Samsung ACH1800E Technical Manual page 153

7
TROUBLE SHOOTING & ERROR MODE
Fault Diagnosis by Symptom
G EC05 : When the trouble is found in the communication related part between indoor unit and
outdoor unit.
- EA of 7-segment of outdoor unit PCB.
- Reservation lamp and filter lamp of wireless receiving board is flickering with 1 Hz.
- Action item when "*A" displays on the wired remote controller.
Check point :
↔
- Indoor unit outdoor unit mis-connection
- Indoor unit PCB defect
- Outdoor unit PCB defect
Are the terminals N1,L1,C of indoor unit and
outdoor unit are correctly connected? and is the
Is the LED of PCB flickering with 16Hz for
250ms and then repeating the on?
Is the LED of PCB flickering with 16Hz?
✽ "*" stands for the indoor unit address.
152 | SAMSUNG
set power on?
YES
NO
NO
Replace the PCB
(Cont.)
NO
Do connection correctly and check.
YES
Indoor unit communication norma
YES
The Micom of outdoor unit is operating normally,
check and replace the communication circuit of
outdoor unit and indoor unit.