Troubleshooting; How To Proceed For Troubleshooting; Error Messages - Bosch Rexroth VT-VPCD Series Operating Instructions Manual

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14 Troubleshooting

14.1 How to proceed for troubleshooting

Always act systematically and targeted, even under pressure of time. Random and
imprudent disassembly and readjustment of settings might result in the inability to
ascertain the original cause of fault.
First obtain a general overview of how your product works in conjunction with the
entire system.
Try to clarify whether the product worked properly in conjunction with the entire
system before the troubles occurred.
Try to determine any changes of the entire system in which the product is
integrated:
– Were there any changes to the product's operating conditions or operating range?
– Were any changes made or repairs carried out on the complete system (machine/
system, electrics, control) or on the product? If yes, which?
– Was the product or machine used as intended?
– How did the malfunction manifest itself?
– Try to get a clear idea of the error cause. Directly ask the (machine) operator.
If you cannot rectify the error, contact one of the contact addresses which can be
found at: www.boschrexroth.com/adressen or in the address directory in the
Annex.

14.2 Error messages

Table 12: Description of error messages
Error message Description
±10 V reference Reference voltage +10 V (b32) or reference voltage -10 V (b30) outside the
permitted range.
Power 24
Supply voltage UB (z30) less than UB min.
DO1~DO7 short- Short-circuit of one or several of the 8 discrete outputs.
circuit
Checksum Flash Checksum error in the program or data memory (flash)
RAM Fault Error in RAM
Version error Versions of the individual program parts are not compatible (can occur only
after a firmware update was executed).
Angle CMD The level at analog input "swivel angle command value" b14/16 (AI4) is
outside the valid signal range.
Res. Angle CMD The level at analog input "swivel angle command value" b2/ (AI3) is outside
the valid signal range.
Pressure CMD The level at analog input "pressure command value" b10/12 (AI1) is outside
the valid signal range.
Power CMD The level at analog input "power command value" b18/20 (AI5) is outside
the valid signal range.
Pressure Side A The level at analog input "actual pressure A" b6/8 (AI2) is outside the valid
signal range.
Pressure side B The level at analog input "actual pressure B" b22/24 (AI6) is outside the
valid signal range.
LVDT1 Fault 1 Cable break in the secondary branch of the valve position transducer (z14,
z16)
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Troubleshooting
RE 30028-B/09.13, VT-VPCD, Bosch Rexroth AG
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