34
Troubleshooting
Troubleshooting
table
Error
Cause
Remedy
No welding current
Mains switch is ON,
operational readiness
indicator not lit up
Break in mains lead
Check mains lead and mains
voltage
Mains switch is faulty
Replace the mains switch (see
the section headed “Installa-
tion instructions for rear of
housing, mains switch and
mains cable”)
No welding current
Mains switch is ON,
operational readiness
indicator is lit up
Break in welding cable connec-
tion
Faulty or broken earth connec-
tion
Check plug-in connections
Earth workpiece
No welding current
Mains switch is ON,
operational readiness
indicator is lit up
No welding current
Mains switch is ON,
operational readiness
indicator lights up,
malfunction indicator flashes
Maximum duty cycle exceeded
- machine overloaded
Observe duty cycle
Thermostatic cut-out system
has tripped - fan is running;
temperature sensor is faulty
Wait until cooling down period
is over; machine will switch on
automatically - if not: machine
should be serviced
Insufficient cooling air reac-
hing machine
Ensure sufficient supply of
cooling air
Dust filter is dirty
Remove the filter attachment
and clean or change filter insert
Power module is very dirty (e.g.
O p e r a t i o n w i t h o u t f i l t e r
atachmnet)
Remove cover of power source
and blow inside of machine
clean with dry, oil-free, reduc-
ed-blow compressed air (see
“Care and Maintenance”)
No welding current
Mains switch is ON,
operational readiness
indicator lights up,
malfunction indicator flashes
Fault in power section
Switch power source off, wait
10 seconds, and switch back
on again. If fault recurs despite
several tries - check power
source
Also:
visible damage to the
transformer (transformer
cables are charred)
Transformer is faulty
Exchange the transformer (see
“Installation instructions for
transformer”)
LCA 15 malfunction / is faulty Switch power source off, wait
10 seconds, and switch back
on again. If fault recurs despite
several tries - replace LCA 15
board (see the section “Install-
ation instructions for LCA 15
board“)
Safety
Warning!
An electric shock can be fatal. Before opening up the power source,
switch it off, unplug it from the mains and put up a warning sign to stop
anybody inadvertently switching it back on again. If necessary, discharge the
electrolytic capacitors.
Содержание TP 1500
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