Code 11 Troubleshooting Procedure; No Ignition - Rinnai ByPass Servo Troubleshooting Manual

Code 11 Troubleshooting Procedure

No Ignition

WARNING: You must be qualified to service gas systems before proceeding.
1. Verify all gas valves on gas system are open feeding the proper gas pressure to said appliance.
2. Verify all air was purged from gas lines after installation.
3. Verify proper inlet gas pressures are being fed to appliance. Check appliances rating plate for proper
pressures. This plate or label is located on the side of each unit. The minimum listed inlet pressure MUST
be maintained with all gas appliances at the location firing on high fire. If the product is a condensing
unit the front panel must be installed before testing inlet pressures.
4. Verify proper gas type; ensure the gas supply at this location matches that listed on said appliance.
5. Verify gas type dip switch on PC board is switch to proper gas type position.
6. Verify igniter is working. WARNING: Turn off gas valve feeding the appliance before preforming this
test. Unplug igniter wire; hold the igniter wire with an insulated pair of pliers about a 1/4" from a piece
of metal. Cycle the unit to ensure you see a spark when unit is cycling. If not, check ignition system for
loose connections, damaged components or disconnected plugs back to PC board. . If no spark is noted
check the ignition board to verify it is getting the proper voltage from the PC board. See troubleshooting
document under the unit's front cover for proper voltage and connector numbers. Note; there will be no
voltage present unless the unit is going through the ignition cycle.
7. Make sure the ceramic sparker electrode is tight in its mounting bracket. You should not be able to
move it with your finger if gasket is intact. If loose remove it and clean with dollar bill. Reinstall using
new gasket and ensure it is tight when the installation is finished. If the electrode is loose the tip can
drop down and touch the burners creating a short or no spark. A loose flame rod is called a floating
flame rod and will result in code 11's or 12's.
8. Verify the proper flame rod wire is plugged into the proper flame rod. Some units have multiple flame
rods. A quick check to verify correct wiring is to look at the stamped letter on the bracket at flame rod,
sample a Y indicates yellow, R = red and B = blue
9. Verify the flame rod is tight in its mounting bracket. You should not be able to move it with your
finger if gasket is intact. If loose remove it and clean flame rod and igniter. Inspect flame rod for cracks
before re-installing it. Re-install using new gasket and ensure it is tight when installation is finished. A
loose flame rod is called a floating flame rod and will result in code 11's.
10. Look into view window on appliance to see if you ever see a flame in the burner box while the unit is
going through the ignition cycle. If you do that indicates an issue in the flame rectification circuit. This
could be a buildup of carbon or a white substance on flame rod, bad connection at flame rod, loose or
damaged flame rod, bad PC board, gas valve or low inlet gas pressures. Before replacing the PC board or
gas valve continue troubleshooting the steps below.
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