Kemppi WELDFORCE KPS 3500, Руководство по обслуживанию, Страница: 10 / 18

Troubleshooting
PROBLEM POSSIBLE CAUSE REMEDY
The power source will not start.
The signal lamps remain blank. The net fuse has burnt. A faulty
supply cable.
A faulty auxiliary transformer
T002.
A faulty control card A001.
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.
Net fuses blow immediately
when the power source is
switched on. A faulty primary circuit
semiconductor. Check the semiconductors on the
primary side.
The power source doesn´t reach
maximum power. The net fuses has blown. A faulty
supply cable. A faulty primary
rectifier VG101. A faulty secondary
diode card. Check the net fuses, supply cable
and the primary rectifier VG101.
Check the condition of the
secondary diode cards.
The fans remain rotating after
power source startup. A faulty control card A001. Reprogram the control card A001
flash-memory. If reprogramming
will not solve the problem, then
replace control card A001.
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
10