Braking System EBRA20
Operating instruction
6.3 Carrying out repairs
As a rule, the safety gear should neither be
taken apart or altered in any other way
(sealants, sealing wax). This also applies to
repairs. An exception to this is the electri-
fication (e.g. due to reconstruction work
etc). Condition for this, is that the process
is carried out properly and functioning is
in no way compromised.
It is forbidden to replace faulty or worn
parts of the EBRA20 brake yourself.
The reasons are:
• conditions of liability and technical safety
• only original replacement parts may be
installed (these are available from manufac-
turer only).
Operation of the system without the safe-
ty gear, even for short periods of time, is
forbidden.
Permitted repair work:
Repairs to the braking system which do not direct-
ly affect the brake (e.g. electrification, sliding ele-
ments) must be carried out locally. In other words,
all procedures involved in initial installation are
also included in the repairs and maintenance
schedule.
Such repair work in the safety system must, of
course, be carried out correctly and with utmost
care, in order to guarantee long-term safe opera-
tion of the system.
Please contact WITTUR if for any reason
something is unclear, or you encounter
damage that cannot be repaired with the
help of these instructions.
6.4 Fault finding
Elevator does not move, even if EBRA20 is open
• Check that the contact (1) is closed when the
EBRA20 is open
EBRA20 does not open, even if the power is ON
• Check the outputs from EBRA control (refer to following sketch):
Switching the power ON for X1
Outputs:
X2: 230 VAC; X3: 30 VAC; X5: 200 VDC (which drops to ~30 VDC 2 seconds after power ON
switching); X6 : ~30 VDC.
Blatt/
sheet
D7AJMGB.017
Datum/
date
23.05.2002
Stand/
version
B-24.05.2005
Geprüft/
approved
WAT/MZE
THE LMC LIFTCOMPONENTS MANUFACTURING AND COMMERCE COMPANY
Änderungen vorbehalten! Subject to change without notice!
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