JESS WELDING inoMIG 350, Operating Instructions Manual

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inoMIG 350/400/500 17 Troubleshooting
BA-0014 • 2020-06-05
EN - 33
Tab. 9 Troubleshooting
Fault Cause Troubleshooting
Display shows T°C - 01/02/03 - hot Machine is overheating Allow the machine to cool down with the
fan running
Thermal sensor cable interrupted Find and eliminate the interruption
Incorrect machine type set in the control
box Contact the service partner
Display shows T°C - int - e.g. +56 Ambient temperature is below −10°C or
above +50°C Restore the machine to the normal
temperature range
Thermal sensor in the control box is
defective Replace the control box, have the sensor
repaired
Display shows Err H2o --- (continuously)
(To delete, switch the machine off and back
on again) Water tank is empty Refill with water and methylated spirit in the
ratio 4:1
Water flow is below 0.5 l/min Check the water flow (torch/lines)
Flow meter is defective Replace flow meter
Main switch ON, 1 or 2 green control
lamps on the front panel do not light up
(see 6 Functional description on
page EN
- 11)
One or more supply phases have stopped
working Check the mains supply cable and fuse
Fuse in front panel is defective Replace 2 AT fuse
Main switch ON, green control lamps are
lit, MC control box not functioning Fuse for the secondary control transformer
is faulty Replace 6.3 AT fuse
Fuse in the MC control box is defective Remove and open the control box, replace
6.3 AT fuse
Cable in the intermediate cable assembly is
defective Check the 5-pole cable in the intermediate
cable assembly
No function when pressing the torch trigger Torch trigger is defective Repair the torch trigger
Torch control line interrupted Check the torch control line
MC control box is defective Replace the control box, have the control
box checked
Wire feeder motor is not running MC control box is defective Replace the control box, have the control
box checked
Wire feed motor is defective Replace the wire feed motor, check the
contact pins (carbons)
Cable connection between the control box
and motor interrupted Check the cable connection
The wire between the wire feed roller and
the wire guide tube buckles Contact pressure of the wire feed rollers is
too high See 11.1 on page EN - 27
The distance between the wire feed roller
and the guide tube is too great Check the distance/re-adjust the wire
guide tube
Irregular wire feed Poor uncoiling of the wire from the wire
spool Check/re-insert the wire coil
Wire-holding arbor does not run smoothly Check the wire-holding arbor
Incorrect wire feed roller
See 11.1 on page EN - 27
Wire guide tube or wire guide spiral is
soiled/defective See 11.1 on page EN - 27
Contact tip blocked/defective Clean/replace the contact tip
Welding wire dirty/starting to rust Replace the welding wire
Wire guide tube is not aligned with the
groove of the wire feed roller See 11.1 on page EN - 27