VTR 100B LITE User manualv01

Trouble shooting |
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3.6.4 Checking and cleaning the duct system
Dust and grease deposits may build up in the duct system, even if required maintenance such as changing of filters is
being carried out. This will reduce the efficiency of the installation.
The duct runs should therefore be cleaned/changed when necessary. Steel ducts can be cleaned by pulling a brush
soaked in hot soapy water through the duct via diffuser/louvre openings or special inspection hatches in the duct sys-
tem (if fitted).
It is recommended to do this every 5 years and is normally carried out by authorized companies specialized in this area.
4 Trouble shooting
A warning triangle with text in the display indicates an alarm. Turn menu selector to the warning triangle and press con-
firm twice to view the alarm.
4.1 Alarm list
Alarm Explanation Do the following
Fan
Indicates error on either supply or
extract air fan.
The alarm is displayed in the control panel.
Check that quick connectors are connected for the both fans.
Contact your installation company or place of purchase.
EMT/Frost
Indicates triggered frost protection (in
case of installed water heating
battery) or triggered overheat
protection (in case of installed electric
re-heater battery).
A triggered frost protection alarm results in the following:
• Both fans stop.
• Outdoor and exhaust air dampers closed.
• Water valve opens completely (10 V signal goes out to
the actuator).
The unit will restart once the water temperature reaches +5°
C above the set frost protection temperature.
A triggered over heat protection (EMT) gives an alarm in the
control panel.
Reset by pushing the reset button. See chapter .
If the problem continues contact your installation company
or place of purchase.
Rot
Indicates a rotor malfunction. The alarm is displayed in the control panel.
• If the rotating heat exchanger has stopped. Check the
rotor belt. See chapter
• If the heat exchanger is still rotating, check that the quick
connector for the sensor is connected and that there is an
air gap of 5-10mm between the sensor and the magnet.
Adjust the gap if necessary.
If the alarm persists, the rotor sensor may be faulty.
Contact your installation company or place of purchase.
Pb Fail
Error in connection with relay card for
the electrical re-heater (if installed
and activated).
The overheat protection sensor,
automatic reset (ET2) may be
triggered due to high temperature.
The alarm is displayed in the control panel.
The heater will not be activated.
For triggered ET2, wait 10–15 min. If the error remains,
contact your installation company or place of purchase.
Temp
Malfunction in one or more of the
temperature sensors.
The alarm is displayed in the control panel.
Contact your installation company or place of purchase.
Filter
Time for filter change. The alarm is displayed in the control panel.
Change filter according to the instructions in the User
Manual.
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