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Troubleshooting without controllers
Fault
Unit doesn't start
Units starts and then immediately
shuts down
Excessive temperature fluctuation
while the water is flowing
Excessive noise or vibration from the
water heater
Faults caused by insufficient gas supply, insufficient water supply, gas quality, water quality,
installation errors or operation errors are not covered by warranty.
Troubleshooting with controllers
Rinnai INFINITY continuous flow water heaters have self-diagnostic capability. If a fault occurs,
an error code will flash in the digital water controllers (or status monitor on selected models). This
assists in diagnosing the fault—please state the code displayed when contacting Rinnai.
In all cases you may be able to clear the error code by turning the hot water tap off, then on again.
If this does not clear the error code, trying pushing the On/Off button Off, then On again. If the error
code remains, contact Rinnai for advice.
Error
Fault
code
Noticeable reduction in water flow
-
Power interruption during bathfill, water
03
will not flow when the power is back on
Bypass flow control failure
05
Air intake or flue blocked
10
No ignition, no gas supply
11
Flame failure, low gas flow
12
Heat exchanger thermistor failure
14
Venturi control failure
15
8 | Rinnai INFINITY operation guide 02-20
Possible solution
Check power is on at the unit. Check the gas isolation
valve at the unit and gas meter are fully open.
Check power is on at the unit. Check the gas isolation
valve at the unit and gas meter are fully open. Open your
hot water tap fully.
Service call
Service call
Possible solution
Inlet water filter needs to be cleaned—service
call.
Turn off all hot water taps and press On/Off
twice.
Service call
Service call
Check gas is turned on at the water and gas
meter, or cylinder.
Check gas is turned on at the water heater
and gas meter, or cylinder. Check there are no
obstructions to the flue outlet.
Service call
Service call
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