VTR 100B LITE User manualv01

Maintenance
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When it’s time to change the filters an alarm is shown on
the control panel display. When this occurs do the
following:
1. Stop the unit by disconnecting the mains.
2. Open the front hatch. See chapter 3.2.
3. Remove old filters and insert new ones. Make sure fil-
ters are not mixed up during the replacement process.
Supply and extract air filters may be different.
4. Close and lock the front hatch and connect the unit to
mains.
5. Reset the filter time as described below (chapter
3.3.1). Depending on the condition of the filter, you
might need to change the operation time for the filter.
3.3.1 Resetting the filter time
1. Go to the service menu by using the selection knob.
Service
2. Enter the service level by typing the password.
Use the SELECTION knob for each digit and confirm with
the ENTER button after each set digit and choose "NO"
for the system not be locked.
Service
—>Password
Locked YES/NO
3. Go to: Filter period, press ENTER.
Choose: Reset: YES with the SELECTION knob and then
ENTER.
Change, if necessary, Time to replace X month, to
the time of your choice with the SELECTION knob and
then press ENTER.
Press the RETURN button until you reach the main menu.
Filter period
Time to replace: 6/9/12/15 month
Reset NO/YES
3.4 Check and Clean a Heat Exchanger
Danger
• Make sure that the Mains supply to the unit is disconnected before performing any maintenance or
electrical work!
Warning
• Beware of sharp edges during mounting and maintenance. Use protective gloves.
Even if the required maintenance is carried out, dust will build up in the exchanger block. It is therefore of vital impor-
tance for the upkeep of a high efficiency that the exchanger block is removed from the unit and cleaned periodically as
illustrated below. Clean the heat exchanger at least every 3 years or when required.
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