Carrier Type A Manuel D'installation page 6

Type A Electronic Control
Control
Fig. 6
Dip
.
Cooling: minimum selectable temperature: 23°C.
Heating:
Closed
Open
Closed
Open Continuous ventilation.
Closed Temperature block disabled.
Open Temperature block enabled.
Closed "Air sampling" disabled.
Open "Air sampling" enabled.
NOTE:
Internal sensor:
This is used in all installations where the control is wall-mounted.
electronic board screenprint.
GB - 4
Remote sensor
This is used on all installations with unitmounted control. It is
screenprint.
X3
Internal sensor
Fig. A
Possible causes:
This happens when:
Fig. 7
Autotest
changeover button pressed and at the same time pressing the
speed selection button three times within 1 second.
Motorized cold-water valve.
Fig. 8
X3
re indicated:
5 seconds.
Fig. B