14
1.4 TROUBLE SHOOTING
Rinnai continuous flow water heaters have a self diagnostic capability. If a fault occurs, an error code will flash on the
digital monitor of your water controllers. This assists with diagnosing the fault, and may enable you to overcome a
problem without a service call. Please quote the code displayed when enquiring about service.
You may be able to clear the error code simply by turning the hot water tap OFF, then ON again. If this does not
clear the error code, try pushing the On/Off button OFF, then ON again, or turning the power for unit OFF, waiting 10
seconds and then ON again.
If the error code still remains, contact Rinnai for advice.
1.4.1 ERROR CODES
Code Description Remedy
-
Noticeable reduction
in water flow.
Inlet water filter needs to be cleaned - Service call.
03
Power interruption
during bath fill (water
will not flow on power
reinstatement)
Turn off all hot water taps. Press On/Off twice.
10
Air Supply or Exhaust
Blockage
Service Call
11
No Ignition
(heater not turning
on)
Check that the gas is turned on at the water heater, gas meter, or
cylinder.
If the system is LPG, make sure that gas is in the tank.
Ensure appliance is properly grounded.
licensed
professional
only
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 and programming parameters 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.
12
No Flame
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 LPG, make sure that gas is in the tank.
licensed
professional
only
Ensure gas line, meter, and/or regulator is sized properly.
Ensure gas type and pressure is correct.
Bleed all air from gas lines.
Ensure condensation collar was installed properly.
Verify dip switches and programming parameters 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.
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