Checking Outdoor Controller - Samsung AR07CSDAFWKN Service Manual

Troubleshooting

4-6-3 Checking Outdoor Controller

1. Making sure the wire connections.
2. Checking AC(220~240V) line
Caution!
When you remove PBA, you have to check DC link Voltage. After Power off, DC link Voltage is so high!
3. Checking DC voltage on each point
AJ020BXJ2CH, AJ024BXJ3CH (INVERTER PBA)
Item Measuring point
DC LINK CE151 Voltage
Main control 15V CE161 Voltage
Main control 12V CE175 Voltage
Main control 5V CE174 Voltage
AJ***CXS*CH, AJ036BXJ4CH, AJ048BXJ5CH (MAIN PCB)
Item Measuring point
12V CE101Voltage
5V CE105 Voltage
4. Checking PFCM
Check Resistance between R and S
AJ020BXJ2CH, AJ024BXJ3CH
PFCM PFCM
R R
4-46
Nomal value
AC220V → 305~310Vdc
14.5V - 15.5V
10.8V - 13.2V
4.75V - 5.25V
Nomal value
10.8V - 13.2V
4.75V - 5.25V
AJ***CXS*CH, AJ036BXJ4CH, AJ048BXJ5CH (INVERTER PBA)
S S
Resistance
AJ***CXS*CH, AJ036BXJ4CH, AJ048BXJ5CH (INVERTER PCB)
Item
DC LINK
Main control 15V
Main control 12V CE157 Voltage
Main control 5V CE159 Voltage
R R S S
Measuring point Normal value
R - S over the hundreds ㏀
Measuring point Nomal value
CE151 Voltage AC220V → 305~310Vdc
CE158 Voltage 14.5V - 15.5V
10.8V - 13.2V
4.75V - 5.25V
Samsung Electronics