Code

Error	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.
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 damage 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 Servo	If blank screen is present on remote control then the flow control has shorted out.
	Faulty	Unplug flow control. If remote lights up and unit starts operating then replace flow
	(does not stop flow properly)	control assembly.
71	SV0, SV1, SV2, and	Check wiring harness to all solenoids for damage and/or loose connections.
	SV3 Solenoid Valve	Measure resistance of each solenoid valve coil.
	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.
LC	Scale Build-up in Heat	Flush heat exchanger. Refer to instructions in manual.
	Exchanger (when	Replace heat exchanger.
	checking maintenance
	code history “00” is
	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 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.
		Check for DC shorts at components

14	VA Series Indoor LS Manual

REU-VA3237FFU specifications

The Rinnai REU-VA3237FFU is a high-efficiency gas continuous flow water heater designed to provide instant hot water on demand. It is particularly well-suited for households that require a reliable source of hot water while maximizing energy savings. This unit boasts impressive features that set it apart in the market, catering to both residential and commercial applications.

One of the standout characteristics of the REU-VA3237FFU is its energy-efficient design. With an impressive energy factor of 0.89, this model delivers exceptional performance, maximizing energy use and minimizing waste. The continuous flow technology means that there is virtually no wait time for hot water, making it ideal for busy households with multiple points of use.

The REU-VA3237FFU employs advanced temperature control technology. It features an intelligent digital controller that allows users to easily set their desired water temperature. This ensures consistent delivery of hot water at the desired temperature, enhancing comfort while also promoting safety by reducing the risk of scalding. The model also incorporates a safety lock function that can prevent accidental changes to the temperature setting.

In terms of durability and design, the Rinnai REU-VA3237FFU showcases high-quality build materials that contribute to its longevity. The stainless steel heat exchanger is resistant to corrosion, ensuring a long life expectancy and reliable performance over time. Additionally, the compact design makes it easy to install in tight spaces, whether indoors or outdoors, adapting to various installation environments.

Moreover, the Rinnai REU-VA3237FFU features a low NOx emission system, aligning with environmental standards and regulations. This eco-friendly technology makes it an excellent choice for environmentally conscious consumers looking to reduce their carbon footprint while enjoying the benefits of modern hot water systems.

The Rinnai REU-VA3237FFU is also equipped with a self-diagnostic system, which allows for easier maintenance and troubleshooting. This feature increases the unit's reliability by monitoring its performance and alerting users to any potential issues before they develop into significant problems.

In summary, the Rinnai REU-VA3237FFU is a standout continuous flow water heater that combines energy efficiency, durability, and advanced technology. With its smart temperature control, compact design, and environmentally friendly features, it is an outstanding choice for anyone seeking a dependable and efficient hot water solution.

Error

REU-VA3237FFU specifications