Continuous Flow Water Heater Operation Guide 04-12
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15
Troubleshooting with controllers
Common
error codes
Fault
Possible solution
-
Noticeable reduction in water flow
Inlet water filter needs to be cleaned—service
call.
03
Power interruption during bath fill, water
will not flow when power is back on
Turn off all hot water taps and 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 the water heater
and gas meter or cylinder. Check there are no
obstructions to the flue outlet.
14
Overheat thermal fuse
Service call.
16
Over temperature warning
Service call.
25
Condensate trap error
Check condensate drain for blockage.
32
Outgoing water temperature sensor faulty
Service call.
33
Heat exchanger outlet sensor faulty
Service call.
34
Air temperature sensor faulty (internal
models only)
Service call. Will require; checking sensor wiring
for damage, measuring resistance of sensor,
checking combustion fan, checking internal
flue leakage, checking flue system integrity, and
possibly replacing sensor.
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
Microprocessor failure
Service call.
72
Microprocessor failure
Service call.
LC
Scale build-up in heat exchanger—when
checking maintenance code history, 00 is
substituted for LC
Service call.
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.
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.
