Hayward ProLogic Troubleshooting Manual page 22

2. Blank Display/No LEDs
If the local display shows a blank display or no lights are illuminated an abrupt power
outage may have been the cause, in this case, resetting the unit may correct this
problem.
Verify display connections Disconnect terminal blocks
Step 2A
Step 2B
Turn off power at the main breaker and remove the With power OFF, remove the terminal blocks on the
display wiring harness. Inspect for damage and reseat. left side of the PCB (including comm equipment).
IF damaged, contact technical support for a Restore power. IF display appears, problem resides in
replacement cable (908.355.7995). IF okay, go to 2B. the terminal blocks. IF display is still OFF, go to 2C.
NOTE: If the blank display or No LEDs symptom is being caused by the comm equipment or in the
terminal blocks. Isolate the problem by plugging in one piece of equipment at a time, until the
problem reappears.
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