Note On Troubleshooting; Faults During Runway Operation; Faults During Operation Of Auxiliary Lift - Bosch VLS 5235 Original Instructions Manual

en 16 | VLS 5235 | Note on Troubleshooting
7.

Note on Troubleshooting

!
Should any faults occur which are not listed below, immediately de-energize the lifting platform, shut it down,
secure it against unauthorized use, and inform Bosch customer service or an authorized service outlet.
!
All repair work must be performed by Bosch customer service or an authorized service outlet. Only Bosch
genuine replacement parts may be used. The use of parts from other manufacturers will render the type
approval invalid.
7.1

Faults during runway operation

Fault Possible cause
R Power failure.
No motor operation.
R Synchronization control is deactivated.
R Motor overheating, thermoswitch
in motor has cut out.
R Control fuse/control electronics defective.
R Vehicle too heavy.
Motor operation but
runway not raised.
R Lack of fluid.
R Manual lowering valve open.
R Upper end position reached.
R Hydraulic system defective.
R Vehicle too heavy.
Runway raises
too slowly.
R Intake filter blocked.
R Hydraulic system defective.
R Mode selector switch in incorrect position.
Runway lowers too
R Detent locks are extended, runway is locked.
slowly or not at all.
R No vehicle on lifting platform.
R Hydraulic system defective.
R "Foot protection" safety level (200 mm)
Runway not
lowered fully. reached.
R Incorrect hydraulic fluid with insufficient
Noise during lifting
or lowering. lubrication.
R Inadequate lubrication of
scissor sliding surfaces.
7.2

Faults during operation of auxiliary lift

Fault Possible cause
R Refer to information for runway
No motor operation.
R Upper end position reached.
Motor operation
R Vehicle too heavy.
but auxiliary lift
not raised.
R Lack of fluid.
R Manual lowering valve open.
R Hydraulic system defective.
R Pneumatic cylinder not released.
auxiliary lift not
R Hydraulic system defective.
lowered.
R Incorrect hydraulic fluid with
Noise during lifting
or lowering. insufficient lubrication.
R Worn sliders at auxiliary lift.
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Remedy
R Check the power supply.
R Check/correct the relative position of the runways.
R Wait 10 minutes and try again.
R Request customer service.
R Check whether the permissible load-bearing capacity
of the lifting platform has been exceeded.
R Check the fluid level.
R Close manual lowering valve by hand
(for details please contact Bosch customer service).
R Request customer service.
R Check whether the permissible load-bearing capacity
of the lifting platform has been exceeded.
R Clean intake filter (service personnel).
R Request customer service.
R Rotate mode selector switch to the correct position.
R Raise the runway slightly to retract the detent locks.
R Request customer service.
R Press the "Lower" button again.
R Check the fluid type.
(Use organic hydraulic fluid)
R Lubricate the sliding surfaces.
R Request customer service.
Remedy
R Refer to information for runway
R Check whether the permissible load-bearing capacity
of the lifting platform has been exceeded.
R Check the fluid level.
R Close manual lowering valve by hand
(for details please contact Bosch customer service).
R Request customer service.
R Check compressed air supply.
R Request customer service.
R Check the fluid type.
(Use organic hydraulic fluid)
R Request customer service.
Robert Bosch GmbH