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3. 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 a brush.
Do not use water, aggressive solvents, or sharp objects as they may damage the impeller.
4. 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.
5. Ductwork system maintenance (once in 5 years).
Even regular fulfilling of all the maintenance operations prescribed above 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.
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. System alarms are listed below.
Identify the system failure by entering the active alarms
menu and eliminate the alarm.
If the system alarm cannot be eliminated by the user, contact
the Seller.
Automatic circuit breaker
tripping when the unit is
switched on.
High current consumption due to short circuit in power
line.
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.
The unit operates in Cooling mode.
Check the unit operation settings.
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
against stop.
No anti-vibration connectors on air duct pipe flanges.
Install anti-vibration connectors.
Room terminal is faulty.
No connection with a control panel.
Check the connection of the controller with the control
panel. Contact the Seller.