Troubleshooting Diagram - Kemppi WeldForce KPS 3500 Service Manual

Troubleshooting
The machine may only be repaired by a technician or a workshop licensed and authorized to
do the job!
First do a visual check to find any possible loose connectors, broken wires or signs of
overheating.

Troubleshooting diagram

PROBLEM
The power source will not start.
The signal lamps remain blank.
Net fuses blow immediately
when the power source is
switched on.
The power source doesn´t reach
maximum power.
The fans remain rotating after
power source startup.
POSSIBLE CAUSE
The net fuse has burnt. A faulty
supply cable.
A faulty auxiliary transformer
T002.
A faulty control card A001.
A faulty primary circuit
semiconductor.
The net fuses has blown. A faulty
supply cable. A faulty primary
rectifier VG101. A faulty secondary
diode card.
A faulty control card A001.
REMEDY
Check the net fuses. Check the 3
phases coming to power source´s
connector X1.
Check the auxiliary transformer´s
secondary voltages from control
card A001, between connectors
X12 - X11 and X12 - X10 (appr.
20 VAC).
Update the control card´s flash
memory program. If
reprogramming will not solve the
problem, replace the control card
A001.
Check the semiconductors on the
primary side.
Check the net fuses, supply cable
and the primary rectifier VG101.
Check the condition of the
secondary diode cards.
Reprogram the control card A001
flash-memory. If reprogramming
will not solve the problem, then
replace control card A001.
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