Rinnai HE Series How To Use Manual page 188

1. Clean water inlet filter to water heater.
2. On new installations ensure the hot/cold water lines are not reversed.
3. Ensure you have the minimum flow rate required to fire the unit.
4. Ensure water flow control turbine spins freely.
5. Measure the resistance of the water flow control sensor, see technical data sheet behind front
cover of unit for proper readings.
6. Check for bleed overs, isolate unit from building by turning off hot water line to building. Next
isolate the circulation system if present. Open your pressure relief valve; if water is flowing,
there is a bleed over in your plumbing system.
No Code Troubleshooting Procedure
Nothing happens when water flow is activated
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