Fault Table - Bosch rexroth SYDFE1 2X Series Operating Instructions Manual

Table 19: Malfunction table for SYDFE1 control systems
Malfunction
Error message present:
Indicator lamp "Err." on the
front panel of the VT 5041-3X
is ON
Humming noise in the pressure
control or fluctuations in
pressure/flow
Screaming noise
Troubleshooting | Pressure and flow control system SYDFE1 series 2X, 3X
15.2

FAULT TABLE

Possible cause
Enable not granted: Indicator lamp "En." is
out.
Supply voltage missing or fuse F1 defective:
Indicator lamp "Ub" is out
Cable break of the swivel angle sensor cable
Cable break of the valve position sensor cable
Cable break of the proportional solenoid cable Check wiring (see 7.6.6 "Connecting the
When monitoring of the control error is
activated (jumper J9 set/ON), excessive
control error (valve command value > +4 V or <
-4 V) for longer than 1 sec.
Defect or short-circuit of auxiliary voltages on
the control electronics
Air cushion around the sensor
Problem with the cable shield
Unfavorable place of installation/mounting
technique for the pressure transducer
Improperly high gain of the actual pressure
value
Oil level in the tank too low; pump partly
aspires air
Pump aspires air
Suction line leaky
Pump cavitates when pressure is reduced
Diagnostics: Measure, whether overshoots
occur in the pressure line at individual
pressure levels, e.g. pressure almost 0 bar
and, at the same time, negative swivel angle
Fluid in the tank mixed with air; cooling and/or
filtration circuit leaky
Remedy
Apply 24 V to contact 26c
Apply 24 V to contact 32a, connect 28a to
ground (0 V)
Check wiring (see 7.6.5 "Connecting the
swivel angle sensor", page 57)
Check wiring (see 7.6.4 "Connecting the
valve position transducer", page 55)
solenoid of the proportional valve", page
58)
For further notes, see page 63.
Contact Rexroth Service
Bleed control system, pre-load valve (see
8.1.8 on page 67) and pipes completely
Connect shield to ground
Change place of installation (e.g.
suspended mounting, no minimess line,
no throttling point between pump and
pressure transducer)
Reduce weighting of the actual pressure
value and pressure command value, see
page 68
Top up oil
Change routing of the suction line
Seal suction line
Optimize controller, reduce command value
via a ramp or in steps.
Seal
RE 30011-B, Edition 10.2021, Bosch Rexroth AG
85/96