Trouble Shooting - Daewoo DWC-121R Service Manual

7. TROUBLE SHOOTING

Self-Diagnostic Function
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."
Unit Not Run
The power is applied to the unit
Check the voltage between "POWER
"RL1
Check the unit display
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
and
4 " of Main P .C.B
Rating voltage more than 90%
is all off?
Yes
Rating voltage
1 "
under 90%
No
No
18
Check the
Breaker or Fuse
Self Diagnostic
function is ON
Yes
Check according to
self Diagnostic function
Main P .C.B defect
No