Code

Fault

Remedy

 

 

 

16

Over Temperature

Check for restrictions in air flow around unit and vent terminal.

 

Warning

Check for low water flow in a circulating system causing short-cycling.

 

 

Check for foreign materials in combustion chamber and/or exhaust piping.

 

 

Check for clogged heat exchanger.

 

 

 

25

Condensate Trap Error

Condensate container is full.

 

 

Check condensate drain for blockage.

 

 

Replace condensate trap.

31

Burner Sensor Error

Measure resistance of sensor.

 

 

Replace sensor.

32

Outgoing Water

Check sensor wiring for damage.

 

Temperature Sensor

Measure resistance of sensor.

 

Fault

Clean sensor of scale build-up.

 

 

Replace sensor.

33

Heat Exchanger

Check sensor wiring for damage.

 

Outgoing Temperature

Measure resistance of sensor.

 

Sensor Fault

Clean sensor of scale build-up.

 

 

Replace sensor.

52

Modulating Solenoid

Check modulating gas solenoid valve wiring harness for loose or damaged terminals.

 

Valve Signal Abnormal

Measure resistance of valve coil.

61

Combustion Fan

Ensure fan will turn freely.

 

Failure

Check wiring harness to motor for damaged and/or loose connections.

 

 

Measure resistance of motor winding.

65

Water Flow Control

The water flow control valve has failed to close during the bath fill function. Immediately turn off

 

Fault

the water and discontinue the bath fill function. Contact a state qualified or licensed contractor to

 

 

service the appliance.

70

Sensor Harness

Check PC board switches (in the bank of 6 switches, #2 should be on for indoor models and off for

 

Connection

outdoor models)

 

 

Check the connection harness at the E connection on the PC board. Outdoor models should have

 

 

2 orange cables at #7 and 8 positions. Indoor models should not have cables at these positions. If

 

 

this is incorrect then replace the sensor harness.

 

 

Replace PC board

71

SV0, SV1, SV2, SV3

Replace PC board.

 

and SV4 Solenoid

 

 

Valve Circuit Fault

 

72

Flame Sensing Device

Ensure flame rod is touching flame when unit fires.

 

Fault

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.

 

 

 

73

Burner Sensor Circuit

Check sensor wiring and PC board for damage.

 

Error

Replace sensor.

 

 

 

LC

Scale Build-up in Heat

Flush heat exchanger. Refer to instructions in manual.

 

Exchanger (when

Replace heat exchanger.

 

checking maintenance

NOTE: The LC code is the only error code that will allow the unit to keep running. The display will

 

code history, “00” is

alternate between the LC code and the temperature setting. The controller will continue to beep.

 

The LC code will reset if power is turned off and then on.

 

substituted for “LC”)

 

 

No

Nothing happens when

Clean inlet water supply filter.

code

water flow is activated.

On new installations ensure hot and cold water lines are not reversed.

 

 

Check for bleed over. Isolate unit from building by turning off cold water line to building. Isolate the

 

 

circulating system if present. Open your pressure relief valve; if water is flowing, 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.

 

 

Check for DC shorts at components.

 

 

 

Manual - Rinnai Condensing Water Heaters

13

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Rinnai RC98E, RC98I, RC80I, RC80E installation manual Over Temperature, Code

RC80E, RC80I, RC98E, RC98I specifications

The Rinnai RC80E, RC98I, RC98E, and RC80I are high-efficiency tankless water heaters that exemplify leading-edge technology and engineering. Designed to meet the demands of modern households, these units provide continuous hot water while offering energy savings and compact sizes.

Starting with the RC80E, this model features a maximum flow rate of 8 gallons per minute, making it suitable for smaller homes or multi-family settings. It incorporates Rinnai's Circ-Logic technology, allowing homeowners to customize their hot water recirculation. This means users can schedule hot water availability, ensuring comfort while minimizing water waste.

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Moreover, these water heaters are designed for longevity, featuring a durable construction that resists corrosion. Rinnai's commitment to quality is evident in their extensive warranty, proving their confidence in the product’s reliability.

In summary, the Rinnai RC80E, RC98I, RC98E, and RC80I units represent a blend of advanced technology, efficiency, and convenience. With significant flow rates, innovative features like Circ-Logic and Wi-Fi compatibility, as well as robust safety measures, they are an excellent choice for any homeowner looking to enhance their hot water experience while promoting energy efficiency.