Rinnai Comprehensive Guide to Error Codes and Troubleshooting Techniques

Error Codes

The Rinnai water heater has the ability to check its own operation continuously. If a fault occurs, an error code will flash on the display of the temperature controller. This assists with diagnosing the fault and may enable you to overcome a problem without a service call. Please identify the code displayed when inquiring about service.

Code	Fault	Remedy
02	No burner operation during	Service Call
	freeze protection mode
03	Power interruption during	Turn off all hot water taps. Press ON/OFF twice.
	Bath Fill (Water will not flow
	when power returns).
10	Air Supply or Exhaust	Ensure Rinnai approved venting materials are being used.
	Blockage	Check that nothing is blocking the flue inlet or exhaust.
		Check all vent components for proper connections.
		Ensure vent length is within limits.
		Ensure condensation collar was installed correctly.
		Verify dip switches are set properly.
		Check fan for blockage.
11	No Ignition	Check that the gas is turned on at the water heater, gas meter, or cylinder.
		Ensure gas type and pressure is correct.
		Ensure gas line, meter, and/or regulator is sized properly.
		Bleed all air from gas lines.
		Verify dip switches are set properly.
		Ensure appliance is properly grounded.
		Disconnect EZConnect™ or MSA controls to isolate the problem.
		Ensure igniter is operational.
		Check igniter wiring harness for damage.
		Check gas solenoid valves for open or short circuits.
		Remove burner cover and ensure all burners are properly seated.
		Remove burner plate and inspect burner surface for condensation or debris.
12	Flame Failure	Check that the gas is turned on at the water heater and gas meter. Check for
		obstructions in the flue outlet.
		Ensure gas line, meter, and/or regulator is sized properly.
		Ensure gas type and pressure is correct.
		Bleed all air from gas lines.
		Ensure proper Rinnai venting material was installed.
		Ensure condensation collar was installed properly.
		Ensure vent length is within limits.
		Verify dip switches are set properly.
		Ensure appliance is properly grounded.
		Disconnect keypad.
		Disconnect EZConnect™ or MSA controls to isolate the problem.
		Check power supply for loose connections.
		Check power supply for proper voltage and voltage drops.
		Ensure flame rod wire is connected.
		Check flame rod for carbon build-up.
		Disconnect and reconnect all wiring harnesses on unit and PC board.
		Check for DC shorts at components.
		Check gas solenoid valves for open or short circuits.
		Remove burner plate and inspect burner surface for condensation or debris.
		Check the ground wire for the PC board.

12 VB Series Indoor LS Manual