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FAULTS COMFORT AIR CURTAIN

en-34

Not all connected units are working

(or only partially).

The control panel is not communi-

cating with one or more connected

units (or with one of the control

PCBs in a dual-PCB unit).

1. Check if power is supplied to all

connected units.

2. Check the control cables:

• are they connected and free

from breaks?

• are they stretched out or

rolled up neatly?

• are they shielded from

magnetic fields?

3. Check the control PCB’s fuses in

each connected unit.

4. Check wiring between

Connectors

E and H and the

control PCB(s).

If multiple units have been con-

nected to a single control panel:

Units (or part of a unit) are not

responding immediately to the

external control (door contact

switch or BMS).

The master unit (or the master

control PCB in a dual-PCB unit) has

not been configured properly.

Check that the unit to which the

external control has been con-

nected has been configured as the

master.

For dual-PCB units:

Check whether the PCB on the

connection side has been config-

ured as the master.

The contact on the external control

input is open.

Check the input bridges on the

units to which no external controls

have been connected.

For dual-PCB units:

Check the input bridge on the sec-

ondary PCB.

The unit is blowing out cold air. For water-heated units:

The unit is not being supplied any

hot water.

1. Check the central heating sys-

tem.

2. Check whether the valve is

allowing hot water to pass.

3. Check valve drive and inlet air

temperature sensor wiring and

connectors.

4. Take the drive from the valve,

and check the interior for

mechanical operation and

defects.

ROBLEM POSSIBLE CAUSE RESOLUTION

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Biddle DF Specifiche Pagina 34

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Biddle DF Specifiche Pagina 34

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