FWD
Ducted fan units
4PW17549-3
Installation and operation manual
Cleaning the air lter
Cut voltage to the unit by turning the line switch to OFF.
For cleaning the air lter proceed as follows (see gure 6)
n Access the equipment through the inspection panel and remove
the air lter as shown in gure 8 by unscrewing the xing knobs.
n Otherwise, if the lter is inside the intake grid, remove the grid and
carry out the operations described below.
(See gure 8)
1 Intake module with lter
2
Air lter, secured to the intake module by means of screws, it
is pulled out like a drawer.
n Wash the lter with lukewarm water or, for dry powders, with com-
pressed air.
n Reassemble the lter after having it dried up.
Cleaning the heat exchanger
It is advisable to check the condition of the heat exchanger before the
start of the summer season. Also check if the ns are not clogged by
impurities.
To access the heat exchanger, remove the delivery panel and the con-
densate tank. Upon having accessed the heat exchanger, clean with
compressed air or low pressure steam, without damaging the ns of
the heat exchanger.
Before operating it in the summer, check the condensate discharges
regularly.
NOTE
Adequate and regular maintenance and cleaning
means energy conservation and cost saving.
Dismantling of the unit should be done in accordance with the relevant
local and national regulations.
If the unit does not work properly rst check the points reported in the
table below before requesting service.
If the problem cannot be solved contact your dealer or service centre.
Symptom 1: The unit does not run at all
Possible causes corrective action
Power failure Restore power
The automatic circuit breaker tripped Contact service centre
The switch is on STOP (“0”) position Turn ON the unit, select “I”
Symptom 2: Poor cooling or heating performance
Possible causes corrective action
Dirty or clogged air lter Clean the air lter
Obstacle near the air inlet or outlet Remove the obstacle
Air inside the heat exchanger Contact the installer
Doors and windows are open Close doors and windows
The unit is running at low speed Select medium or high fan speed
Symptom 3: The unit leaks
Possible causes corrective action
The unit is not installed with the
correct inclination
Contact the installer
The condensate discharge is
clogged
Contact the installer
Units are marked with the following symbol:
This means that electrical and electronic products may not be mixed with
unsorted household waste. Do NOT try to dismantle the system yourself: the
dismantling of the system, treatment of the refrigerant, of oil and of other parts
must be done by an authorized installer and must comply with applicable
legislation. Units must be treated at a specialized treatment facility for reuse,
recycling and recovery. By ensuring this product is disposed of correctly, you will
help to prevent potential negative consequences for the environment and human
health. For more information, contact your installer or local authority.
4
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