Samsung MH052FUEA Service Manual page 89

4-5-2 Checking Outdoor Controller
1. Making sure the wire connections.
Caution! When you remove PBA, you have to check DC link Voltage. After Power off, DC link Voltage is so high!
2. Checking AC(220~240V) line
3. Checking DC voltage on each point
RJ040F2HXEA/RJ050F2HXEA
Item Measuring point Normal value
DC LINK CE101 voltage
Main control 15V CE154 voltage
Main control 12V CE157 voltage
Main control 5V CE158 voltage
Main control 3.3V CE155 voltage
RJ100F5HXEA MAIN PCB
Item Measuring point
12V CN12
5V CN32 3-4PIN
RJ100F5HXEA INVERTER PCB
Item Measuring point
DC LINK PFCM 33/32
Main control 15V
refer to picture
Main control 12V
refer to picture
Main control 5V
refer to picture
Main control 3.3V refer to picture
4. Checking PFCM
Check Resistance between R and S
RJ040F2HXEA/RJ050F2HXEA
s
R
RJ060F3HXEA/RJ070F4HXEA/RJ080F4HXEA
s
R
RJ100F5HXEA
Samsung Electronics
AC220V -> 305~310Vdc
14.5V - 15.5V
12V - 15V
4.75V - 5.25V
3.0V - 3.6V
Normal value
DC11~13V
DC4.75~5.25V
Normal value
300~320V
DC 14~16V
DC 11~13V
DC 4.75V - 5.25V
DC 3.0V - 3.6V
Measuring point
Resistance R - S
RJ060F3HXEA/RJ070F4HXEA/RJ080F4HXEA
Item Measuring point
DC LINK CE001 voltage
Main control 15V CE110 voltage
Main control 12V CE108 voltage
Main control 5V CE106 voltage
Main control 3.3V CE105 voltage
Normal value
over the hundreds
Normal value
AC220V -> 305~310Vdc
14.5V - 15.5V
12V - 15V
4.75V - 5.25V
3.0V - 3.6V
4-33