Bosch VLE 21 Series, Repair Instructions

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1 689 975 224 2013-11-06
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Robert Bosch GmbH
EEPROM | VLE 21xx | 37 en
5.4 Fault indication
5.4.1 Position "0": Operation basic setting
1. Set the encoding switch to position "0" and press
the Enter button.
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The LEDs briefly go out whilst pressing the button
and light in green when it is released.
2. Both lifting carriages move upwards on pressing the
"Lift" ("Heben") button; both LEDs light in red.
3. Both lifting carriages move downwards on pressing
the "Lower" ("Senken") button; both LEDs light in
orange.
Possible faults: See Table 5.
Problem Cause Remedy
Both LEDs light (red). Fault in EEPROM. The parameters must be reset by means
of jumper and the control system then
re-calibrated. If this does not solve the
problem, the control system must be
replaced.
Simultaneous orange/green flashing of
both LEDs.
The control system must be initialised. Set the encoding switch to position "8" and
perform calibration.
Alternating red/green flashing of one or
both LEDs.
Speed below minimum. Switch control system off/on. Check the
mechanical system if the fault persists.
Red flashing of one or both LEDs. Upper end stop of corresponding column
reached.
The column can then only be lowered.
Orange flashing of one or both LEDs. Lower end stop of corresponding column
reached.
The column can then only be raised.
Both motors come to an abrupt halt on
moving downwards, however the LEDs
remain lit (orange).
Stopping point reached. Release buttons and press again.
The alarm generator sounds on moving
downwards.
Height below stopping point. It is normal for the alarm generator to sound
beneath the stopping point when moving
downwards.
One of the motors briefly stops during
movement, the corresponding LED lights
(green).
Control system re-synchronising columns. This action is normal.
Red flashing of one or both LEDs and the
alarm generator sounds.
Overshoot beyond upper end stop of
corresponding column.
The lifting platform must be re-calibrated,
further operation not possible.
Orange flashing of one or both LEDs and
the alarm generator sounds.
Overshoot beyond lower end stop of
corresponding column.
The lifting platform must be re-calibrated,
further operation not possible.
Alternating orange/red flashing of both
LEDs and the alarm generator sounds.
Exceeding of maximum permissible
misalignment between the columns.
The lifting platform must be re-calibrated,
further operation not possible.
Alarm generator sounds briefly (3x) after
switch-on.
Incorrect setting of internal real time
clock.
Adjust the clock with the PC configuration
software.
LED1 off, LED2 lights (red). Program memory defective. Interrupt power supply. If the problem still
persists: Replace the control board.
Alternating orange/green flashing of both
LEDs.
Parameters not in sequence "Lower
end value < Stopping point < Upper end
value".
Re-calibrate end stops and stopping point.
Tab. 5: Possible faults in encoding switch position "0"