Samsung ACH2400C Service Manual page 38

EC17 : When the trouble is found on the part related to ventilator of indoor unit.
Check point :
- Indoor unit PCB ↔ ventilator connector wire, output voltage of indoor unit micom pin No. 5
- Ventilator, DC 12V power, DC5V power, indoor unit option switch.
Is the wire correctly connected between indoor unit and outdoor unit?
after check of shot circuit between indoor unit and ventilator wire, start the wind control and check the
indoor fan and then start the test.
Is the output DC112V, DC5V normal?
Is the option switch 1 of indoor unit off?
Is IC06 pin no. 7 "HIGH"?
Is IC06 pin no. 10 "LOW"?
Is the voltage across RY77 normal?
Is the voltage of CN6 no.1 and 3 of indoor unit
AC208V~AC230V?
Check and replace ventilator
YES
YES
YES
YES
YES
YES
NO
Check and replace IC01, IC02
NO
Put off and then reset the power
NO
Replace micom
NO
Check and replace IC06
NO
Check and replace RY77
NO
Replace indoor unit PCB
Trouble Shooting
37