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

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