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7. TROUBLE SHOOTING
1) Error Code 1(Er)
1 Check the connector of room air thermistor. (or connecting wire)
2Check soldering of connecting on control P.C.B. (Error of soldering or short)
3Check 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