22
VUT 300 (301) EV(K) mini EC
FAULT HANDLING
Problem
Possible reasons
Fault handling
The fans do not
get started
No power supply.
Make sure the power supply line
is connected correctly, otherwise
troubleshoot the connection error.
Cold supply air.
The extract filter is soiled.
Clean or replace the extract filter.
The heat exchanger is frozen.
Check the heat exchanger for icing.
Shutdown the unit if required and turn it
on after the freezing danger is no longer
imminent.
The heater malfunction.
Please contact the service center.
Low set air flow.
The filters, the fans are soiled, the
heat exchanger is soiled.
Clean or replace the filters; clean the fans
and the heat exchanger.
The ventilation system is soiled or
damaged.
Check opening of the diffusers and louvre
shutters, check the extract hood and
supply grille and clean it of required; make
sure the air ducts are not soiled and not
damaged.
Low air flow
when the kitchen
hood operates
The fat filter is clogged
Clean the metal fat filter.
Noise, vibration
The impeller is clogged.
Clean the fan impeller.
Loose screw tightening.
Tighten the screws to stop.
Water leakage.
The drain system is soiled,
damaged or wrong arranged or
wrong slope angle of the unit
toward the drain system.
Clean the drain system.
Check the drain slope angle. Make sure
that the U-trap is filled with water and the
drain pipes are frost protected.
Possible faults and fault handling
