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 > pmax intermittend
Feedback from hydraulic system
Observe the allowed pressure peaks de‐
scribed in "RE 10227 (PGH.-3X) / RE
10223 (PGH.-2X) / RE 10213 (PGF)"
during project planning.
Integrate pressure control valves
The system interfaces cannot be
mounted
Wrong connection flanges/screws suc‐
tion port and/or pressure connection
selected
Observe the dimensions of the flange
described in "RE 10227 (PGH.-3X) / RE
10223 (PGH.-2X) / RE 10213 (PGF)"
during project planning.
Viscosity <10 mm
2
/s
Hydraulic fluid too hot
Information on hydraulic fluids in RE
90220; observe the project planning in‐
formation in "RD 10227 (PGH.-3X) / RD
10223 (PGH.-2X) / RD 10213 (PGF)";
check the water content, viscosity, tur‐
bidity 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 "RD 10227 (PGH.-3X) / RD
10223 (PGH.-2X) / RD 10213 (PGF)";
check the water content, viscosity, tur‐
bidity and smell on a regular basis
Wrong hydraulic fluid filled in
Thickening due to mixing
Bosch Rexroth AG
DOK-SYTROX-MPES2******-IT01-EN-P
Rexroth Sytronix FcP 50xx/70xx Motor-Pump Unit MPES2
90/143
Troubleshooting
LSA Control S.L. www.lsa-control.com [email protected] (+34) 960 62 43 01