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TROUBLESHOOTING
The hot water unit has the ability to check its own operation continuously. If a fault occurs,
an Error Code will flash on the Digital Monitor if you have Temperature 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. (Refer to
Warranty page for Warranty Conditions.)
* In all cases, 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. If the Error Code still remains, contact Rinnai or your nearest service
agent for advice.
** Faults caused by insufficient gas/water supply or gas/water quality and installation errors are not covered by the manufacturerÕs warranty.
Troubleshooting Without Controllers
If you have no Temperature Controllers and experience the following symptoms, please carry out
the suggestions below. If the symptom continues, please contact Rinnai for advice.
** Faults caused by insufficient gas/water supply or gas/water quality and installation errors are not covered by the manufacturerÕs warranty.
Code
Displayed
Fault
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 intake or flue blocked
Service Call
11
No ignition / No gas supply
Check gas is turned on at water heater
and gas meter or cylinder. * **
12
Flame Failure / Low gas flow
Check gas is turned on at water
heater and gas meter.
Check that nothing is
obstructing flue outlet.
Turn on gas supply to water heater.*
14
Remaining Flame Safety Device
Service Call
16
Over Temperature Warning
Service Call
32
Outgoing Water Temperature Sensor
Faulty
Service Call
33
Heat Exchanger Outlet Sensor Faulty
Service Call
52
Gas Modulating Valve Faulty
Service Call
61
Combustion Fan Failure
Service Call
65
Water Flow Control Faulty
(does not stop flow properly)
Service Call
71
Micro-processor Failure
Service Call
72
Micro-processor Failure
Service Call
Fault
Remedy
The unit does not
attempt to start at all.
Check the power is on at the unit.
Check the cold water valve at the unit is on.
The unit starts then
shuts down
immediately.
Check the power is still on.
Check the gas valve at the unit and the gas meter is fully open.**
Open your hot water tap fully.
The unit starts then the
water goes cold
Check the power is still on.
Open your hot water tap further or try another tap.
(Your unit has a minimum flow of 3L/min. required to operate the unit.)
