Troubleshooting; Malfunction Table - Bosch Rexroth 4THE5 Series Instruction Manual

Table 7: Joystick malfunction table
Malfunction Occurrence possible
Proto 0 km
Joystick x x
does not
supply
a signal
x x
x x
x x
Joystick (x) x
supplies
incorrect or
x
no signal
x x

14 Troubleshooting

The Table 7 is intended to support troubleshooting. This table is not exhaustive.
Issues may occur in practice that are not listed here.
If the electronic CAN joystick is faulty, an error code is emitted. The message
containing the error code depends on the protocol used (see data sheet
29696). The description of the error codes is available on request.
14�1 Malfunction table
Possible cause
Operation
Mixing up the connection lines
when connecting the joystick to
the superior control system.
x Joystick was mechanically
damaged from the outside during
operation.
x Incorrect or faulty voltage
supply:
- Joystick supply voltage is
missing.
- Joystick supply voltage is too
low.
x Short circuit of the output
signals of the joystick by:
- Damage to the insulation in the
connected wiring harness.
x Humidity has entered the wiring
harness or the joystick.
The input resistances RPU and/
or RPD of the control unit are
either too large (high resistance)
or too small (low resistance).
x The ground line of the joystick
is not connected to the joystick
ground of the control unit.
There is a "potential shift" due
to different grounds between
joystick and higher-level control
x The joystick EMC environment
exceed the values stated in the
data sheet.
Troubleshooting | 4THE5
Remedy
Check the wiring and/or the wiring harness both at
the joystick connector and at the superior control.
Check the joystick for obvious damage. Replace the
product if needed.
Measure the supply voltage at the contacts of the
joystick and make sure that all contacts in the mating
connector are correctly fitted and latched.
Make sure that the mating connector is connected to
the joystick until latching.
Check the joystick and machine harness for obvious
damage. Replace the product if needed.
The seals of the wiring harness connector are
defective or the cable/joystick has been damaged.
Check whether the joystick is operated within its
"operating limits" and make sure that the input
resistances and the input capacitances of the
connected control unit are within the limits specified
in data sheet 29696.
Make sure that the ground of the joystick is
connected to the respective ground of the control
unit with a low resistance. Measure the connection.
Stop the machine.
RE 29696-01-B/2021-06-15, Bosch Rexroth AG
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