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22
FAULT HANDLING
Problem
The fans do not
get started
Cold supply air.
Low set air flow.
Low air flow
when the kitchen
hood operates
Noise, vibration
Water leakage.
Possible faults and fault handling
Possible reasons
No power supply.
The extract filter is soiled.
The heat exchanger is frozen.
The heater malfunction.
The filters, the fans are soiled, the
heat exchanger is soiled.
The ventilation system is soiled or
damaged.
The fat filter is clogged
The impeller is clogged.
Loose screw tightening.
The drain system is soiled,
damaged or wrong arranged or
wrong slope angle of the unit
toward the drain system.
VUT 300 (301) EV(K) mini EC
Fault handling
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.
Shutdown the unit if required and turn it
on after the freezing danger is no longer
imminent.
Please contact the service center.
Clean or replace the filters; clean the fans
and the heat exchanger.
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.
Clean the metal fat filter.
Clean the fan impeller.
Tighten the screws to stop.
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.
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