Thomas NOMARK 65/99 - Page 50

Indicators Situation Cause Remedy
2. Main switch does not
light up although it is
switched on
• NOMARK not connected
Fault in:
• Main switch or lamp
• Power cable
• Mains power plug
• Mains fuse
• Connect NOMARK and switch
on!
Check*) and replace if
necessary*):
• Main switch or lamp
• Power cable with plug
• Mains fuse (in switch box)
3. Main switch lights up,
Display does not light up
Fuse defective Replace fuse in NOMARK
65/99*)
(see chapter 5.5)
4. Main switch lights up,
Display does not light up
Fuse defective Replace fuse*)
(see chapter 5.5)
5. G1 is connected,
but LED "magnet"
does not light up
Control cable damaged
(e.g. loose contact); hoisting
magnet in gun defective
Connect another gun and check
whether the LED then lights up;
replace cable or hoisting magnet
if
necessary*)
6. No G1 connected,
but LED "magnet"
still lights up
Fault in power unit Shut down NOMARK and mark
as
defective so that it is not switched
on again; notify TWS
after sales service
7. LED "blocked"
lights up
• Malfunction
• Fault in power unit
• Switch NOMARK off and then
on
again. If LED does not light up
again, continue working.
• Shut down NOMARK and mark
as
defective so that it is not switched
on again; notify TWS
after sales service
9. Ready LED does not
light up
Fuse defective Replace fuse*)
(see chapter 5.5)
10. Contact LED does
not light up on contact
with the workpiece
• No earth or welding cable
connected
• One of the cables is
defective
• NOMARK 65/99 defective
• Connect earth, control and
welding cables to NOMARK
• Replace cable if necessary
• Notify TWS aftersales
service
11. Start LED does not
light up although the
start button is being
pressed
• Control cable not
connected to NOMARK 65/99
• Control cable defective
• gun defective
• NOMARK 65/99 defective
• Connect and fix cable
• Replace cable if necessary
• Connect another gun and test
LED again
• Notify TWS after sales
service
12. Start LED lights up
although the start
button is not being
pressed
• Short circuit in control
cable
• Start button defective
• Replace control cable or
start button if necessary (see
chapter 5.8 or chapter 5.9)
*) Check only by electricians!
Tab: 5 - 1 Troubleshooting using LED indicators
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