Spi Feedback Error - Samsung AM032MNQDCH/AA Service Manual

4-4-20 SPI Feedback Error

Outdoor unit display
◑(Operation)
Indoor unit display
Criteria • Check if the output of SPI Feedback is 12V.
Cause of problem • SPI defect
1. How to check
Is the SPI connector of an
indoor unit separated from PCB?
Can you measure 12V from
#1, #4 power with SPI connector
Samsung Electronics
◑(Timer)
×(Fan)
Yes
예
being connected?
Yes
Replace Main PCB
◑(Filter)
×(Defrost)
No
Connect the connector to PCB
and reoperate
#1 #4
No
Replace SPI
Troubleshooting
4-63