Bosch Rexroth 4WS2EM 10 Series Operating Instructions Manual page 42

42/48 Troubleshooting
Bosch Rexroth AG, 4WS2EM 10...XL..., RE29583-XL-B/09.20
14 Troubleshooting
14.1 How to proceed for troubleshooting
▶ Always work systematically and purposefully, even when under time pressure.
In the worst case, a random, thoughtless disassembly and change in settings
might result in the inability to identify the original cause of error.
▶ First, get an overview of the functions of the valve in conjunction with the overall
system.
▶ Try to find out whether the valve was functioning properly in conjunction with the
overall system before the error occurred.
▶ Try to determine any changes to the overall system in which the valve is
integrated:
– Have there been any changes to the application conditions or to the area of
application of the valve?
– Have any changes (e.g. refittings) been made or has any repair work been
carried out on the overall system (machine/system, electrical systems, control)
or on the valve? If so: what type of changes or work?
– Has the valve and/or the machine been used as intended?
– How did the fault become apparent?
▶ Try to get a clear idea of the cause of error. Ask the direct (machine) operator.