Heater displays E29 and will not respond to commands from automation.

Safety: Turn off power to heater and automation before changing wiring or DIP switch settings.

• Check device addressing: On the heater control board, verify any address or DIP switch settings match the automation system’s configuration.
• Review automation setup: In the Pentair automation menu, confirm the heater type, address, and communication settings are correct.
• Update firmware: If available, update automation firmware to the latest version to ensure compatibility with the heater model.
• Test with direct control: Temporarily operate the heater in local mode to confirm it functions independently, then re-enable automation control.