Diagnostic Codes And Remedies - Rinnai RL75i Installation And Operation Manual

Diagnostic Codes and Remedies

WARNING
Code Definition
03 Power interruption during Bath
Fill (Water will not flow when
power returns).
10 Air Supply or Exhaust Blockage
11 No Ignition
(heater not turning on)
12 No Flame
14 Thermal Fuse has activated
16 Over Temperature Warning
(safety shutdown because unit is
too hot)
Some of the checks below should be done by a licensed professional. Consumers
should never attempt any action that they are not qualified to perform.
licensed
professional
only
licensed
professional
only
licensed
professional
only
licensed
professional
only
licensed
professional
only
Remedy
Turn off all hot water taps. Press ON/OFF twice.
Check that nothing is blocking the flue inlet or exhaust.
Check all vent components for proper connections.
Ensure approved venting materials are being used.
Ensure vent length is within limits.
Verify dip switches are set properly.
Check fan for blockage.
Check that the gas is turned on at the water heater, gas meter, or cylinder.
If the system is propane, make sure that gas is in the tank.
Ensure appliance is properly grounded.
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 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.
Check the ground wire for the PC board.
Check that the gas is turned on at the water heater, gas meter, or cylinder.
Check for obstructions in the flue outlet.
If the system is propane, make sure that gas is in the tank.
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 venting material was installed.
Ensure condensation collar was installed properly.
Ensure vent length is within limits.
Verify dip switches are set properly.
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 reconnect all wiring harnesses on unit and PC board.
Check for DC shorts at components.
Check gas solenoid valves for open or short circuits.
Remove burner plate and inspect burner surface for condensation or debris.
Check for restrictions in air flow around unit and vent terminal.
Check gas type of unit and ensure it matches gas type being used.
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. Hard water
must be treated to prevent scale build up or damage to the heat exchanger.
Measure resistance of safety circuit.
Ensure high fire and low fire manifold pressure is correct.
Check for improper conversion of product.
Check for restrictions in air flow around unit and vent terminal.
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 blockage in the heat exchanger.
VC Series Manual 37