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112/128 Troubleshooting
Control questions
Bosch Rexroth AG, CytroBox, RE 51057-B/11.19
15 Troubleshooting
Deactivated safeguards!
Danger to life! Risk of injury!
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Make sure that all safeguards, e.g. fuses, protective grounding conductor,
pressure relief valves are active.
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Proceed with extreme caution if safeguards need to be deactivated for
troubleshooting.
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If possible, operate the machine/system with reduced performance data in
set-up mode for identification of errors.
Successful troubleshooting within the hydraulic power unit requires precise
knowledge on the set-up and the mode of operation of individual components.
The combination of hydraulics with an electrical system and electronics makes
troubleshooting very complex.
Circuit diagrams (hydraulic and electric), parts lists, functional diagrams as
applicable and other documentation must be available for effective troubleshooting.
15.1 How to proceed for troubleshooting
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Always work systematically and purposefully, even when under time pressure.
Random and imprudent disassembly and readjustment of settings can, in the
worst-case scenario, result in the inability to determine the original cause of error.
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First, get a general idea of the function of the hydraulic power unit in combination
with the overall machinery/system.
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Try to find out whether the hydraulic power unit has worked properly in
combination with the overall machinery/system before the error occurred first.
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Try to determine any changes of the overall machinery/system, in which the
hydraulic power unit is integrated:
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Were there any changes to the application conditions or area of application of the
hydraulic power unit?
• Have modifications (e.g. refittings) or repair works been carried out on the overall
system (machine/system, electrical system, control) or on the hydraulic power unit?
• If yes: What were they?
• Was the hydraulic power unit or the machine/system used as intended?
• How did the fault become apparent?
• Try to get a clear idea of the cause of error.
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Ask the direct (machine) operator, if necessary.
WARNING
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