U
SER
’
S
AND
I
NSTALLER
’
S
M
ANUAL
F
AULTS
Version: 4.0 (23-08-2007)
49
E2
The control panel is live but does
not communicate with any unit.
1.
Reset the control panel (see section
6.3.3
).
2.
Check the control cables:
-
are they connected correctly and free from breaks?
-
are they stretched out or rolled up neatly?
-
are they shielded from magnetic fields?
3.
Check wiring between connector plate and connec-
tors X380 and X390 on the printed circuit board.
E3
Electrically-heated models:
The control in the unit detected a
too high temperature, and switched
the heating off, or the temperature
sensor (PTC) does not work.
If you disregard this fault,
damage to the unit may occur.
1.
Delete the fault message (see section
6.3.2
).
2.
Check the fans. If one or more fans do not work,
check:
-
the fan wiring;
-
the connections on the printed circuit board (con-
nectors X130, X120 and X110);
-
the transformer fuse;
-
the transformer itself.
If these are OK, replace the fan.
3.
Check the PTC wiring and connection.
If these are OK, replace the PTC.
E4
Electrically-heated models:
The high-limit thermostat switched
the unit Off: this is to protect
against overheating.
This fault may occur:
• if the unit has been temporarily
dead, e.g., due to a power fail-
ure;
• if the filter is dirty and lets
insufficient air through.
In other cases, there may be a
serious defect that may pose a
risk to persons.
1.
Delete the fault message (see section
6.3.2
).
2.
Check the fans. If one or more fans do not work,
check:
-
the fan wiring;
-
the connections on the printed circuit board (con-
nectors X130, X120 and X110);
-
the transformer fuse;
-
the transformer itself.
If these are OK, replace the fan.
3.
Check the filter for contamination. Clean or replace it
if necessary.
Contact Biddle if this fault occurs more often.
C
ODE
L
IKELY
CAUSE
W
HAT
TO
DO