RE 30017-B, Edition 11.2021, Bosch Rexroth AG
Commissioning |
SYDFED-2X, SYDFED-3X, SYHDFED-1X
65/96
3.
Before activating the motor, feed forward small command values (e.g. p = 15
bar, SWA = 10 %).
In this state the VT-DFPD pilot valve signals an error (excessive control error).
When the electronics works properly, the error message disappears when the
motor is switched on (control error now equal to zero).
▶ Switch on the drive motor of the pump!
8.1.7 Bleeding the pre-load valve
WARNING
Case interior under high pressure!
Risk of injury! Loosening the screw too far can cause parts and jets of hydraulic
fluid to be ejected.
▶ Do not turn the bleed screw out too far (max. 2 turns)!
If a pump unit is operated with a pre-load valve, this valve has to be air-bled
for the initial start-up, provided that the pump does not deliver and aspire oil.
Bleeding is not required, when the pump displaces oil. Bleed the pump while the
system is running at low operating pressure. To this end, loosen the screw (see
Figure below) by a maximum of 2 turns and wait until bubble-free oil flows out.
Then, re-tighten the screw.
Bleed screw
Fig. 27: Bleeding the pre-load valve
8.1.8 Setting controller parameters
The following description is to simplify setting of the controller parameters.
Depending on the application, not all of the parameters listed here must be
modified.
