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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.
NOTE: Faults caused by insufficient gas/water supply or gas/water quality and installation errors are
not covered by the manufacturer‟s warranty.
Fault
Heater does not attempt
to start at all.
Heater starts then shuts
down immediately.
Heater starts then water
goes cold.
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.
RESTARTING THE RINNAI WATER HEATER
Standard system.
Single or multiple water heaters without remote controllers.
The heaters will automatically reset without any user involvement.
Single or multiple water heaters with remote controllers.
The heaters will be required to be switched on using the ON/OFF button on a remote controller.
Ensure that all taps/water outlets are closed and no water is flowing through heaters.
Hot water system incorporating secondary recirculation pump.
Single or multiple water heaters without remote controllers.
The heater(s) will automatically reset without any user involvement.
Single or multiple water heater(s) with remote controller(s).
To reset the heaters follow the steps.
1. Turn off all hot water taps.
2. Turn off supply to secondary circulating pump or alternatively, isolate pump flow.
3. Turn on heater at remote control.
4. Select required temperature.
5. Switch on supply to secondary circulating pump or open valve on pump flow.
The heater will now be ready to supply water at the set temperature.
If following the above procedure does not reset the heater switch it on and off at its main supply, and
then go through these steps again. If heater is still not working call your local service agent or Rinnai for
assistance.
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. Open the hot water tap fully.
Check the gas valve at the heater and at the gas meter is fully open.
Check the power is on. Open your hot water tap further or try another hot outlet.
Remedy
15
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