@ilios12 this error is a communication error "1-1) If there is no answer for 10 seconds after the panel micom received the requirement of communication,
“Pc – Er” display on the panel PCB will be ON/OFF alternately until the communication error is canceled.
(0.5 sec ALL ON, 0.5 sec ALL OFF alternately)
1-2) “Pc – Er” display on the Pantry Room Display will be ON/OFF alternately until the communication error is canceled. (0.5 sec ALL ON, 1.5 sec ALL OFF alternately)
now you told us that Samsung send you to a picture to "pull a wire" see if this one is like yours
[image|1149891]
to place your refrigerator into a test mode check [https://www.appliancevideo.com/repair-help/question/i-need-error-codes-on-this-samsung-refrigerator-model-troubleshooting-guides|this link]