RE 30011-B, Edition 10.2021, Bosch Rexroth AG
Troubleshooting |
Pressure and flow control system SYDFE1 series 2X, 3X
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The individual faults are signaled on the printed-circuit board of the control
electronics (provided that the view to the indicator lamps is not obstructed).
Fig. 36: Fault signals on the printed-circuit board
1 Excessive permanent control error
2 Break of valve position transducer cable (secondary)
3 Break of valve position transducer cable (primary)
4 Break of swivel angle position transducer cable
5 Actual pressure value error
6 Actual valve value error (out of range)
7 Fault of internal voltage supply (unbalance)
8 Actual swivel angle value error (range exceeded)
9 Fault of internal voltage supply (undervoltage)
Neither the individual faults nor the collective fault are saved and they always
reflect the
momentary
state.
If a loose connection at a plug-in connector of the swivel angle transducer (IW9)
results in the temporary detection of a fault, this individual fault will trigger the
issue of a fault signal.
Depending on the configuration of jumper J1 the following will happen:
J1 ON
, i.e. shutdown of the valve output stage
In this case, the relevant fault results in the shutdown of the valve output stage,
that is, the activation of the pilot valve is interrupted.
This causes the position of the valve spool to leave the “permitted” range of the
actual valve value and thus results in signaling of the individual fault “v-actual”
(fault: actual valve value out of range).
A SYDFE1 system with internal supply will change over to zero stroke operation
(ca. 8...12 bar). The command values applied (pressure, swivel angle) will not be
Which error is present?
1
2
3
4 5
6
7
8
9
Example
