VTR 100B LITE Installation and Service manual v2

Operation
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8.4 Cool recovery
If the outdoor air is warmer than the extract air and the supply air is above the setpoint, cool recovery occurs. This con-
dition blocks the heat regulation process.
8.5 Service menu overview
Enter the service menu by selecting the service symbol in the display.
Menu Level 1 Menu Level 2 Menu Level 3 Explanation
Service
Password
Password
Password XXXX
Locked YES/NO
Enter the service level by typing
1111. Use the SELECTION knob
for each digit and confirm with
the ENTER button after each set
digit. NO will unlock the system
and allow parameter changes.
Service
Change Password
Change password
Actual XXXX
New XXXX
Confirm XXXX
Set new password if necessary.
In case the new password would
be forgotten or misplaced, it’s
still possible to enter the service
level by writing 8642. This
overrides the earlier set
password.
Service
Filter period
Filter period
Time to replace:
12month
Reset NO/YES
Shows selected time interval
between filter change.
Set Reset of the filter period to
YES after completed filter
change.
Set time between filter changes.
Service
Time/Date
Time/Date YY/MM/DD
Date: 12/09/12
Time: 10:00
Weekday: Sat
Shows current set date and time.
Set Correct date and time.
Service
Summer/Winter
Summer/Winter
Auto time change?
YES/NO
Use this dialog frame to
configure automatic
summertime/wintertime
change-over. Time will
automatically change between
summertime and wintertime
according to European standard,
based on Greenwich time zone.
Default value YES.
Set YES or NO
Service
Ext/Force Run
Ext/Force Run
Remaining time 5
Minutes: 0
Airflow: Nominal
Use this dialogue frame to
program extended time you
want the unit to work under
operation conditions other than
determined by the week
schedule.
Shows remaining time of
extended/forced running.
Shows set time for extended/
forced running.
Shows Set airflow.
Set the time that the unit is to
run in extended/forced mode.
Value range: 0–240 minutes.
Set the airflow for this mode.
Choose between Low, Nom or
High.
Default value: Nom.
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