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TROUBLESHOOTING
TROUBLES AND TROUBLESHOOTING
Problem
Possible reasons
Troubleshooting
The fan(s) does not start
when the unit is on
No power supply.
Make sure the power supply line is connected correctly,
otherwise troubleshoot the connection error.
The motor is jammed, the impeller blades are soiled.
Turn the unit off. Troubleshoot the motor jam and the
impeller clogging. Clean the blades. Restart the unit.
Alarm in the system.
Turn the unit off. Contact the Seller.
Automatic circuit breaker
trips following the unit
turning on
Overcurrent as a result of short circuit in the electric
circuit.
Turn the unit off. Contact the Seller.
Low air flow
Low set fan speed.
Set higher speed.
The filters and the fans are clogged, the heat exchanger
is clogged.
Clean or replace the filters, clean the fans, and the heat
exchanger.
Ventilation system elements (air ducts, diffusers, louver
shutters, grilles) are clogged, damaged, or closed.
Clean or replace the ventilation system elements, such as air
ducts, diffusers, louver shutters, grilles.
Cold supply air
The extract filter is soiled.
Clean or replace the extract filter.
Noise, vibration
The impeller(s) is soiled.
Clean the impeller(s).
The fan or casing screw connection is loose.
Tighten the screw connection of the fans or the casing all
the way.
No anti-vibration connectors on air duct pipe flanges.
Install anti-vibration connectors.
Water leakage (only for
the VUT 270 V5(B) EC
units)
The drainage system is soiled, damaged, or installed
incorrectly.
Clean the drain line if necessary.
Check the drain line slope angle. Make sure that the U-trap is
filled with water and the drain pipes are frost protected.
STORAGE AND TRANSPORTATION REGULATIONS
• Store the unit in the manufacturer’s original packaging box in a dry closed ventilated premise with temperature range +5 ...+40 ˚С
and relative humidity up to 70 %.
• Storage environment must not contain aggressive vapors and chemical mixtures provoking corrosion, insulation, and sealing
deformation.
• Use suitable hoist machinery for handling and storage operations to prevent possible damage to the unit.
• Follow the handling requirements applicable for the particular type of cargo.
• The unit can be carried in the original packaging by any mode of transport provided proper protection against precipitation and
mechanical damage. The unit must be transported only in the working position.
• Avoid sharp blows, scratches, or rough handling during loading and unloading.
• Prior to the initial power-up after transportation at low temperatures, allow the unit to warm up at operating temperature for at
least 3-4 hours.
