20
Table 5
Problem
Possible reasons
Fault handling
The fan(s) do(es)
not get started.
No power supply.
Make sure the power supply line is connected correctly, otherwise
troubleshoot the connection error.
Motor is jammed, the blades are soiled.
Turn the unit off. Troubleshoot the motor jamming. Clean the blades.
Restart the unit.
Alarm in the system.
Remove the system alarm. Restart the unit.
Automatic circuit
breaker tripping.
High current consumption due to short circuit in
power line.
Turn the unit off. Contact the service centre.
Low air flow.
Low set air flow.
Switch the unit to higher speed.
Filters, fans or the heat exchanger are soiled.
Clean or replace the filters; clean the fan(s) and the heat exchanger.
The ventilation system components (air ducts,
diffusers, louvre shutters, grilles) are soiled or
damaged.
Clean or replace the ventilation system components (air ducts, diffusers,
louver shutters, grilles).
Air dampers, diffusers or louvre shutters are
closed.
Make sure that the air dampers, diffusers or louver shutters are fully
opened.
Cold supply air.
The extract filter is soiled.
Clean or replace the extract filter.
The heat exchanger is frozen.
Check the heat exchanger for freezing. Turn the unit off if required and
restart it after the freezing danger is no longer imminent.
Malfunction of the water heater.
Contact the service centre.
High noise,
vibration.
The impeller(s) is clogged.
Clean the impeller(s).
Loose screw tightening.
Tighten the screws.
No anti-vibration mounts.
Install the rubber anti-vibration mounts (not included into delivery set).
Water leakage.
The drainage system is soiled, damaged or
arranged not correctly.
Clean the drainage system. Check the drain line slope angle. Make sure
that the U-trap is filled with water and the drain pipes are frost protected.
Faults and fault handling
FAULT HANDLING
STORAGE AND TRANSPORTATION RULES
Store the unit in the manufacturer’s original packing box in a closed ventilated premise with temperature range from +10 °C to + 40 °C
and relative humidity maximum 60 % (at +20 °C).
Vapours or particles which can cause corrosion or damage the insulation or connection tightness are not allowed in the storage
environment.
Use hoist machinery for handling and transportation to prevent possible mechanical damages of the unit. Fulfill the requirements for
transportation of the specified cargo type during cargo-handling operations.
Use any vehicle types for the unit transportation provided that it is protected against mechanical or weather damage. Avoid any
mechanical shocks and strokes during handling operations.
