Tweco Fabricator 141i Operating Manual - Manual (Page 87)

Fabricator 141i
Manual 0-5145 5-1 TROUBLE SHOOTING AND SERVICE
SECTION 5:
POWER SOURCE PROBLEMS AND ROUTINE SERVICE
REQUIREMENTS
5.01 Power Source Problems
FAULT CAUSE REMEDY
1 Primary Power Supply is
ON, power indicator is illu-
minated however the Power
Source will not commence
welding when the torch trig-
ger switch is depressed.
A Power Source is not in the correct
mode of operation.
A Set the Power Source to the correct
mode of operation with the process
selection switch.
B Welding leads, or polarity cable
not connected.
B Connect welding leads or polarity
cable.
C Faulty torch trigger. C Repair or replace torch trigger
switch/lead.
2 Fault Indicator is illuminat-
ed and the Power Source
will not commence weld-
ing when the torch trigger
switch is depressed.
Duty cycle of Power Source has
been exceeded.
Leave the Power Source switched
ON and allow it to cool. Note that
fault indicator must be extinguished
prior to commencement of welding.
3 The Power Source will not
feed wire in MIG mode.
A Electrode wire stuck in conduit
liner or contact tip (burn-back
jam).
A Check for clogged / kinked MIG Gun
conduit liner, loose nozzle or worn
contact tip. Replace faulty compo-
nents.
B 8 pin gun connector not con-
nected.
B Connect 8 pin gun connector.
C MIG GUN/SPOOL GUN switch is
switched to SPOOL GUN.
C Switch the MIG GUN/SPOOL GUN
switch to MIG GUN.
D Faulty torch trigger. D Repair or replace torch trigger.
E Wire tension too loose. E Tighten wire tension.
F Brake tension too tight. F Loosen brake tension.
4 Welding wire continues to
feed when torch trigger is
released.
A Trigger mode selection switch is in
4T latch mode.
A Change the trigger mode selection
switch from 4T latch mode to 2T
normal mode.
B Torch trigger leads shorted. B Repair or replace torch trigger
switch/lead.
5 Welding arc cannot be
established in MIG mode.
A MIG Gun polarity lead is not
connected into a welding output
terminal.
A Connect the MIG Gun polarity lead
to either the positive welding output
terminal or the negative welding
output terminal as required.
B Poor or no work lead contact. B Clean work clamp area and ensure
good electrical contact.