Rinnai REU-KM2035FFUD-E Installation And User Manual page 15

Troubleshooting without controllers
If you have not installed temperature controllers and experience the following
symptoms, please carry out the suggestions below. If symptoms continue, please
contact Rinnai for advice.
Fault
Heater does not attempt
to start at all.
Heater starts then shuts
down immediately.
Heater starts then the
water goes cold.
NOTE: Faults caused by insufficient gas/water supply or gas/water quality and
installation errors are not covered by the manufacturer's warranty.
Installations with circulation pumps
With temperature controller fitted.
If you have an installation using a secondary circulation pump this must be switched off
so that there is no flow through the heater when starting or after a power failure. If the
pump is running the unit will not operate (no display on the controller). Isolate pump
then start heater before restarting pump. This is a safety feature.
The pump should also be fitted with a timer to prevent the consumption of energy while
the building is not used. The timer should bring the system back on at least one hour
before it is to be used.
Without temperature controller fitted.
The heater should automatically reset and provide water at the temperature set by the
internal limit switches.
ERROR MESSAGES
Check the power is on at the heater.
Check the cold water valve supplying the heater is open.
Check the power is on.
Check the gas valve at the heater and at the gas meter is fully open.
Open the hot water tap fully.
Check the power is on.
Open your hot water tap further or try another hot outlet.
Remedy
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