Overview Of The Impact Of Defects - Bosch Rexroth CytroPac Operating Instructions Manual

70/84 Troubleshooting
Table 11: Impact of defects
Error
Excessive noise level
Pressure fluctuations in the
pressure line.
Incorrect operating
pressure.
Pressure command value is
not reached or insufficient
flow.
Frequency converter
overload during operation.
Frequency converter
overload when
disconnecting hydraulic
actuators.
Bosch Rexroth AG, CytroPac, RE 51055-B/06.17

15.1.1 Overview of the impact of defects

Possible cause
Insufficient hydraulic fluid in the oil tank.
Hydraulic power unit is positioned on a
vibrating surface.
The hydraulic power unit is connected to
the machine via pipelines.
Vibration of the control system, e.g.
pressure controller.
Incorrect pressure command value
presetting.
Excessive pressure loss due to incorrect
dimensioning of hose lines.
Speed limit too low.
Drive insufficiently dimensioned.
Pressure relief valve set too high.
Generator-based drive effect
(due to rotor inertia).
Remedy
▶ Check the hydraulic fluid level.
▶ Check for and correct any leakage.
▶ As necessary, refill hydraulic fluid to ensure that
the filling level is between the markings on the
filling level indicator.
▶ Make sure that the hydraulic power unit is
positioned on a secure and non-vibrating surface.
▶ Route out the hydraulic connections between the
hydraulic power unit and the machine with hose lines.
▶ Check the controller settings and specifically
the parameters of the power amplification in
F3.12 following. For further information, refer to
chapter 7.7 "p/Q PID control" of the Sytronix quick
guide, see chapter 1.2 "Required and amending
documentation".
▶ Check and adjust the pressure command value as
applicable.
CytroPac "Basic" and "Advanced" configuration:
▶ Check parameter F1.05.
▶ If only one pressure rating is intended, make sure
that F1.03 and F1.04 are set to 0.
For further information, refer to chapter 7.3
"Pressure value processing" of the Sytronix quick
guide, see chapter 1.2 "Required and amending
documentation".
▶ Replace the hose lines against larger nominal
widths.
▶ As applicable, change the flow limitation parameter
F1.12. For further information, refer to chapter 7.2
"Flow command value processing" of the Sytronix
quick guide, see chapter 1.2 "Required and
amending documentation".
▶ Observe the maximum admissible speed of
the application (if necessary, contact the
Bosch Rexroth customer service).
▶ Check the motor current d0.98 and compare it with
the limit values for continuous load (1.5 kW 4.0 A;
2.2 kW 5.6 A; 3.0 kW 7.4 A; 4.0 kW 9.7 A).
▶ Make sure that the operating point is within the
continuous characteristic curves. For further
information on continuous characteristic curves,
refer to data sheet 51055, see chapter 1.2
"Required and amending documentation".
▶ Make sure that the pressure relief valve is set 10 %
over the operating pressure.
▶ Extend the delay ramp E0.27
.