Rinnai RV53I, RV53E installation manual Error Code Table, Fault, Remedy, code

Error Code Table

Code	Fault		Remedy
14	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 short-cycling.
			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.
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.
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.
34	Combustion Air		Check for restrictions in air flow around unit and vent terminal.
	Temperature Sensor		Check sensor wiring for damage.
	Fault		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.
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 Failure		Ensure fan will turn freely.
			Check wiring harness to motor for damaged and/or loose connections.
			Measure resistance of motor winding.
65	Water Flow Control Fault		The water flow control valve has failed to close during the bath fill function. Immediately turn
			off the water and discontinue the bath fill function. Contact a state qualified or licensed
			contractor to service the appliance.
71	Solenoid Valve Circuit		Replace the PC Board.
	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
	code history, “00” is		display will alternate between the LC code and the temperature setting. The controller will
	substituted for “LC”)		continue to beep. The LC code will reset if power is turned off and then on.
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.
		RV53i & RV53e Operation and Installation Manual		11