TROUBLE SHOOTING
19/05/05 76440-GB
I
GB
F
TS 400 PS
TS 500 PS
M
40
REV.0-05/05
P1
No welding current but auxiliary
output is OK
1) Position of remote control switch
2) Potentiometer defect in welding
current control
3) Welding current signal interrupter
4) Defect card
5) Defect in diode bridge
Problems
Possible cause
Solution
P2
There is welding but non penetra-
tion
1) Check that it is in OFF position if there is no remote control, on
"0" with remote control inserted.
2) Check the continuity of the welding potentiometer and relative
connections.
3) Check that cables from shunt to card are in perfect state.
4) Replace card.
5) Check the diode or the controlled diodes.
1) Connnection of base current control
are open
2) Defect in the base current contactor
1) Check that the a.c. 48V arrives to the contactor of the base current.
2) Check that the contacts and the contactor shut are in good
conditions.
P3
Defect in welding, high and discon-
tinued sparks
1) Defect in connections between
shunt and potentiometer
2) Defect in diode bridge
3) Defect in card
1) Check the continuity and the state of different connections which
go to the card from the shunt as well as from the potentiometer.
2) Check the diodes and controlled diodes.
3) Replace the card.
P4
No welding output and no auxiliary
power output
1) Check the wiring inside the welder for a short circuit between
cables or to ground.
2) If the wiring is OK, short circuit the condenser to be sure that it
is discharged, disconnect all wires from condenser and, using
an ohmmeter, check that the condenser is not short circuited.
3) If the condenser box is OK, disconnect all leads from the stator
except for those going to the condenser box and check the output
from the alternator.
If there is no output from the welding winding and the auxiliary
winding, replace the stator.
4) If there is output from all windings reconnect the diode bridge
and check if there is welding current. If not the diode bridge is
defective. If there is welding current connect the auxiliary power
leads one at a time until there is no output; at this point, the short
circuit is in that line.
1) Short circuit in wiring
2) Defective condenser
3) Defective stator
4) Short circuited diode bridge
WELDING
GENERETING
P1
Voltmeter shows no voltage or low
voltage but actual voltage at the
sockets is OK.
1) Voltmeter malfunction
1) Replace the voltmeter.
P2
No three-phase voltage present
at the socket(s) but voltmeter
reading is normal and there is
voltage on the other sockets.
1) Differential switch not inserted
2) Differential switch malfunction
1) Turn on the switch.
2) Replace the switch.
P3
No single
phase voltage one sok-
ket but voltmeter reading is normal
and there is voltage on the other
sockets.
1) Intervention of thermal switch due
to excessive current.
2) Thermal switch malfunction.
1) Push in the thermal switch.
2) Replace the thermal switch.
1) Disconnect all outputs on the generator except for those on the
condensers and re-start machine; check for voltage on conden-
sers.
1) Short circuit present on the genera-
tor outputs.
P4
No voltage present.