Tweco 181i Fabricator User Manual download pdf (Page 83)

Fabricator 181i

Manual 0-5191 5-1 TROUBLE SHOOTING AND SERVICE

SECTION 5: POWER SOURCE PROBLEMS AND

ROUTINE SERVICE REQUIREMENTS

5.01 Power Source Problems

FAULT CAUSE REMEDY

1 Electricity Supply is ON,

power indicator is illumi-

nated however the Power

Source will not commence

welding when the torch trig-

ger switch is depressed.

A Power Source is not in the cor-

rect mode of operation.

A Set the Power Source to the correct

mode of operation with the process

selection switch.

B Faulty torch trigger. B 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 or worn contact tip.

Replace faulty components.

B MIG GUN/SPOOL GUN switch

is switched to SPOOL GUN.

B Switch the MIG GUN/SPOOL GUN

switch to MIG GUN.

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 out-

put 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.

6 Inconsistent wire feed. A Worn or dirty contact tip. A Replace if necessary.

B Worn feed roll. B Replace.

C Excessive brake tension on wire

reel hub.

C Reduce brake tension on spool hub

D Worn, kinked or dirty conduit

liner

D Clean or replace conduit liner

7 No gas ﬂow in MIG mode. A Gas hose is damaged. A Replace or repair.

B Gas passage contains impuri-

ties.

B Disconnect gas hose from the rear

of Power Source and blow out

impurities.

C Gas regulator turned OFF. C Turn ON regulator.

D Empty gas cylinder. D Replace gas cylinder.

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Tweco 181i Fabricator User Manual Page 83

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