Kemppi KMS 400 AS, Operating Manual

EN

Mig/Mag welding

FastMig KMS AS is designed for MIG/MAG welding with either the Kemppi ArcFeed voltage 

sensing wire feed unit, or FastMig series MSF and MXF wire feeding units. When using MSF or 

MXF wire feed units, connect the unit as described in picture on page 7, and select the KMS 

function from the control panel. For further information see MSF or MXF manuals.
When you use the ArcFeed voltage sensing wire feed unit, you must select either CC or CV 

(Constant Current or Constant Voltage) mode from the KMS AS control panel. Ensure that 

the ArcFeed control panel has been set to correspond with the power source control panel. 

For example if power source is set to CC mode, the ArcFeed should also be set to CC mode. 

FastMig KMS AS has two welding programs for ArcFeed welding: one for self shielding filler 

wires and the other for standard cored and solid fillers wires. The welding program can be 

changed in SETUP function.
It is possible to connect MSF or MXF and ArcFeed feeders to FastMig KMS AS power source 

simultaneously. For example, this can be an efficient combination when using Kemppi 

WiseRoot process for root pass welding and then completing hot pass and filler runs with 

ArcFeed system using self-shielded filler wire.

MMa welding

FastMig KMS AS is also suitable for MMA welding with basic or rutile electrodes. MMA welding 

works with CC (Constant current) mode set from the KMS AS power source panel. NOTE: In 

CC mode FastMig KMS AS has two welding programs: one for ArcFeed CC welding and the 

other for MMA welding. The desired welding program can be chosen from the KMS AS ‘SETUP’ 

function.

setup FunCtiOns

3.8 

With a long press of button you can move to the Setup menu

Start Power

StA

-9 ... +9

0

Strenght of start pulse

Device address

Add

3 or 6

6

System bus address. Each device in same system 
must have different address.

Welding program CC

Pro

Stl, FEE

StI is for MMA welding FEE is for ArcFeed

Welding program CV

Pro

Std, InS

InS is for innershield wires Std for other wires

Restore factory settings

FAC

OFF, PAn, ALL OFF

Restores factory settings, when PAn or ALL is 
selected

OperatiOn COntrOl switChes and pOtentiOMeters

4. 

Main switCh i/O

4.1 

When you turn the switch into I-position, pilot lamp H11 on the front face is illuminated and 

the machine is ready for use.

NOTE!  

Always turn the machine on and off with the mains switch, never use the mains plugs as a 

switch.

pilOt laMps

4.2 

The pilot lamps of the machine report the electric operation:
The green pilot lamp H11 when lit indicates that the machine is on and ready for use and it is 

connected to the mains supply with the main switch in the I-position.
H12 indicates when lit that the thermal protection of the machine has been activated due to 

over heating. The cooling fan will continue to run and cool the machine down and when the 

lamp is off the machine is ready to weld.

10

FastM

ig KMS 400 AS / © Kemppi O

y / 1021