7. operating the multipress - Grass

8. TROUBLE-SHOOTING AND CORRECTIVE ACTION8-103 The vertical feed speed cannot be adjustedPossible problems:- The non-return throttle valve (items 11 and / or 13 on the pneumatic wiring diagram) is defective.- The reversing valve (item 12 on the pneumatic wiring diagram) is defective.- The reversing valve (item 12 on the pneumatic wiring diagram) is not activated by the switch cam.In each of the above cases, a pneumatic technician or a Grass Service Center is to be contacted.8-104 The vertical bore head motor does not runPneumatic problems:- Is the insertion die arm swung up to the upper position? Check pneumatic position.- Remove the pneumatic hose “V” from the non-return throttle valve “11” on the switchgear cabinet(illustration 4-002-06) and check if the activated vertical bore head start button releases air to thepneumatic hose. If there is no air, then the problem lies with the pneumatic control.Electrical problems:- Is the machine plugged in?- Check the safety fuses in your factory electrical distribution panel. Replace fuse if necessary.- Is the main switch turned on?- Turn off the machine with the main switch. Open the switchgear cabinet with the corresponding key andpress the red button of the thermal excess current release. Check the automatic safety switch. Close theswitchgear cabinet.- Turn on the main switch.Mechanical problems:- Turn off the main switch. Check one of the threaded spindles on the drill gearbox to see if it canbe turned manually. This should turn the fan wheel in the electric motor. If not, the gearbox is mechanicallydamaged.- If the above tips do not help, please call in a pneumatic technician (see diagram, section 4-006) or alicensed electrician (see wiring diagram, section 4-007).The star in your cabinet93