Samsung ACH2400C, Service Manual

Page: 32 / 74

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EC11 : When the trouble is found on the part related to the fan motor of indoor unit.
31
Trouble Shooting
Check point :
- Defect of PCB relay of indoor unit.
- Output of indoor unit Micom
- Indoor fan motor defect
- Defect of PCB IC06 of indoor unit
NO
Check the replay part
and replace
NO
NO
NO
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Normal
Check micom and
replace
Check micom and
replace
Check micom and
replace
Check IC06 and
replace
Replace PCB
Is the power source normal? AC208~230 60Hz
Is the wire harness for motor connection good?
Is the terminal contact of fan motor condenser good?
During the wind control, does it change
to breeze, mild and strong wind?
Is he output pin of micom high when
selecting each wind control mode?
When selecting the each wind control
mode, is the voltage across the replay of
indoor unit PCB 12V?
When selecting each wind control of
micom, are the pin 14 and 15 of indoor
unit PCB IC06 low?
Is the voltage across the indoor unit fan
AC208~230V?
Check the indoor unit fan motor
and replace
When changing the wind to breeze,
mild and storing, do RY73, RY74,
RY75 operate?
DB81-00206A(3)-1 3/28/02 5:43 PM Page 31