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Manufacture of FINESSE air curtains is very well controlled. There are many inter-operations inspections during the
process and the final inspection at the end, when all the functions of the air curtains are checked. After the functionality of the
air curtain is proven, then it can be dispatched to the customer. Our experience show that 99% of the claims is caused by
incorrect installation or connection. So it is necessary the air curtains are installed by persons acquainted with this manual
and the electric connection or water heat exchanger connection is done by authorised and specialised person.
Future troubles can be thus avoided.
Disconnect the air curtain from the mains before any service works !
General inspection when of malfunction.
1. Check the electric wiring, if it conforms to diagram in this manual or to that on the air curtain case.
2. Check the mains. Measure the voltage and current, if they conform to these on the index plate (on the air curtain case).
The zero conductor must be connected, too!
3. Check if any wire is not loose from the terminal.
4. Check if the connectors of the cable between controller and control electronic board properly fit to the connecting sockets
and if the correct connector (“CONTROL”) is used on the board (DA, DM versions). Try to use other cable supplied by the
manufacturer and try the function of the air curtain again (DA, DM) When the air curtain still does not work, change the
controller and try the air curtain again. Check the connection of wires into the controller at SM control type (the numbers of
terminal boards must fit) according to the wiring diagram.
5. There is a fuse in a holder on the connecting board. The rated value is printed ot the sticker below it. Remove the fuse by
using of screwdriver and check if blown. If so, change it for another one of the same rated value (see Fig.)
6. There is a fuse on the electronic board. Check if blown. If so, change it for another one of the same electric value.
7. Check all installation preconditions according to this manual are kept.
8. When all the effort to start the air curtain failed, call to the authorised service centre and provide them with all possible
details, e.g. type of the air curtain, type of control system, place of installation, mechanical and electrical conditions of
installation, duration of operation, etc.
Do not ever try to interfere into internal wiring of the air curtain or to modify any component thereof to avoid
permanent damage to the air curtain !
Other possible defects and troubles:
Air curtain blows but does not heat ?
This could happen under certain circumstances in case the air curtain is equipped with DA control system and is running in
automatic mode. Exact description of single states can be found in chapter “Air curtain operation”
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The other possible cause of malfunction of the electric heater is that the operation thermostat with automatic reset has
switched the overheated heater off. This situation is not indicated on any type of control systems. When the heater cools
down, it is automatically restarted. In any case, it is necessary to find the reason of overheating, which can be namely:
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Non-keeping of recommended distances at installation of the air curtain (see “ Conditions of operation and safe
function”.
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Clogged filter. It is necessary to clean or replace the filter (see “Air curtain maintenance”)
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Defective fan. It is necessary to call the authorised service centre and to change the fan.
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Just one phase connected. It is necessary to connect the air curtain to all three phases according to the wiring diagram.
The air curtain dos not provide enough amount of air ?
This situation can happen in case the thermo-contact of one of the fans stops its operation due to overheating or the fan itself
is damaged. It is necessary to remove the cause or replace the fan this must be done by authorised person only.
Filter may be clogged. This defect announces itself by higher noise level generated by the air curtain. It is necessary to clean
the filter or replace it (see “Air curtain maintenance”). Other possible cause of that may be the non keeping of the
recommended distances at installation of the air curtain (see “ Conditions for safety and proper function of the air curtain”).
Air curtain does not blow air at all ?
This could happen under certain circumstances in case the air curtain is equipped with DA control system and is running in
automatic mode. Exact description of single
states can be found in chapter “Air curtain operation”. The other possible cause of this malfunction is the defect of
transformer in the air curtain. This is often accompanied by bad smell coming out from the air curtain. Check the transformer,
in case of the defective one it must be changed by authorised person only. Also could happen that all the fans are
overheated or broken. However this is very rare case.
Controller to the air curtain does not work ?
Check proper wiring to the controller. When of SS control system check the connection of all wires to the proper terminals.
Often two cables can be exchanged and in such a case the controller does not work. When of DM and DA control systems it
“CONTROL” is necessary to connect the control cable to CONTROL terminal on the electronics board. Notice: Do not
connect to SLAVE terminal. Always use original cable delivered by the manufacturer for interconnection of DM and DA
controllers. Check the cable if it is not damaged (see “GENERAL INSPECTION”).
TROUBLESHOOTING
OPERATION INSTRUCTIONS
Terminal board
(SM)
Cable from controller
to “CONTROL” at DM, DA
Fuse on the electronic
board
Main fuse
CLICK
Wiring diagram