinking?
YES
NO
NO
YES
NO
NO
YES
YES
Does operation start when swing button of the
remote control unit pushed?
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)
UP/DOWN louver motor is faulty.
Driver IC06/08 (ULN2003A) or IC06 is faulty.
Micom (IC04) is faulty.
Normal
Check as in the procedure
"No Power parts".
After training on, the heating operation
should start in five minutes.
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.
or connecting Cable
4 way valve should be replaced
or connecting Cable Check.
NO
YES
YES
YES
NO
NO
NO
YES
Normal
Abnormal Micom
Abnormal IC05
Abnormal RY73
Refer to replace PCB module
TROUBLESHOOTING
DB98_08187A(1)_57~100 3/27/03 2:24 PM Page 94