Rinnai FUA-E, Service Manual

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Remote temperature controllers are a feature that provides control over the water
temperature. The Rinnai Infinity 16i water heater can be operated with 1, 2, or 3
temperature controllers. The controller MC-45-SR-EU comes as standard with this
water heater installed into the front panel.
Along with temperature control the controllers are useful for servicing and fault finding as
they will show an error code if there is a problem. This will be a flashing number on the
display.
Further to this the flow rate through the unit can be displayed by holding down the Temp
UP Arrow Button and pressing the Power Button. The flow will be displayed in L/min.
Therefore 4 = 4 L/min and 12 = 12 L/min.
The Remote will also display the outgoing hot water thermistor read temperature by
holding down the Temp Down Arrow Button and pressing the Power Button. The
temperature is shown in degrees Centigrade.
Remotes
Digital Monitor
Indicates the tem-
perature selected.
Error message
flashes in the event
of a fault.
Priority Button
Used to transfer con-
trol between tem-
perature controllers.
The controller with
priority has command
of the hot water de-
livery temperature.
Priority Indicator
Indicates that the
controller has com-
mand of the system
(glowing,) or that the
system is free to take
command of (off.)
ON / OFF Button
Used to switch hot
water system on
and off.
Temperature
Buttons
Used to select hot
water delivery
temperature.