Installer reference guide BRC1E53
39
4P419250-1 – 2015.10
External Input Interlock Function
Window contact logic:
Window contact B1 Key Card contact B2 Time Action
Closed Closed / • The unit is operating normally.
• The unit returns to the previous
state before opening the contact.
Open Closed / The unit is forced off (operation off):
• No delay and reset timer
functionality.
• No setback functionality.
• Not possible to turn the unit ON
with the On/Off button.
Key Card contact logic:
Window contact B1 Key Card contact B2 Time Action
Closed Closed • /
• Delay timer < Time
< Reset timer
• Time > Reset timer
• The unit is operating normally.
• The unit returns to the previous
state before opening the contact
if the reset timer has not expired.
• The unit returns to the "Default
Reset Setting" state (menu
setting) if the reset timer has
expired.
Closed Open Time < Delay timer The unit is operating normally.
Closed Open Time > Delay timer The unit is forced off (operation off):
• Depending on whether the
setback functionality is enabled,
setback will work or not.
• Not possible to turn the unit ON
with the On/Off button.
• The Reset timer starts counting
after the Delay timer has expired.
● The previous state consists of On/Off state, Operation mode, cooling and heating setpoint.
● The fan speed and the setback cooling and heating setpoint can be changed at any time
without losing the changes when using the contacts.
● The fan speed is stored for the two main operation modes independantly. Heating only has its
own saved fan speed and Cooling only, Dry and Fan only have their own fan speed.
● Changes made while the Key Card contact is open and the delay timer has not expired
(normal operation) are not saved when closing the contact again.
NOTE
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