Tweco 175i Transtig - Manual (Page 68)

TRANSMIG 175i
POWER SOURCE PROBLEMS AND ROUTINE SERVICE REQUIREMENTS 5-2 Manual 0-5143
8 Gas flow continues after
the torch trigger switch has
been released (MIG mode).
Gas valve has jammed open
due to impurities in the gas
or the gas line.
Have an accredited CIGWELD
service provider repair or re-
place gas valve.
9 Power indicator 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%.
10 TIG electrode melts when
arc is struck.
TIG torch is connected to
the (+) VE terminal.
Connect the TIG torch to the (-)
VE terminal.
11 Arc flutters during TIG
welding.
Tungsten electrode is too
large for the welding cur-
rent.
Select the correct size of tung-
sten electrode. Refer to Table
4-7.
Table 5-1
5.02 Routine Service and Calibration Requirements
!
WARNING
There are extremely dangerous voltage and power levels present inside this Inverter Power Source.
Do not attempt to open or repair unless you are an accredited CIGWELD Service Provider. Discon-
nect the Welding Power Source from the Mains Supply Voltage before disassembling.
Routine Inspection, Testing & Maintenance
The inspection and testing of the power source and associated accessories shall be carried out in accordance
with Section 5 of AS 1674.2 - 2007: Safety in Welding and Allied Processes-Part 2 Electrical. This includes an
insulation resistance test and an earthing test to ensure the integrity of the unit is compliant with Cigweld's
original specifications.
If equipment is to be used in a hazardous location or environments with a high risk of electrocution as outlined
in AS 1674.2 - 2007, then the above tests should be carried out prior to entering this location.
A. Testing Schedule
1. For transportable equipment, at least once every 3 months; and
2. For fixed equipment, at least once every 12 months.
The owners of the equipment shall keep a suitable record of the periodic tests and a system of tagging,
including the date of the most recent inspection.
A transportable power source is deemed to be any equipment that is not permanently connected and fixed
in the position in which it is operated.