Bosch REXROTH A4VSO User Manual

94/104 Troubleshooting
Bosch Rexroth AG, A4... with HS5E pilot control valve/Series 3x, RE 92076-01-B/10.2017
Table 27: Malfunction table of HS5E control systems
Malfunction Possible cause Remedy
Pressure too low Actual pressure value acquisition incorrectly
configured
Check actual pressure value in IndraWorks
and, if required, correct configuration of actual
pressure value acquisition
Replace pressure transducer, see page83
Change installation location of the pressure
transducer (do not install upstream of
the preload valve; if possible, close to the
consumer)
Pressure transducer defective/not connected
Diagnosis: Measure signal from PT and compare
with indication on the pressure gauge
Replace pressure transducer, see page83
Connect pressure transducer
Control system does not work in closed-loop
pressure control
Increase swivel angle command value
Check that the hydraulic system is leak-free
and that the withdrawal is not excessively high
Pilot valve defective Replace pilot valve, see chapter"10.5.1"
on page82
Pressure too high Actual pressure value acquisition incorrectly
configured
Check actual pressure value in IndraWorks
and, if required, correct configuration of actual
pressure value acquisition
Replace pressure transducer, see page 58
Pressure transducer defective/not connected
Diagnosis: Measure signal from PT and compare
with indication on the pressure gauge
Replace pressure transducer, see page 58
Connect pressure transducer
Pilot valve defective Replace pilot valve, see chapter"10.5.1"
on page82
Insufficient flow Pressure controller active Increase pressure command value
Actual swivel angle acquisition improperly set Recalibrate swivel angle sensor
Drive speed too low (slip, incorrect frequency,
wrong motor)
Contact machine or system manufacturer
Damage to the pump (excessive pump leakage) Rotary group damaged,
Contact Rexroth Service
Wear/mechanical damage to the control system Replace the control system, contact Rexroth
Service.
Drive motor shuts down due
to overloading
Excessive power consumption of the pump Reduce torque limit
Reduce swivel angle command value
Check actual pressure value acquisition
Overcurrent protection of motor does not work
properly
Check setting and function
Spool jams in pilot valve
Diagnosis: Compare actual value and valve command
value in IndraWorks
Replace pilot valve, see chapter"10.5.1"
on page82
Actual swivel angle value acquisition maladjusted
or not working properly
Swivel angle measurement check
Valve electronics defective Replace pilot valve, see chapter"10.5.1"
on page82

Bosch REXROTH A4VSO Specifications

General

Brand	Bosch
Model	REXROTH A4VSO
Category	Water Pump
Language	English