Fault Condition: No burner operation during freeze protection mode
Item to check : Service Call
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: Power interruption during Bath fill (Water will not flow when power returns)
Item to check : Turn off all hot water taps. Press ON/OFF twice.
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: Air Supply or Exhaust Blockage
• Ensure Rinnai approved venting materials are being used.
• 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.
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: 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.
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: 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 re-connect all wiring harnesses on unit and PC board. • Check all components for electrical short.
• 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.
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: Thermal Fuse
• Check gas type of unit and ensure it matches gas type being used.
• Check for restrictions in air flow around unit and vent terminal.
• Check for low water flow in a circulating system causing shortcycling.
• Ensure dip switches are set to the proper position.
• Check for foreign materials in combustion chamber and/or exhaust piping. • Check heat exchanger for cracks and/or separations.
• Check heat exchanger surface for hot spots which indicate blockage due to scale build up. Refer to instructions in manual for flushing heat exchanger. • Measure resistance of safety circuit.
• Ensure high fire and low fire manifold pressure is correct.
• Check for improper conversion of product
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: Over Temperature Warning
• Check for restrictions in air flow around unit and vent terminal.
• Check for low water flow in a circulating system causing shortcycling.
• Check for foreign materials in combustion chamber and/or exhaust piping. • Check for clogged heat exchanger.
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: OBurner Sensor Error
• Measure resistance of sensor.
• Replace sensor
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: Outgoing Water Temperature Sensor Fault
• Check sensor wiring for damage.
• Measure resistance of sensor.
• Clean sensor of scale build up.
• Replace sensor.
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: (Nothing happens when water flow is activated.)
• Clean inlet water supply filter.
• On new installations ensure hot and cold water lines are not reversed.
• Check for bleed over. Isolate unit from building by turning off hot water line to building. Isolate the circulating system if present. Open your pressure relief valve; if unit fires, there is bleed over in your plumbing.
• Ensure you have at least the minimum flow rate required to fire unit.
• Ensure turbine spins freely.
• Measure the resistance of the water flow control sensor.
• Remote control does not light up but you have 12 VDC at the terminals for controls.
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: Heat Exchanger Outgoing Temperature Sensor Fault
• Check sensor wiring for damage.
• Measure resistance of sensor.
• Clean sensor of scale build up.
• Replace sensor.
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: Combustion Air Temperature Sensor Fault
• Check for restrictions in air flow around unit and vent terminal.
• Check sensor wiring for damage.
• Measure resistance of sensor.
• Clean sensor of scale build up.
• Ensure fan blade is tight on motor shaft and is in good condition.
• Replace sensor.
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: Modulating Solenoid Valve Signal Abnormal
• Check modulating gas solenoid valve wiring harness for loose or damage terminals. • Measure resistance of valve coil.
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: Combustion Fan Failure
• Ensure fan will turn freely.
• Check wiring harness to motor for damaged and/or loose connections.
• Measure resistance of motor winding.
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: Water Flow Servo Faulty (does not stop flow properly)
Item to check : If blank screen is present on remote control then the flow control has shorted out. Unplug flow control. If remote lights up and unit starts operating then replace flow control assembly.
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: SV0, SV1, SV2, and SV3 Solenoid Valve Circuit Fault
Item to check : Replace the PC Board.
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: Flame Sensing Device Fault
• Ensure flame rod is touching flame when unit fires.
• Check all wiring to flame rod for damage.
• Remove flame rod and check for carbon build-up; clean with sand paper. • Check inside burner chamber for any foreign material blocking flame at flame rod. • Measure micro amp output of sensor circuit with flame present.
• Replace flame rod.
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: Burner Sensor Circuit Error
• Check sensor wiring and PCB for damage.
• Replace sensor
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
Fault Condition: Scale Build-up in Heat Exchanger (when checking maintenance code history “00” is substituted for “LC”)
• Flush heat exchanger. Refer to instructions in manual.
• Replace heat exchanger.
Call or Contact Us Now! for further troubleshooting.
Book Service, Call 1800 633 920
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