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for heat pump units also equipped with electric heaters or
other auxiliary heating elements. This mode avoids operation
of the compressors in extreme outdoor temperature condi-
tions in which these devices are hardly efficient.
The display will show room temperature, the
icon (flashing
if the machine is on, and static and no sides if not), the text
EMERG
HEAT
, room occupation status (Day, Night or Unoccupied),
fan status, day of the week and time.
EMERG
HEAT
AUTO
5
°C
A demand is generated when the room temperature is below
the programmed set point.
Vent only
The ventilation only mode is accessed in the OFF mode by
pressing the
key to select the fan speed. The air con-
ditioning system is now off and only the fan is operative.
The screen displays air conditioning mode OFF, room tem-
perature, fan status, day of the week and time.
OFF
7
°C
The following section details how to define fan speed.
Ventilation
There are two possible configurations: with or without speeds
(defined by pin 6 of the micro-switch. OFF indicates 3 speeds,
ON indicates no speeds; see Configuration of micro-switches).
If there is communication between the thermostat and the
control board, the setting of 1 or 3 speeds is carried out auto-
matically.
Configuration with no speeds allows choosing between:
- ON: Always operative. The fan appears with no wind icon.
- AUTO: Operative as needed, upon demand. The fan appears
with no wind icon, but with AUTO below same.
Configuration with speeds allows choosing between:
- ON: The fan appears and the wind icons indicate the speed.
- AUTO: Operative as needed, upon demand. The fan appears
with AUTO below same, and the wind icons indicate the
speed.
Available speeds are as follows:
- HIGH: Maximum speed. Three wind icons.
- MED.: Medium speed. Two wind icons.
- LOW: Minimum speed. One wind icon.
- AUTO: Automatic. The system selects fan speed automati-
cally with regard to the set point temperature. The AUTO
icon flashes, appearing without wind icons. When the differ-
ence is below 1° C, speed is LOW; when between 1 and
3°C, the speed is MED; and above 3° C, the speed is HIGH.
Fan configuration can be carried out in two different ways:
- By means of the programming menu.
- Pressing the
key.
The programming menu configures the fan for each occupa-
tion status: occupied (comfort or day), stand-by (economy or
night) and unoccupied. This program will be detailed further
below.
Pressing the
key gives access to the Setting mode,
that lasts 5 seconds. Pressing the key once does not change
the present status; this is displayed, with the fan flashing.
Pressing consecutively changes fan operation.
In the AUTO PROG mode, the change over of fan operation
with the
key is temporary. When the set point is
changed, the original programmed value is recovered. Upon
resetting the fan, the remaining air conditioning modes change
their programmed values.
The vent only mode is nothing but the setting of the fan to
OFF mode. Changes made in the OFF mode do not remain
when exiting this mode.
Operating modes
There are three different thermostat operation modes avail-
able: Normal Mode, Set Mode and Program Mode.
Normally, the thermostat will be set to Normal Mode, ex-
ecuting the programmed temperature control algorithm and
time schedule profile (if in the
AUTO
PROG
air conditioning mode).
The keys correspond to the symbols printed on them.
When, in the Normal Mode, the key to change the air condi-
tioning mode, occupation status, set point temperature or fan
operation is pressed, the thermostat will go to Setting Mode,
which it will not exit until five seconds after having pressed
the last setting key. This will validate all changes made in the
setting process. In the setting mode the parameters that are
changed flash: If the mode is changed, it flashes. If set point
or occupation status are changed, the thermostat icon flashes,
since the system set points are being changed. And if fan
operation is changed, it flashes as well.
In Normal Mode, pressing the
PROG
key accesses the Pro-
gramming Mode, where we will se the programming menu
that allows changing the different thermostat parameters. In
this mode, the keys change the functions associated with
their symbols (operational keys: next, back, accept and de-
lete). If no other key is pressed in 30 seconds, the thermostat
goes back to the Normal Mode.