L
-B
A
L-
E053
-G
B
-0
838
I
nd
e
x 00
1
(78453E
)
L
-B
A
L-
E053
-G
B
-0
838
I
nd
e
x 00
1
(78453E
)
6 Failure causes and their rectification
6.1 No display
Should a power failure occur, to save energy, although the
device no longer makes any display, the internal clock will
continue to run for at least 4 hours.
Consequently, first test whether the cause for the power failure
lies in the distribution cabinet (Circuit-breakers and ground-
fault circuit interrupter activated?). If everything is correct there
and no general power failure has occurred, please contact your
electrician so that he can find the cause.
Warning:
The device operates with line voltage. You must
not open it yourself!
6.2 FAIL displayed
The external sensor attached to the device is defective. In this
case; call your electrician so that he can find and correct the
cause.
Warning:
The device operates with line voltage. You must
not open it yourself!
6.3 –– –– displayed when a key is pressed
The keyboard of the device is locked. If required, unlock the
keyboard as described in Section 4.4.
6.4 Output is not triggered
If the output is not triggered as expected, this can have
several causes. A set minimum switching time, a set upper or
lower limit temperature may still be acting. It is also possible
that the device briefly triggered the output to avoid the load
from sticking (actuators).
Wait several minutes to determine whether the output
assumes the expected state. If this does not occur, please
contact your electrician so that he can find the cause.
Warning:
The device operates with line voltage. You must
not open it yourself!
- 13 -
6 Failure causes and their rectification
6.1 No display
Should a power failure occur, to save energy, although the
device no longer makes any display, the internal clock will
continue to run for at least 4 hours.
Consequently, first test whether the cause for the power failure
lies in the distribution cabinet (Circuit-breakers and ground-
fault circuit interrupter activated?). If everything is correct there
and no general power failure has occurred, please contact your
electrician so that he can find the cause.
Warning:
The device operates with line voltage. You must
not open it yourself!
6.2 FAIL displayed
The external sensor attached to the device is defective. In this
case; call your electrician so that he can find and correct the
cause.
Warning:
The device operates with line voltage. You must
not open it yourself!
6.3 –– –– displayed when a key is pressed
The keyboard of the device is locked. If required, unlock the
keyboard as described in Section 4.4.
6.4 Output is not triggered
If the output is not triggered as expected, this can have
several causes. A set minimum switching time, a set upper or
lower limit temperature may still be acting. It is also possible
that the device briefly triggered the output to avoid the load
from sticking (actuators).
Wait several minutes to determine whether the output
assumes the expected state. If this does not occur, please
contact your electrician so that he can find the cause.
Warning:
The device operates with line voltage. You must
not open it yourself!
- 13 -
