7. operating the flexipress - Grass

8. TROUBLE SHOOTING AND PROBLEM SOLVING
8-103 The Vertical Feed Speed Cannot be Adjusted
Possible causes:
- Non-return throttle valves, item 11 and/or 13 on pneumatic diagram, are defective.
- Reversing valve, item 12 on pneumatic diagram, is defective.
- Reversing valve, item 12 on pneumatic diagram, is not activated by the switching cam.
Whichever is the case, request the assistance of a pneumatics specialist or Grass service engineer.
8-104 The Vertical Drilling Head Motor Does Not Run
Pneumatic causes
- Is the insertion die arm raised to its uppermost position? (Pneumatic position monitoring)
- Remove pneumatic hose “V” from non-return throttle valve “11” on the switchgear cabinet, Fig. 4-002-06,
and check whether air is released at the pneumatic hose when the vertical drilling head start button is
pressed. If there is no air, this means there is a problem with the pneumatic control system.
Electrical causes
- Is the machine plugged in?
- Check the fuses on your factory distribution panel.
- Is the main switch turned on?
- Turn off the main switch, open the switchgear cabinet with the key and press the red buttons on the
thermal overcurrent relays, check automatic fuses or blowout fuse, close switchgear cabinet, turn the main
switch back on
- Electric motor defective
Mechanical causes
- Turn off the main switch. Check whether the gearbox can be turned manually by rotating one of the
spindles. This should turn the fan wheel in the electric motor. If not, the gearbox is mechanically damaged.
- If the above tips do not help, please call in
a pneumatics specialist (pneumatic diagrams, section 4-006), or
a licensed electrician (wiring diagrams, section 4-007)
The star in your cabinet
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