Samsung IDH1800E Service Manual page 98

EC18 : When the trouble is found on the part related to power system of output unit.
Check point :
- Outdoor unit AC220V~AC240V input power, DC12V output, DC5V output
- Power transformer, F101, F701
Check to confirm whether the wire is connected
correctly between indoor unit and outdoor unit?
Is the voltage between CN71 pin no. 3 and TB1
AC220V~AC24V?
YES
No trouble on F101, F701?
YES
DC12V output?
YES
DC5V output?
YES
No trouble on the outdoor unit power system and
finish the test
Samsung Electronics
NO
Check power code and replace PCB
NO
Replace fuse
NO
NO
Check and replace IC02
Check and replace power
transformer
NO
No check on power
transformer AC?
YES
Check and replace IC01
Trouble Shooting
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