Samsung IDH1800E Service Manual page 83

Trouble Shooting
EC03 : When the trouble is found on the part related to the outdoor unit thermistor.
- E6 of outdoor unit PCB 7-segment
- Operation lamp and filter lamp of wireless receiving board are flickering with 1Hz.
- Action items when "*6" displays on the wired remote controller.
Check point :
- Defect of indoor unit
- Indoor unit thermistor defect
Is the outdoor unit thermistor installed at CN41?
YES
Is the voltage across the thermistor 4.9V and
higher or 0.5V and lower?
YES
Replace the thermistor
"*" stands for the indoor unit address.
6-4
NO
Install the outdoor unit thermistor at CN41.
NO
Replace the outdoor unit PCB
Samsung Electronics