Front Panel Display And Error Codes; Front Panel Display Indications; Error Code Table - Rinnai REU-VAM1620W Operation And Installation Manual

Front Panel Display and Error Codes

The Rinnai water heater has the ability to check its own operation continuously. If a fault occurs, an error code
will flash on the display in the front panel and on the remote controller if installed. This assists with diagnosing the
fault and may enable you to overcome a problem without a service call. Please identify the code displayed when
inquiring about service.

Front Panel Display Indications

- - Standby (power is supplied but there is no demand for hot water).
On Hot water is being supplied.
FL or FH Stands for Forced Low and Forced High combustion. Only seen during the gas pressure
setting procedure which is done when certain components are replaced.
Error code flashing The error code will stop flashing after the problem is corrected and the water heater
supplies hot water.

Error Code Table

WARNING
Code Fault
02 No burner operation during
freeze protection mode
03 Power interruption during
Bath Fill (Water will not flow
when power returns).
10 Air Supply or Exhaust
Blockage
11 No Ignition
12 Flame Failure
Some of the checks below may need to be done by a qualified service technician. Call a
service technician for any remedy that involves gas or electricity. Call a service
technician if you have any doubt or reservation about performing the remedy yourself.
Remedy
Service Call
Turn off all hot water taps. Press ON/OFF twice.
Check that nothing is blocking the inlet or exhaust.
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.
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 appliance is properly grounded.
Disconnect MSA controls to isolate the problem.
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 that the gas is turned on at the water heater and gas meter. Check for
obstructions in the flue outlet.
Ensure gas line, meter, and/or regulator is sized properly.
Ensure gas type and pressure is correct.
Bleed all air from gas lines.
Verify dip switches are set properly.
Ensure appliance is properly grounded.
Disconnect keypad.
Disconnect MSA controls to isolate the problem.
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 re-connect all wiring harnesses on unit and PC board.
Check all components for electrical short.
Check gas solenoid valves for open or short circuits.
Remove burner plate and inspect burner surface for condensation or debris.
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