F
AULTS
C
OMFORT
A
IR
C
URTAIN
52
5
. . Faults
5.1
Safety instructions
Danger:
d
Work on the unit’s interior shall be performed by
qualified technical staff only.
Warning:
w
Before opening the unit: Observe the safety
instructions in section
1.5
.
5.2
Resolving simple problems
If you suspect a fault, first try to resolve the problem using the
below table. You need not be an expert for this.
P
ROBLEM
L
IKELY
CAUSE
W
HAT
TO
DO
The unit does not work, and the
control panel display is blank.
The unit is switched off.
Activate the display by touching.
No power supply to the control
panel.
Check the power supply:
• plug in power point;
• isolation switch;
• unit live.
The display is on, but does not
react to touch.
If the
#
symbol is shown on the
display:
The display is locked.
Touch the screen for 5 seconds to
unlock.
The air curtain is switched Off
but is still working.
Only electrically-heated models:
unit
is cooling down automatically.
This is not a fault. Normally, the
unit will automatically shut down
within 10 minutes.
The unit blows out cold air
(without fault message).
If the air current on the display is
blue:
Heating is switched off.
Switch the heating on via
Menu
>
Heating
The discharge temperature is
dependent on the indoor and
outdoor temperature
This is not a fault. If this is
considered a problem, the value
of function
84. Heating off
temperature
can be increased.
The unit is on but the fans are
not running.
The fans may be switched off if
there is only a small difference in
temperature between indoors
and outdoors.
This is not a fault. If this is
considered a problem, the value
of function
80. Fan off
temperature
can be set to zero.
