Service – Kemppi KM 400 MVU User Manual

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Err154 Overloading of the wire feed motor

The welding has been interrupted because the wire feeding engine power has risen to a high

level. The cause may be congestion in the wire line. Check the wire lead, contact tip, and feed

rollers.

Err201 Use of PMT gun is prevented

The machine is intended for use with MMT guns. When a PMT gun is used, the gun’s jumpers

must be set to ‘FU’. This error code may appear also if the contacts of the gun trigger are

stained or there are problems with the trigger leads. Check the trigger’s leads.

Other error codes:

The machine can show codes not listed here. In the event of an unlisted code appearing,

contact an authorised Kemppi service agent and report the error code shown.

SERVICE

The utilisation level of the power source and its working environment should be taken into

consideration in planning the frequency of maintenance of the machine. Appropriate use and

preventive maintenance guarantee the trouble-freest use of the equipment. This allows you to

avoid interruptions in use and increases the productivity of the machine.

5.1

CABLES

Check the condition of welding and mains cables daily. Do not use damaged cables. Also

make sure that all extension cables used in the mains connection are in proper condition and

compliant with regulations.

NOTE!

The mains cables may be repaired and installed only by electrical contractors and installers

authorised to perform such operations.

5.2

POWER SOURCE

Before cleaning the interior of the machine, you need to remove the case by unscrewing the

mounting screws at the top and sides of the machine.

NOTE!

To prevent damage, wait approximately two minutes after disconnecting the mains cable

before removing the machine’s case.
Perform the following cleaning and maintenance at least every six months:

Clean the interior of the machine and the fan grill’s net of any dust and stains – for

example, with a soft brush and vacuum cleaner.

• Do not use pressurised air. The stain may become compressed into the grooves of the

coolers.

• Do not use a pressure-washing device.

Check the electrical connections of the machine. Clean any oxidised connections, and

tighten the loosened ones.

• Check for the right tension before you start repairing the connections.

NOTE!

Remember that the machine may be repaired only by an electrical contractor or installer

authorised to perform such operations.

5.3

REGULAR MAINTENANCE

Authorised Kemppi service agents perform regular maintenance by agreement.
Tasks included in regular maintenance:

• Cleaning of equipment.

• Inspection and maintenance of the welding gun.

• Checking of connectors, switches, and control knobs.

• Checking of electrical connections.

• Checking of the mains cable and plug.

• Replacement of damaged or worn parts.

• Calibration testing, with adjustment of the functions and operational values of the

machine, if necessary.

FastM

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