Tweco 170 HF Weldskill - Manual (Page 37)

WELDSKILL 170 HF INVERTER
5-1 April 23, 2008
SECTION 5:
SERVICE
5.01 Routine Maintenance &
Inspection
CAUTION
Do not use compressed air to clean the
Welding Power Source. Compressed air
can force metal particles to lodge between
live electrical parts and earthed metal parts
within the Welding Power Source. This
may result in arcing between this parts and
their eventual failure.
5.03 Face Shield Maintenance
Parts that are broken, missing, plainly worn, distorted
or contaminated, should be replaced immediately.
Should such repairs or replacements become
necessary, it is recommended that such repairs be
carried out by appropriately qualified persons
approved by CIGWELD. Advice in this regard can be
obtained by contacting an accredited CIGWELD
Distributor.
NOTES
• Inspect lenses frequently. Immediately
replace any scratched, cracked, or pitted
lenses as they may impair visibility and
reduce protection.
• Inspect Faceshield Shell frequently.
Immediately replace any damaged or worn
components.
• The Faceshield and Lens should be
cleaned after use with a soft cloth.
5.04 Basic Troubleshooting
!
WARNING
There are extremely dangerous voltage
and power levels present inside this
product. Do not attempt to open or repair
unless you are a qualified electrical
tradesperson and you have had training
in power measurements and
troubleshooting techniques.
If major complex subassemblies are faulty, then the
Welding Power Source must be returned to an
Accredited CIGWELD Service Agent for repair.
The basic level of troubleshooting is that which can
be performed without special equipment or
knowledge.
!
WARNING
There are extremely 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.
Welding equipment should be regularly checked by a
qualified electrical tradesperson to ensure that:
• The main earth wire of the electrical installation
is intact.
• Power point for the Welding Power Source is
effectively earthed and of adequate current
rating.
• Plugs and cord extension sockets are correctly
wired.
• Flexible cord is of the 3-core tough rubber or
plastic sheathed type of adequate rating,
correctly connected and in good condition.
• Welding terminals are shrouded to prevent
inadvertent contact or short circuit.
• The frame of the Welding Power Source is
effectively earthed.
• Welding leads and electrode holder are in good
condition.
• The Welding Power Source is clean internally,
especially from metal filing, slag, and loose
material. If any parts are damaged for any
reason, replacement is recommended.
5.02 Cleaning the Welding Power
Source
!
WARNING
Refer to WARNING on page 3-2.
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 shunt and lead screw surfaces clean
as accumulated foreign material may reduce the
welders output welding current.