Samsung ACH1800E Technical Manual page 163

7
TROUBLE SHOOTING & ERROR MODE
Fault Diagnosis by Symptom
G EC15 : When the trouble is found on the part related to drain pump of indoor unit.
Check point :
- Indoor unit PCB ↔ Drain pump connector wire, indoor unit Micom No.6 Pin output, IC06 No.6 Pin output.
- Drain pump, RY72, DC12V power, AC220~240V 50Hz power, indoor unit option switch.
Check to confirm whether the wire is connected correctly
between indoor unit and outdoor unit?
After checking of the shortage for the connector wire between
indoor unit and drain pump, operate it for cooling, and check-
ing compressor and then test it.
Is normal the DC12V, DC5V output of indoor unit?
Is switch on the No.2, No.3 option switch of indoor unit?
Is "LOW" the No.6 pin output of IC04?
Is "HIGH" the No.11 pin output of IC06?
Is DC12V the relay both voltage of RY72?
Is AC220V~AC240V of the No.1, No3 pin
Check the drain pump and replace.
162 | SAMSUNG
(Cont.)
both voltage of CN5.
NO
Check IC01, IC02 and
replace.
NO
Reset the power
after turn on.
NO
Check IC06 and replace.
NO
Replace of indoor unit
micom
NO
Relace the RY72
NO
Replace the indoor PCB.