Operation Disturbances; Operation Of The Overload Protection; Control Fuses; Under- And Overvoltages In The Mains Supply - Kemppi WeldForce KPS 3500 MVU Operation Instructions Manual

– Damaged parts or parts in bad connection are replaced by new ones
– Maintenance testing. Operation and performance values of the machine are checked, and
adjusted when necessary by means of test equipment.

6. OPERATION dISTuRbANCES

In case of problems contact the Kemppi works in Lahti, Finland, or your local Kemppi dealer.
Check the maintenance objects before the machine is sent to the Service Workshop.

6.1. OPERATION OF ThE OVERLOAd PROTECTION

Yellow pilot lamp H12 of thermal protection is lit when thermostat has operated due to overheating
of machine.
The thermostat of machine will operate, if machine is continuously loaded over rated values or
cooing air circulation is blocked.
Cooling fan cools down the machine and when the pilot lamp is not lit the machine is automatically
ready for welding.

6.2. CONTROL FuSES

Fuse F11, 6,3 A delayed, on the rear wall of machine is as protection for connection of auxiliary
devices X14-15.
Use same type and rating of fuse which is marked beside the fuse adapter. Damage
caused by a wrong type fuse is not covered by the guarantee.

6.3. uNdER- ANd OVERVOLTAGES IN ThE mAINS SuPPLy

Primary circuits of machine are protected against sudden, transient overvoltages.
Machine is designed to withstand 3 x 440 V voltage continuously (see technical data). See to
it that voltage is kept within admissible limits especially when mains supply is taken e.g. from
combustion engine generator.
If the mains has undervoltage (under approx. 300 V), machine control stops to operate
automatically.

6.4. LOSS OF A PhASE IN ThE mAINS SuPPLy

Loss of a phase causes noticeable poorer welding properties than normally or the machine doesn't
get started at all. Loss of a phase can be due to following:
– blowing of mains supply fuse
– defective mains cable
– bad connection of mains connection cable on terminal block or plug of machine
© Kemppi oy Kemppi WeldForce KpS3500, KpS4500, KpS5500, KpS3500mVU, KpS4500mVU, 5500KpSmVU / 0606 –