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| Rinnai INFINITY operation guide 02-20
Troubleshooting without controllers
Fault
Possible solution
Unit doesn’t start
Check power is on at the unit. Check the gas isolation
valve at the unit and gas meter are fully open.
Units starts and then immediately
shuts down
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.
Excessive temperature fluctuation
while the water is flowing
Service call
Excessive noise or vibration from the
water heater
Service call
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
Error
code
Fault
Possible solution
-
Noticeable reduction in water flow
Inlet water filter needs to be cleaned
—
service
call.
03
Power interruption during bathfill, water
will not flow when the power is back on
Turn off all hot water taps and press On/Off
twice.
05
Bypass flow control failure
Service call
10
Air intake or flue blocked
Service call
11
No ignition, no gas supply
Check gas is turned on at the water and gas
meter, or cylinder.
12
Flame failure, low gas flow
Check gas is turned on at the water heater
and gas meter, or cylinder. Check there are no
obstructions to the flue outlet.
14
Heat exchanger thermistor failure
Service call
15
Venturi control failure
Service call
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.
