
Troubleshooting
4-46
Samsung Electronics
4-4-20 SPI Feedback Error
Indoor unit display
◑
(Operation)
◑
(Timer) ×(Fan)
◑
(Filter) ×(Defrost)
t
SPI defect
Criteria
Cause of problem
t
Check if the output of SPI Feedback is 12V
Outdoor unit display
1. How to check
예
Is the SPI connector of an
indoor unit separated from PCB?
Connect the connector to PCB
and reoperate
Yes
No
Replace Main PCB
Can you measure 12V from
#1, #4 power with SPI connector
being connected?
Replace SPI
No
Yes
#1
#4