Tweco 130i Transarc Operating Manual - Manual (Page 55)

TRANSARC 130i
Manual 0-5283 5-1 POWER SOURCE PROBLEMS AND ROUTINE SERVICE REQUIREMENTS
SECTION 5:
POWER SOURCE PROBLEMS AND ROUTINE SERVICE
REQUIREMENTS
5.01 Power Source Problems
FAULT CAUSE REMEDY
1 Mains supply voltage
is ON, Amps Display is
illuminated however unit
will not commence weld-
ing when the torch trigger
switch is depressed.
A Power source is not in the cor-
rect mode of operation.
A Set the power source to the cor-
rect mode of operation with the
process selection switch.
B Faulty torch trigger. B Repair or replace torch trigger
switch/lead.
2 Fault Indicator is illumi-
nated and unit will not
commence welding 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 extin-
guished prior to commencement
of welding.
3 Welding arc cannot be
established.
A Poor or no work lead contact. A Clean work clamp area and en-
sure good electrical contact.
B Trigger switch faulty or discon-
nected.
B Connect or repair trigger switch.
4 No gas flow in TIG 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 or wirefeed-
er and blow out impurities.
C Gas regulator turned off. C Turn on regulator.
D Empty gas cylinder. D Replace gas cylinder.
5 Gas flow continues after
the torch trigger switch
has been released (TIG
mode).
A Gas valve has jammed open
due to impurities in the gas or
the gas line.
A Have an accredited CIGWELD
service provider repair or replace
gas valve.
B Post flow is active in TIG
modes.
B Reduce post flow time
6 Amps Display will not
illuminate and welding arc
cannot be established.
The mains supply voltage has
exceeded voltage limits of the
power source.
Ensure that the mains supply
voltage is within 240VAC ± 15%.
7 TIG electrode melts when
arc is struck.
TIG torch is connected to the
(+) VE terminal.
Connect the TIG torch to the (-)
VE terminal.
8 Arc flutters during TIG
welding.
Tungsten electrode is too large
for the welding current.
Select the correct size of tungsten
electrode. Refer to Table 4-3.
9 Fault light is on, and E-1
is shown on the Amps
display.
A Fail to Safe protection has oper-
ated in STICK mode- VRD fault.
A Reset mains power, if fault does
not clear then replace control
board.
B Fail to safe protection has
operated in TIG mode- Inverter
fault.
B Reset mains power, if fault does
not clear then replace control
board.
C External voltage has been ap-
plied to the welding circuit.
C Reset mains power and remove
the source of the external voltage.