49
INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
“Stand-by” Mode
Press button (1) repeatedly until the symbol appears. e sys-
tem remains o from this moment, though the antifreeze, pump
anti-block and 3-way function and signalling of any anomalies
are guaranteed.
In these conditions the system must still
be considered powered.
OFF mode
By holding the button (1) down for 8 seconds, the display switch-
es-o and the indoor unit is o completely. In this mode, the safety
functions are not guaranteed and the remote devices are discon-
nected.
In these conditions the indoor unit is
considered still live even if there are no
functions active.
“Au to ma t ic ve nt ” mo d e
Every time the indoor unit is electrically powered, the system au-
tomatic vent function is activated (lasting 8 minutes). is func-
tion is displayed via a countdown signalled by the indicator (14).
During this period the DHW and CH functions are not active.
e “Automatic vent” function can be annulled by pressing the
“Reset” button (3).
Display operation
e display lights up while the control panel is being used; aer a
set inactivity period, the brightness drops until only the active
symbols are displayed. e lighting mode can be varied via pa-
rameter t8 in the P.C.B. programming menu.
System operating with outdoor unit disabled
You can disable the outdoor unit through a prearranged connec-
tion.
Disabling occurs when contact "S41" closes (Fig. 10).
is status is signalled by the ashing of the symbol “Outdoor unit
operation in progress” (8) and the ashing of the anomaly code
“194”.
In this condition the requests are
s a t i s e d by t h e h e at g e ne r a to r.
Solar function
is function is automatically activated if the “Solar ignition de-
lay” parameter is more than 0 seconds.
During a withdrawal, if the outlet water is hot enough or if there is
“Solar ignition delay” time, the system does not switch on, the
D.H.W. withdrawal symbol appears on the display along with
the ashing solar function symbol .
Summer Mode and Solar function active
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When the water supplied by the solar system is at a temperature
lower than what is set, or if the “Solar ignition delay” time has
elapsed, the system switches on to bring the DHW to the set tem-
p e r a t u r e . A t t h i s p o i n t , t h e s o l a r f u n c t i o n s y m b o l w i l l g o o .
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