5.1 Troubleshooting
In the event of a malfunction proceed as follows:
1. Switch off the power unit.
2. Unscrew the control, earth and welding cables from the
power unit.
3. Switch on the power unit.
4. If in addition to the main switch, the mains power LED, the
capacitors charge status LED and the display any other LED
then also lights up, switch off the power unit again and contact
TWS.
Warning: In the event of a system malfunction the power unit
must be switched off, disconnected from the mains and
secured
to that it cannot be switched on again.
If no other LED lights up, you can take the following
remedial measures:
Warning:
Faults in the power unit NOMARK 65/99 requiring the housing
to be opened may only be repaired by authorised electricians!
Faults in the welding gun requiring only replacement of
mechanical replacement parts can be repaired by skilled
personnel with the aid of the exploded view (chapter 5.8 and
chapter 5.9).
After repair a function test of the protective circuits must be
carried out by an electrician.
Only replacement parts specified in the corresponding part lists
may be used to replace parts!
Malfunctions that cannot be repaired by the remedial measures
listed below may only be repaired by TWS or authorised repair
technicians.
1. First carry out the start check (page 13).
If the test results is negative, continue with the relevant point in
table 5 - 1.
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