aqua rite pro communication error?

did 5a and 5b I dont have all the sensors of 5c so skipped that one wiring harness showed continuity. Sometimes I have to hold the display down for the display to show up and say communication error.

3 years old.

Replaced by leslie pool supply in july 2021

Called leslie on advice of hayward and they diagnosed it as a faulty board guy installed it worked great now having same issues.
 
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