Troubleshooting
Samsung Electronics 4-55
4-4-20 SPI Feedback Error
Indoor unit display
◑
(Operation)
◑
(Timer)
×
(Fan)
◑
(Filter)
×
(Defrost)
• SPI defect
Criteria
Cause of problem
• 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
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