Daewoo ROOM AIR CONDITIONER DWC-121R - Manual (Page 19)

18
7. TROUBLE SHOOTING
1) Error Code 1(Er)
1 Check the connector of room air thermistor. (or connecting wire)
2 Check soldering of connecting on control P.C.B. (Error of soldering or short)
3 Check the resistance of room air thermistor.
“Press the temperature Keys (Up & Down), Error code is displayed.”
Self-Diagnostic Function
The power is applied to the unit
Check the voltage between “POWER ”
and
“RL1 ” of Main P.C.B 4
1
Check the
Breaker or Fuse
Self Diagnostic
function is ON
Check according to
self Diagnostic function
Main P.C.B defect
Check the unit display
is all off?
Press the ON/OFF button of
Remote Control or Front Panel
Is the unit display all off?
Pull out the power plug
and then insert the power plug
after 5 second
Main P.C.B is normal
Recheck from the beginning
Rating voltage more than 90%
Rating voltage
under 90%
No No
No
Yes
Yes
Unit Not Run