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Comm Error 1: Typically occurs after a brownout or power outage and typically can be
cleared by power cycling.
Move breaker (supplying the ProLogic with power) to
the Off position for 2 minutes, then restore power. IF
Comm Error clears, then the problem is solved. IF
Comm Error is still present, go to step 5B.
Power cycle
Step 5A
Step 5B
5. Comm Error 1 OR 2
With power OFF, remove the terminal blocks on the
left side of the PCB (including comm equipment).
Restore power. IF Comm Error clears, the problem
resides in the terminal blocks. IF still present, go to 5C.
Disconnect terminal blocks
NOTE: With ProLogic revision 4.10, a heater terminal block was added (moving the heaters off the
main sensor block which was common in older revisions). Verify all connected heaters are wired to
the correct terminal position, as this can cause display problems and communication errors.
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