Samsung IDH1800E Service Manual page 84

Trouble Shooting
EC04 : When the trouble is found on the drain pump and float switch installed on the
indoor unit.
EC01 : Trouble on the thermistor related part of indoor unit.
- E9 of 7-segment of outdoor unit PCB
- Reservation lamp of wireless receiving board and filter lamp are flickering with 1 Hz.
- Action item when "*9" displays on the wireless remote controller.
Check point :
- Indoor unit defect
- Drain pump, float switch defect
Start
Is available drain
pump?
NO
NO
SW2 ON?
YES
SET SW2 OFF
SET SW3 OFF
POWER RESET
"*" stands for the indoor unit address.
Samsung Electronics
YES YES
SW2 ON?
Replace PCB
SET SW2 OFF
SET SW3 OFF
YES
Is available float
SW?
Install float SW
Check the
YES float SW
SW3 ON? Replace
indoor unit
PCB
6-5