Bosch rexroth HS5E Instruction Manual page 97

Table 27: Axial piston unit malfunction table
Malfunction
Excessively high temperature of
hydraulic fluid and housing
Table 28: Malfunction table of HS5E control systems
Malfunction
Message "analog input, wire
break" at actual pressure value
input
Message "Wire rupture of swivel
angle sensor"
Message "Valve error pump
controller" (deviation between
command and actual position of
the valve spool)
Message "Control deviation
pump controller"
Start-up of the drive to the
"Ready for operation" operating
condition e.g. with current
signal 4...20 mA not possible
Troubleshooting | A4... with HS5E(V)(L) control system Series 1x and 30
Possible cause
Excessively high inlet temperature at the axial
piston unit
Wrong setting and/or malfunction of the
pressure limitation and pressure control valves
(e.g pressure controller)
Axial piston unit worn
Possible cause
Actual pressure value of the relevant pressure
transducer fell below or exceeded the limit value,
that is, the value is outside the permissible
measuring range of the A/D converter.
Defective swivel angle sensor cable (visual
inspection)
Defective swivel angle sensor
Internal electronics fault
Valve spool jams due to contamination
Internal electronics fault
Backpressure cannot be built up (minimum
pressure at the pump 8...10 bar)
Drive motor switched off or rotational speed too
low
Valve spool does not move as a result of
electronics fault
Valve spool jams due to contamination
Inputs at the central connector are configured as
current interface via IndraWorks
Remedy
Machine/system manufacturer: Inspect
system, e.g. malfunction in the cooler,
insufficient hydraulic fluid in the reservoir
Optimize the adjustment of the pressure
limitation and pressure control valves
of the axial piston unit and the pressure
safeguarding in the hydraulic system
Contact Bosch Rexroth Service
Contact machine/system manufacturer
Replace axial piston unit; contact Bosch
Rexroth Service
Remedy
Test actual pressure value signal (wire
rupture, working range, signal type,
polarity).
Replace swivel angle sensor
Replace swivel angle sensor
Have the HS5E pilot control valve repaired
by the Rexroth Service or replace the HS5E
pilot control valve
Replace the HS5E pilot control valve,
see chapter 10.5.1 on page 87
Replace the HS5E pilot control valve,
see chapter 10.5.1 on page 87
Check that the hydraulic system is leak-free
and that the withdrawal is not excessively
high
Check electrical control and motor control
Replace the HS5E pilot control valve,
see chapter 10.5.1 on page 87
Replace the HS5E pilot control valve,
see chapter 10.5.1 on page 87
Analog inputs at the central connector must
not be configured as a current interface.
RE 92076-01-B/2021-04-22, Bosch Rexroth AG
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