17
FAULTS AND FAULT HANDLING
Problem
Possible reasons
Fault handling
The fan(s) do(es) no
start.
No power supply.
Make sure the power supply line is connected correctly,
otherwise troubleshoot a 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.
For troubleshooting of the control system errors refer to the
control panel manual.
Automatic circuit
breaker tripping
following the unit
turning on.
Overcurrent resulted from 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 soiled, the heat
exchanger is soiled.
Clean or replace the filters. Clean the fans 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, louvre shutters, grilles).
The air dampers, diffusers or the louvre shutters
are closed.
Make sure that the air dampers, diffusers or louvre 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 Seller.
Noise, vibration.
The impeller(s) is soiled.
Clean the impeller(s).
The fan or casing screw connections are too
loose.
Tighten the screw connection of the fans or the casing
against stop.
No anti-vibration connectors.
Install anti-vibration connectors.
Water leakage.
The drainage system is soiled, damaged or
arranged not correctly.
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.
FAULT HANDLING
STORAGE AND TRANSPORTATION RULES
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.
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.
Fulfil the requirements for transportation of the specified cargo type.
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.
