Tweco ArcMaster 401MST - Manual (Page 76)

ARCMASTER 401MST POWER SOURCE
POWER SOURCE PROBLEMS AND ROUTINE SERVICE REQUIREMENTS 5-4 Manual 0-5287
5.04 Routine Inspection, Testing & Maintenance
The inspection and testing of the power source and associated accessories shall be carried out by a licensed elec-
trician. 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 Tweco original specifications.
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, includ-
ing 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.
B. General Maintenance Checks
Welding equipment should be regularly checked by an accredited Tweco Service Provider to ensure that:
1. Flexible cord is of the multi-core tough rubber or plastic sheathed type of adequate rating, correctly
connected and in good condition.
2. Welding terminals are in suitable condition and are shrouded to prevent inadvertent contact or short
circuit.
3. The Welding System is clean internally, especially from metal filing, slag, and loose material.
C. Accessories
Accessory equipment, including output leads, electrode holders, torches, wire feeders and the like shall be
inspected at least monthly by a competent person to ensure that the equipment is in a safe and serviceable
condition. All unsafe accessories shall not be used.
D. Repairs
If any parts are damaged for any reason, it is recommended that replacement be performed by an accredited
Tweco Service Provider.
5.05 Cleaning the Welding Power Source
!
WARNING
There are dangerous voltage and power levels present inside this product. Do not attempt to open or
repair unless you are a qualified electrical tradesperson. Disconnect the Welding Power Source from
the Mains Supply Voltage before disassembling.
To clean the Welding Power Source, open the enclosure and use a vacuum cleaner to remove any accumulated
dirt, metal filings, slag and loose material. Keep the surfaces clean.