Hayward ProLogic Troubleshooting Manual page 33

5. Comm Error 1 OR 2
Comm Error 1: Typically occurs after a brownout or power outage and typically can be
cleared by power cycling.
Power cycle Disconnect terminal blocks
Step 5A
Step 5B
Move breaker (supplying the ProLogic with power) to With power OFF, remove the terminal blocks on the
the Off position for 2 minutes, then restore power. IF left side of the PCB (including comm equipment).
Comm Error clears, then the problem is solved. IF Restore power. IF Comm Error clears, the problem
Comm Error is still present, go to step 5B. resides in the terminal blocks. IF still present, go to 5C.
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.
33