Malfunction
Possible cause
Remedy
Pump is too loud
See malfunctions "Interfaces not tight"
See malfunction"Wrong direction of rotation of the drive motor"
Ambient temperature is below -20 °C
Provide for suitable ambient tempera‐
tures
Aspiration of air bubbles
Bleed the system
Vortex generation in the suction area of
the fluid tank
Check the filling level of the fluid tank
See malfuntions "Viscosity <10 mm
2
/s"
See malfuntions "Viscosity >300 mm
2
/s"
Interfaces not tight
O-rings defective (wrong medium,
damage to the sealing, missing O-ring,
wrong O-ring)
Use original O-ring
Sealing surfaces contaminated or dam‐
aged.
Ensure cleanness and integrity of the
sealing surface.
Incorrect assembly (screws too long)
Assembly only by authorized, trained
and instructed qualified personnel; only
use original spare parts
Pressure peaks > 210 bar from system Feedback from hydraulic system
During project planning, observe the ad‐
missible pressure peak in RE 10235
Integrate pressure control valves
The system interfaces cannot be
mounted
Wrong connection flanges/screws suc‐
tion port and/or pressure connection
selected
Observe the flange dimensioning in RE
10235
Viscosity <10 mm
2
/s
Hydraulic fluid too hot
Information on hydraulic fluids in RE
90220; observe the project planning in‐
formation in RE 10235; check the water
content, viscosity, turbidity and smell on
a regular basis
Shelf life of the hydraulic fluid is excee‐
ded
Wrong hydraulic fluid filled in
Viscosity >300 mm
2
/s
Fluid temperature too low
Information on hydraulic fluids in RE
90220; observe the project planning in‐
formation in RE 10235; check the water
content, viscosity, turbidity and smell on
a regular basis
Wrong hydraulic fluid filled in
Thickening due to mixing
Volumetric or mechanical efficiency is
not achieved
See malfuntions "Viscosity >300 mm
2
/s"
See malfuntions "Viscosity <10 mm
2
/s"
See malfunctions "Output flow is not achieved"
Operation projected with too low and/or
too high speed
Observe the project planning information
in RE 10235
See malfunctions "Admissible level of contamination of the hydraulic fluid excee‐
ded"
Mixing of different fluids
Observe the information on hydraulic flu‐
ids in RE 90220
Bosch Rexroth AG
DOK-SYTROX-MPAS1******-IT01-EN-P
Rexroth Sytronix SvP 70xx Motor-Pump Unit MPAS1
64/83
Troubleshooting
LSA Control S.L. www.lsa-control.com comercial@lsa-control.com (+34) 960 62 43 01
