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3.21 OUTDOOR UNIT TESTMODE FUNCTION
When test mode is used (see outdoor unit instruction booklet), the
indoor unit must be set in a mode other than "Stand-by".
The alarm E183 is triggered during the test, meaning "Test mode"
in progress.
3.22 OUTDOOR UNIT PUMP DOWN
FUNCTION
If the pump down function is used (see outdoor unit instruction
booklet) the indoor unit must be set in "Stand-by".
The function can only be activated if the appliance is not under
alarm.
3.23 PUFFER IN PREHEATING FUNCTION
In the presence of an inertial storage tank heated by other sources
of heat, following a central heating demand, it is possible to pre-
vent the generators from being activated by using hot water com-
ing from the puffer
The function is activated by setting one of the relays of the relay
board at 4. (see P03, P04,P05).
The puffer function requires the puffer probe.
See the instruction sheet of the relay board for details and exam-
ples
3.24 NIGHT MODE FUNCTION
This function can be activated by setting the internal clock of the
appliance (parameters U 21 and U 22).
Activating the function allows you to reduce the compressor fre-
quency during the outdoor unit operation in the time slot set in
the U 12 and U 13 parameters.
Make sure the additional power sources needed to meet potential
requirements that may present themselves during active opera-
tion are available (e.g. additional resistances).
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3.25 SYSTEM SETPOINT CORRECTION
FUNCTION
In the presence of hydraulic disconnections on the system which
separate the appliance from the low temperature zone (zone 2), a
function can be activated which allows to meet the demands, by
correcting the appliance's setpoint.
The corrections can be made either in heating or cooling mode
only.
They are activated by setting the parameters P 23 or P 24 at a value
> 0°C.
Following a demand, the correction begins after a time equal to P
21 and continues by 1°C every P 22 minutes.
3.26 HEATING / COOLING SELECTOR
FUNCTION
The type of demand, central heating or cooling, can be selected
from the external selector S 44 (see Connections diagram Fig. 8).
To use this command, the function in question must be enabled by
means of the parameter A 39=ON.
To make the demand, select the type: central heating = closed con-
tact, and cooling = open contact, and close the contact of zone 1
room thermostat.
The remote devices cannot be used when the function is enabled,
except for the room thermostat of zone 1; even the demands of
other zones, 2 or 3, are disabled automatically.
3.27 DHW RECIRCULATION FUNCTION
It is possible to manage DHW recirculation by activating the cir-
culator based on a set schedule (see parameters U 32 and U 33).
The function is activated by selecting the relative function in pa-
rameters P 03, P 04 and P 05.
If U 32=U 33, the function is active all day.
For correct operation of recirculation it is necessary to install the
relay board (optional kit).
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