Troubleshooting - Rinnai Continuous Flow Water Heaters Operation Manual

Troubleshooting

With controllers or status monitor
Your Rinnai continuous flow water heater has a self diagnostic capability. If a fault occurs, an
error code will flash on the digital monitor (if you have water controllers) or status monitor
(selected models only). This assists with diagnosing the fault and may enable you to overcome
a problem without a service call. Please quote the code displayed when contacting Rinnai.
Common Fault
Error Codes
- Noticeable reduction of water flow.
03 Power interruption during bath fill, water will
not flow when power is back on.
10 Air intake or flue blocked.
11 No ignition, no gas supply.
12 Flame failure, low gas flow.
14 Over heat thermal fuse.
16 Over temperature warning.
32 Outgoing water temperature sensor faulty.
33 Heat exchanger outlet sensor faulty.
52 Gas modulating valve faulty.
61 Combustion fan failure.
65 Water flow control faulty (does not stop flow
properly).
71 Microprocessor failure.
72 Microprocessor failure.
LC (00) Scale build-up in heat exchanger (when
checking maintenance code history, 00 is
substituted for LC)
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, try pushing the On/Off button Off, then On again. If
the error code remains, contact Rinnai for advice.
Without controllers
Fault
Unit does not start.
Units starts and then shuts down immediately.
Unit starts then water goes cold.
Faults caused by insufficient gas supply, insufficient water supply, gas quality, water quality,
installation errors or operation errors are not covered by the Rinnai warranty.
Rinnai New Zealand
Possible Solution
Inlet water filter needs to be cleaned. Service call.
Turn off all hot water taps and press On/Off twice.
Service call.
Check gas is turned on at water heater and gas meter
or cylinder.
Check gas is turned on at water heater and gas meter
or cylinder. Check there are no obstructions to the flue
outlet.
Service call.
Service call.
Service call.
Service call.
Service call.
Service call.
Service call.
Service call.
Service call.
Service call.
Possible Solution
Check power is on at the unit. Check gas isolation valve
at the unit and gas meter are fully open.
Check power is still on. Check gas isolation valve at the
unit and gas meter are fully open. Open your hot water
tap fully.
Check power is still on. Open your hot water tap fully.
Continuous Flow Water Heater Operation Manual
20
01-09