Samsung ACH1800E Technical Manual page 159

7
TROUBLE SHOOTING & ERROR MODE
Fault Diagnosis by Symptom
G EC11 : When the trouble is found on the part related to the fan motor of indoor unit.
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
Is the power source normal? AC220 ~ 240 50Hz
Is the wire harness for motor connection good?
Is the terminal contact of fan motor condenser good?
YES
mode, is the voltage across the replay of
158 | SAMSUNG
YES
During the wind control, does it change
to breeze, weak, strong and auto wind?
NO
When changing the wind to
breeze, weak, strong and auto,
do RY73, RY74, RY75 operate?
NO
Is he output pin of micom high when
selecting each wind control mode?
YES
When selecting the each wind control
indoor unit PCB 12V?
YES
When selecting each wind control of
micom, are the pin 14 and 15 of indoor
unit PCB IC06 low?
YES
Is the voltage across the indoor unit fan
AC220 ~ 240V?
YES
Check the indoor unit fan motor
and replace
(Cont.)
NO
NO
NO
NO
NO
NO
NO
Check the replay part
and replace
Normal
Check micom and
replace
Check micom and
replace
Check micom and
replace
Check IC06 and
replace
Replace PCB