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Messer Cutting & Welding K4 Operations Instructions Page 61

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8 Operating problems, causes and remedies
8/1
8.1 Customer checklist
All machines are subjected to strict manufacturing and final inspection procedures. If, despite this,
anything fails to work at any time, please check the machine using the following chart. If none of the
fault elimination procedures described results in the correct functioning of the machine, please
contact your authorised dealer.
Fault Possible cause Remedy
The wire
electrode is not
advanced
1.
2.
3.
4.
5.
6.
Splatter has blocked the
opening of the contact nozzle
The wire feed roller slips
The motor of the wire feed
drive does not turn
A kink in the wire prevents
passage through the contact
nozzle
Wire drum brake is set too tight
Torch defective
Clean the contact nozzle, spray with
separating agent
Check the counter pressure roller. Feed
roller worn, replace. Wire jams. Check
how it unwinds.
Check fuse F1 on
WK 5 (see spares list)
Unfasten the contact nozzle and snip off
deformed wire
Ease brake setting
Replace
Wire is looped 1.
2.
Core or nozzle blocked
Excessive curvature of the
tube package
Renew or clean
Ensure that the tube package is
extended as fully as possible
The wire-electrod
e
feed advances
irregularly
1.
2.
3.
Blocked or damaged wire feed
coil
Wire drum brake is set too tight
Bore of the contact nozzle is
too small
Clean or replace
Loosen the wire drum brake
Use the correct contact nozzle
The unit does not
switch on
1.
2.
No mains voltages
Fault in the power source
Check the mains fuses and replace as
necessary
Eliminate the fault
No welding
current:
1.
2.
Insufficient contact of the
workpiece lead
Excess temperature
Check contact and installation
Allow equipment to cool down
Water deficiency
1.
2.
3.
Too little water
Leak in water circuit
Coolant pump inoperative
Replenish coolant supply
Repair leak and replenish water
Depress the excess temperature release
Pump is stuck
1.
2.
Extended standstill times
Dirt
1. Press in overcurrent release
2. Use screwdriver to release the pump
impeller through the service opening in
the front panel.
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