Rinnai New Zealand
Demand Duo Lite Operation/Installation: 11451-A
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Customer Information - Servicing
Rinnai has a service and spare parts network with personnel who are fully trained
and equipped to give the best advice on your Rinnai system. If your Demand Duo
Lite needs servicing, please call Rinnai (0800 746 64) from your land line and select
option 1 for a service centre in your area.
For reliable operation Rinnai recommends regular servicing of the Demand Duo system.
Regular servicing is not covered by the Rinnai warranty.
If any electrical component of the system is damaged, it must be replaced by an authorised
person. These components must be a genuine replacement part available from Rinnai.
Do not attempt to carry out any service work other than mentioned in the troubleshooting
section. If you have any other faults or problems, please refer to your installer or call Rinnai.
Customer Information - Troubleshooting
Lack of hot water or no hot water
Is there electricity
to the system?
Check isolating switches and electrical connections to ensure everything
is turned on.
Check the fuse or circuit breakers at the meter box. Repeated failure
of a fuse or tripping of a circuit breaker indicates a fault which must be
investigated by a licensed tradesperson.
Cold Water Relief
Valve discharging
continuously?
It’s normal for the Cold Water Relief Valve to discharge a small quantity
of water through the drain line. If water is discharging continuously
there may be a fault with one of the valves, contact your installer to
discuss.
High electricity/gas bills
If you think your electricity/gas bill is too high, investigate the following:
There may have been a change to your tariffs since your last bill
Cold Water Relief Valve is discharging continuously, refer above
you may be using more hot water than you think
There may be hot water pipe/tap leakages, check with your local plumber
The tank thermostat may not be set to 65 °C
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Is the gas on?
If the gas supply has been interrupted the water heater will display er-
ror code 11 or 1. Turn off the power to the system, wait 10 seconds
before turning on again.