Samsung ACH1800E Technical Manual - page 150
SAMSUNG | 149
TROUBLE SHOOTING & ERROR MODE
7
Fault Diagnosis by Symptom
7-5. Fault Diagnosis by Symptom
● EC01 : Trouble on the thermistor related part of indoor unit.
• EC01 : Trouble on the room thermistor related part of indoor unit.
- E1 of outdoor unit PCB 7-segment
- Reservation lamp of wireless receiving board is flickering with 1 Hz.
- Action items when “*1” displays on the wired remote controller.
✽ “*” stands for the indoor unit address.
● EC02 : Trouble on the pipe thermistor related part of indoor unit.
- E5 of outdoor unit PCB 7-segment.
- Reservation lamp of wireless receiving board is flickering with 1 Hz.
- Action items when “*5” displays on the wired remote controller.
NO
YES
YES
Replace the indoor unit PCB
NO
Is the voltage across the thermistor 4.9V and
above or 0.5V and lower?
Replace the thermistor
Indoor the indoor unit thermistor at CN8
Indoor unit thermistor installed at CN8?
- Defect of indoor unit
- Indoor unit thermistor defect
Check point :
- Indoor unit PCB defect
- Indoor unit pipe thermistor defect
Check point :
YES
YES
Replace the indoor unit PCB
NO
NO
Is the voltage across thermistor 4.9V and higher
or 0.5V lower?
Replace the thermistor
Is the indoor unit pipe thermistor installed at CN8?
Install the indoor unit pipe thermistor at CN8