Nirvana External Control Integration Issue

Heater will not start when controlled by pool automation, but starts manually at the heater.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Incorrect wiring to fireman’s switch terminals, Misconfigured automation heater type, Open external safety loop, Low-voltage polarity issues

How to Fix / Troubleshooting

Safety first: Turn off power before working on low-voltage control wiring.

  • Verify wiring: Check the low-voltage terminal strip on the Nirvana heater. Ensure the fireman’s switch or remote enable terminals are wired according to both the Nirvana and automation manuals.
  • Automation settings: In the pool automation controller, confirm that the heater type is set to a compatible Nirvana gas heater profile and that setpoints are above water temperature.
  • Bypass test: Temporarily jumper the remote enable terminals at the heater (if allowed by the manual). If the heater starts, the issue is in the external wiring or automation relay.
  • Polarity and common: Ensure that any 24V control circuits share a common reference as required and that polarity is correct.
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Repair Difficulty

Medium 3/5

Required Part

Nirvana Low-Voltage Control Terminal Block
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