Bosch rexroth HS5E Instruction Manual page 99

Table 28: Malfunction table of HS5E control systems
Malfunction
Pressure statically at approx
5...12 bar, cannot be changed
Pressure too low
Pressure too high
Insufficient flow
Troubleshooting | A4... with HS5E(V)(L) control system Series 1x and 30
Possible cause
Supply voltage not within the permissible range
Diagnosis: Check the status LEDs
Command value for pressure, swivel angle or
power (optional) is 0 bar or 0%, respectively
Swivel angle sensor defective
Piston is stuck in the HS5E pilot control valve
Actual pressure value acquisition incorrectly
configured
Pressure transducer defective/not connected
Diagnosis: Measure signal from PT and compare
with indication on the pressure gauge
Control system does not work in closed-loop
pressure control
HS5E pilot control valve faulty
Actual pressure value acquisition incorrectly
configured
Pressure transducer defective/not connected
Diagnosis: Measure signal from PT and compare
with indication on the pressure gauge
HS5E pilot control valve faulty
Pressure controller active
Actual swivel angle acquisition improperly set
Rotational speed speed too low (slip, incorrect
frequency, wrong motor)
Damage to the pump (excessive pump leakage)
Wear/mechanical damage to the control system
Remedy
Check, whether the central connector XH4
is connected to the HS5E pilot control valve
Check voltage at the last interconnection
point (terminal strip) upstream the HS5E
pilot control valve
If you use, for example, exclusively closed-
loop pressure control, provide a swivel angle
command value of 100%
Check swivel angle measurement,
see chapter 8.1.5.4 on page 73
Contact Rexroth Service
Check actual pressure value in IndraWorks
and, if required, correct configuration of
actual pressure value acquisition
Replace pressure transducer, see page 89
Change installation location of the pressure
transducer (do not install upstream of
the preload valve; if possible, close to the
consumer)
Replace pressure transducer, see page 89
Connect pressure transducer
Increase swivel angle command value
Check that the hydraulic system is leak-free
and that the withdrawal is not excessively
high
Replace the HS5E pilot control valve,
see chapter 10.5.1 on page 87
Check actual pressure value in IndraWorks
and, if required, correct configuration of
actual pressure value acquisition
Replace pressure transducer, see page 61
Replace pressure transducer, see page 61
Connect pressure transducer
Replace the HS5E pilot control valve,
see chapter 10.5.1 on page 87
Increase pressure command value
Recalibrate swivel angle sensor
Contact machine or system manufacturer
Rotary group damaged,
Contact Rexroth Service
Replace the control system, contact Rexroth
Service
RE 92076-01-B/2021-04-22, Bosch Rexroth AG
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