F
AULTS
C
OMFORT
A
IR
C
URTAIN
50
E5
Electrically-heated models:
Heating does not stop because of a
faulty relay.
This may be a serious defect
that may pose a risk to persons.
1.
Delete the fault message (see section
6.3.2
).
2.
Switch the power supply to the unit Off and On.
3.
Let the air curtain work for some time with the heat-
ing disabled (see section
3.3
), and check if the dis-
charged air stays cold.
A dangerous defect is concerned if:
-
heating yet continues;
-
this fault message returns within 30 minutes;
-
this fault occurs frequently.
In any such case, act as follows:
-
disconnect the unit from the power supply immedi-
ately.
4.
contact Biddle.
E6
For water-heated models:
Risk of freezing because discharge
air temperature is too low. Frost
protection has been activated (see
section
2.5.2
).
Freezing may cause damage to
the heat exchanger.
1.
Ensure that the temperature in the room gets higher
than 8 ºC.
2.
Follow the instructions for fault code F3.
You can prevent this fault by allowing the unit to switch
the central heating system On in case of freezing risk (see
section
4.5.6
, option 15).
F1
Fault in air valve.
1.
Delete the fault message (see section
6.3.2
).
2.
Change the heating strength using the control panel,
and check if the air valve can move.
3.
Remove any obstacles from the air valve’s range.
4.
Check fuse F100 on the printed circuit board inside
the unit.
5.
Check wiring and connectors X140 and X210.
6.
Replace the valve drive.
F2
For water-heated models:
Overheating.
This fault may occur if the control
valve does not work correctly.
1.
Switch the air curtain Off using the control panel, wait
for one minute, and switch it On again.
2.
Check if the connections of the supply and return
pipes have not been interchanged.
3.
CA S/M: Check the LED on the valve drive: it should
come on when the unit is switched Off and On using
the control panel.
4.
Check the wiring and connectors of the valve drive
(X230) and the discharge air temperature sensor
(X350).
5.
Take the drive from the valve, and check the interior
for mechanical operation and defects.
C
ODE
L
IKELY
CAUSE
W
HAT
TO
DO