27
www.ventilation-system.com
POSSIBLE FAULTS AND TROUBLESHOOTING
Problem
Possible reasons
Спосіб усунення
Fan(s) will not start on unit
power-up.
No power supply.
Make sure the power supply line is connected correctly, otherwise
troubleshoot a connection error.
Motor jammed, impeller blades dirty.
Turn the unit off. Troubleshoot the motor jam and the impeller
clogging. Clean the blades. Restart the unit.
System alarm.
Identify the system failure by entering the active alarms menu and
remedy the problem.
If the system failure may not be remedied without enlisting expert
help contact the Seller.
Unit in Defrosting mode.
While in the Defrosting mode the fans are disabled.
Abnormal noise or vibration.
High current consumption caused by a short circuit.
Turn the unit off. Contact the Seller.
Water leakage.
Fan speed set too low.
Set higher speed.
Filters, fans or heat exchanger dirty.
Clean or replace the filters, clean the fans and the heat exchanger.
Ventilation system elements (air ducts, diffusers, louver shutters,
grilles) clogged, damaged or closed.
Clean or replace the ventilation system elements, such as air ducts,
diffusers, louvre shutters, grilles.
Холодный приточный воздух.
Exhaust filter dirty.
Clean or replace the extract filter.
Unit in Cooling mode.
Check the unit operation settings.
Heat pump malfunction.
Turn the unit off. Contact the Seller.
Повышенный шум, вибрация.
Impeller(s) dirty.
Clean the impeller(s).
Compressor damaged.
Turn the unit off. Contact the Seller.
Loose screw fastenings of fan or casing.
Tighten the screw connection of the fans or the casing against stop.
No anti-vibration connector on air duct pipe flanges.
Install anti-vibration connectors.
Утечка воды.
Drain pipe clogged, damaged or improperly installed.
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.
Авария по давлению
Unit operation outside the permissible temperature range.
Ensure proper temperature at the unit mounting location.
Insufficient air flow rate.
See "Alarm": low air flow.
Pressure sensor failure.
Turn the unit off. Contact the Seller.
Refrigerant agent level too low.
Turn the unit off. Contact the Seller.
To clean the heat-transfer unites remove the heat exchanger from the unit and blow the heat-transfer unites with compressed air or use a
vacuum cleaner. After cleaning re-install the heat exchanger into the unit.
4.
Fan maintenance (once per year).
Even in case of regular maintenance of the filters, some dust may accumulate inside the fans and reduce the fan performance and supply air
flow.
Clean the fans with a soft cloth or brush. Do not use water, aggressive solvents or sharp objects as they may damage the impeller.
5.
Condensate drainage maintenance (once per year).
The condensate drainage (drain line) may get clogged by dirt and dust particles contained in the exhaust air. Check the drain line operation by
filling the drain pan under the unit with water, clean the U-trap and the drain line, if necessary.
The unit design allows condensate drain pan cleaning. If necessary, the drain pans can be removed for thorough washing.
6.
Supply air flow control (twice per year).
The supply duct grille may get clogged with leaves and other objects reducing the unit performance and supply air delivery. Check the supply
grille twice per year and clean it as required.
7.
Ductwork system maintenance (once in 5 years).
Even regular fulfilling of all the prescribed above maintenance operations may not completely prevent dirt accumulation in the air ducts which
leads to air pollution and reduces the unit capacity. Duct maintenance means regular cleaning or replacement.
Store the unit in the manufacturer’s original packing box in a dry closed ventilated premise with temperature range from +5 °C to + 40°C.
Storage environment must not contain aggressive vapours and chemical mixtures provoking corrosion, insulation and sealing deformation.
Use hoist machinery for handling and transportation to prevent possible mechanical damages of the unit.
TROUBLESHOOTING
STORAGE AND TRANSPORTATION REGULATIONS
Summary of Contents for VUT R 400 TN EH EC A17
Page 31: ...31 ...
Page 32: ...V107EN 02 ...
