Fujitsu Waterstage DHW Series - Details; Operation of the DHW System; Selecting Cooling Mode; Pilot Wire Operation

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Details
If the electrical power supply has been cut o󰀨 while
the heat pump is operating (electrical power failure or
unprogrammed pressing of the on/o󰀨 switch on the
hydraulic unit) the display will show error 370 when
the appliance restarts. Do not be concerned, the
communication between the outdoor and hydraulic unit
will re-establish itself in a few moments.
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Operation of the DHW system*
The key enables you to switch the DHW (domestic hot
water) mode on and o󰀨. The selection is shown by a
bar, which appears under the corresponding symbol.
Manual activation: Hold down the DHW key for 3 seconds
(Switch from "reduced" to "nominal" until the next time
the DHW timer switches over).
To ensure a DHW setting over 45°C, the electrical back-
up heating or the boiler must be left on.
In order to optimise operation of the DHW, it is possible to:
- Program the timer settings (parameters 560 to 576),
- Adjust the comfort temperature set point (parameter 1610),
- Adjust the reduced temperature set point (parameter 1612).
Press the info key to obtain the details on the DHW
(temperature setting operation).
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Selecting cooling mode*
If the installation is tted with the cooling kit.
The key activates and deactivates cooling mode.
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Pilot wire* (if kit regulation
extension AVS 55)
It's possible to order up to 15 electric heaters via output
"pilot wire".
The "pilot wire" handles only the hourly operation
of electric heaters (comfort mode / reduced mode
commutation and Frost protection mode).
The comfort temperature setting should be done
directly on the electric heater(s). The "pilot wire" does
not handle the temperature of the electric heaters.
Refer to the manual supplied with the electric heater(s).
Put the electric heaters on "PROG" mode or "AUTO"
mode for piloting by the regulation board.
The di󰀨erence between the comfort temperature and
the reduced temperature is from 3.5°C.
Frost protection temperature is set directly on the
electric heaters. Refer to the manual supplied with the
electric heater(s).
In the absence of signal, electric heaters operating in
comfort mode.
g. 8 - Select the DHW mode
g. 9 - Information key
Brief
press
Details of any error
Operating values
...
g. 10 - Selecting cooling mode
g. 11 - Selecting the frost protection
* depending on conguration / option
Waterstage / OPERATING INSTRUCTIONS / 2010 - EN