Samsung AC071JN4CEH Service Manual page 70

Troubleshooting
1. Test Item
1) Is the power of the outdoor unit inverter PBA on?
2) Check the power connection and fuse.
3) Is there a problem in the communication connections between the outdoor unit inverter (CN31) and main PBA (CN39)?
(RC072DHXB excluded)
4) Check the communication connections.
2. Check procedure
30 seconds after power off, power on.
Does the communication error occur??
Is the power of the inverter PBA on?
Is there a problem
in the connections of communications
between the outdoor unit inverter (CN31)
and main PBA (CN39)?
Replace the outdoor unit inverter or main PBA.
1. If E203 Error to 7-segment of the main PBA of the outdoor unit is displayed, replace
the inverter PBA and then the main PBA of the outdoor unit is normal.
2. If Red – ON, Green – OFF, and YELLOW – Blink are displayed in the LED display of the
outdoor unit inverter, and there is no indication in 7-segment of the main PBA of the
outdoor unit, replace the main PBA
[Main PBA 7-segment
confirming part (Common)]
4-30
Yes (In case of RC072DHXB excluded, replace the PBA, After
resetting the power, reconfirm and then close.)
Add next to Yes
[Check of LED of Inverter PBA]
Yes
Yes
The outdoor unit inverter PBA is normal.
[RC HXG , RC145DHXH , [RC
AC100FCA GH Inverter PBA LED AC
confirming part ]
No
No
[RC
1
[RC
No
[RC
[RC
Inverter PBA connecting part
HX , RC100DHXB ,
FCA EH Inverter PBA LED
confirming part]
End the service.
Check the power connection and fuse.
1. Is there a problem in the power connection between
main PBA and the EMI PBA of the outdoor unit?
2. Is there a problem in power connection between the
inverter and the EMI PBA of the outdoor unit?
3. Is the fuse (FUSE100) of the inverter PBA of the outdoor
unit normal? (Short-Normal, Open-Fault, limited to
RC HXG , RC145DHXH , AC100FCA GH)
HXG , RC145DHXH , AC100FCA GH Confirmation Matters]
2 2
HXE , RC100DHXB , AC
Check the communication connections.
HXG , RC145DHXH , AC100FCA GH Confirmation Matters]
1 2
Inverter PBA connecting part Main PBA connecting part
(CN31) (CN39)
HXE , RC100DHXB , AC
(CN31)
Main PBA connecting part
(CN39)
Samsung Electronics
3
FCA EH Confirmation Matters]
FCA EH Confirmation Matters]