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Rinnai · Combi boiler

ECL Reset complete (gas solenoid circuit)

Normal status I-Series Plus 150K and smallerI-Series Plus 175K and higher

What the display is showing

ECL shows on the display after SW1 and SW2 on the PC board are pressed together at the end of the code 520 procedure. The gas valve solenoid code is cleared and the boiler goes back to normal operation. If code 520 returns, the gas valve and venturi assembly must be replaced.

Applies to: Rinnai I-Series Plus boilers and combis (150K and smaller, 175K and higher)

What to do

  1. Press SW1 and SW2 together until ECL is shown.

Models that show this code

8 models in I-Series Plus 150K and smaller, I-Series Plus 175K and higher

IP060160CIP090099CIP090160CIP090199CIP120199CIP150199CIP175199CIP199199C

Other codes on the same units

  • 763 0-10V external control input over-voltage
  • 890 Freeze condition detected
  • 999 PC Board / software mismatch
  • SW1-SW3 PC board buttons (SW1, SW2, SW3)
  • FFF Maintenance performed marker
  • LC Lime condition – flush plate heat exchanger
  • P Venturi reset: first screen
  • PCL Venturi reset accepted

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Source: Rinnai Troubleshooting I-Series Plus Diagnostic Codes (800000375), Code 520 step 4 p.30. Summarized in our own words; check the original manual for your model.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.