Samsung ACH1800E Technical Manual page 158

Fault Diagnosis by Symptom
G EC10 : When the trouble is found on the part related to the wired remote controller.
(single operation)
Check point :
- Defect of communication line between indoor unit and wired remote controller.
- Output of indoor unit Micom
- Defect of wired remote controller PCB
- Indoor unit PCB defect
Is the wired remote
controller energized when the
power is reset?
YES
Is the on/off button command of
wired remote controller reflected
on the set?
YES
When the power is applied
again after removing the power
at the operation on, does the
previous status display on the
wired remote controller
display window?
YES
Does the error code display?
NO
Check the main PCB of indoor
unit and replace it.
(Cont.)
NO NO
Is CN20 of indoor
unit main PCB
inserted?
YES
NO
Is the address
of indoor unit "0"
More than on indoor
unit mounted on the
wired remote
controller?
NO
NO
Are the terminals R1, R2, R3 of wired
remote controlled connected to the R1, R2,
R3 of indoor unit terminal boards?
YES
NO
Connect correctly the R1, R2, R3
Error correction and recheck
TROUBLE SHOOTING & ERROR MODE
CN20
insertion
Is the wire of CN15 to
indoor unit terminal
board shorted?
NO
NO
Set to "0"
YES
One unit is
installed
YES
Check the indoor
7
YES
Replace the
wiring
unit PCB
SAMSUNG | 157