Vents VUT 300 V2 MINI EC A2 User Manual page 17

Problem
The fan(s) do(es) not get
No power supply.
started.
Extract filter clogging.
Cold supply air.
The heat exchanger is frosted.
The filters, fans or the heat exchanger are soiled.
Low air flow.
The ventilation system is soiled or damaged.
The fan impeller is soiled.
Noise, vibration.
The fan or casing screw connection is loose.
Water leakage
The drainage system is soiled, damaged, or
(only for
installed incorrectly.
VUT V2/H2 300 mini EC)
Communication loss in connecting cable or
The control panel
wires between the control panel and the unit.
displays an alarm
indicator –
(only for the units with
A14 automation)
Wrong cable installing.
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TROUBLESHOOTING
Possible reasons Troubleshooting
Make sure the power supply line is connected correctly, otherwise
troubleshoot the connection error.
Clean or replace the extract filter.
Check the heat exchanger for icing. Switch the unit off if required
and turn it on after the freezing danger is no longer imminent.
Clean or replace the filters, clean the fans and the heat exchanger.
Clean the ventilation system components. Replace the damaged
components.
Clean the impellers.
Tighten the screw connection of the fans or the casing against stop.
Clean the drain line. Check the drain line slope angle. Make sure that
the U-trap is filled with water and the drain pipes are frost protected.
Check the power and connection cables and wires between
the control panel and the air handling unit for integrity using a
multimeter.
If unassisted troubleshooting fails, please contact the product Seller.
Make sure the cable installation is completed according to the
requirements stated on page 14.
Otherwise, install the cable as required.
17