ROTHENBERGER ROWELD D 4/15 Aero Basic - Manual (Page 29)

ENGLISH 27
Prior to prolonged work interruptions (approx. 15-30 minutes), set the temperature controller (1)
back by about 2 positions (risk of melt overheating in the melt chamber). Set temperature con-
troller to welding position approx. 5 minutes before restarting the machine.
6 Maintenance/Inspection
Pull mains connector before carrying out any maintenance and repair work on the
hand extruder.
Maintenance and repair work on electrical tools may only be carried out by qualified electricians.
The hand extruder together with the hot air hood must have cooled down to safe-to-
touch temperature.
Observe the instructions under section “Safety“.
Maintenance and repair work may only be carried out by qualified personnel or by our service
staff.
To ensure the proper function of the hand extruder over its entire service life for its intended ser-
vice, we recommend:
– to have all maintenance, inspection and mounting work carried out by authorized and quali-
fied personnel who are familiar with the operating instructions,
– to always shut off the unit before carrying out any work on it,
– to remount and reactivate all safety and protective devices immediately after completion of
the maintenance/repair work.
During maintenance and repair work, make sure that the hand extruder and its individual com-
ponents are firmly positioned.
In addition to the operating instructions and the national and local accident prevention regula-
tions applicable at the place of use, the acknowledged technical rules for safe and proper work-
ing practices must be observed.
Any working practices posing a safety risk are prohibited.
Activities other than those described in this section may only be performed at the
Manufacturer’s workshops!
• After approx. 500 operating hours, the hand extruder including drive unit must be
thoroughly cleaned and inspected. This work may only be carried out at the manufacturer’s
workshops.
• Cables, switches, plug-in connections must be inspected by qualified staff every
three months (requirement according to VBG4); the inspection results must be documented.
7 Trouble-shooting
The following table lists potential operating upsets of the hand extruder, possible causes and
their remedies (fault diagnosis chart).
Should malfunctions occur which are not covered here or which cannot be traced back to the
cause stated, please contact ROTHENBERGER Werkzeuge GmbH.
Malfunction Fault No.
Drive motor does not start 5, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 23
Drive motor switches off 5, 8, 9, 14, 15, 16, 17, 18, 19, 23
No welding rod feed 1, 16, 17, 20
No extrudate conveyed out of welding shoe 1, 16
Extrudate output decreases during operation 1, 14, 16
No air supply 13
Integrated air supply without function 5, 22
No hot air 2, 3, 5, 18, 22