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MAINTENANCE
D-2 D-2
POWER WAVE 655/R
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SAFETY PRECAUTIONS
ELECTRIC SHOCK can kill.
• Only Qualified personnel should
perform this maintenance.
• Turn the input power OFF at the
disconnect switch or fuse box
before working on this equipment.
• Do not touch electrically hot parts.
ROUTINE MAINTENANCE
PERFORM THE FOLLOWING DAILY:
1. Check that no combustible materials are in the
welding or cutting area or around the machine.
2. Remove any debris, dust, dirt, or materials that
could block the air flow to the machine for cooling.
3. Inspect the electrode cables for any slits or punc-
tures in the cable jacket, or any condition that would
affect the proper operation of the machine.
PERIODIC MAINTENANCE
PERFORM PERIODICALLY:
Clean the inside of the machine with a low pressure air
stream. Clean the following parts. Refer to Figure D.1.
• Transformer and output rectifier assembly.
• Electrode and work cable connections.
• PC board connections..
• Intake and outlet louvers on the machine case.
• Any obvious accumulations of dirt within the machine.
• Fan Assembly.
NOTE: The fan motor has sealed bearings which
require no maintenance.
CALIBRATION SPECIFICATION
Calibration of the PW-655/R is critical to its opera-
tion. The output Voltage and Current are calibrated
at the factory and generally speaking the calibra-
tion will not need adjustment. However, neglected
or improperly calibrated machines may not yield
satisfactory weld performance. To ensure optimal
performance, the calibration of output Voltage and
Current should be checked yearly.
The calibration procedure itself requires the use of a
grid (Resistive Load Bank), and certified actual
meters for voltage and current. The accuracy of the
calibration will be directly affected by the accuracy of
the measuring equipment you use. The
Diagnostics Utility includes detailed instructions,
and is available on the Power Wave Submerged
Arc Utilities disc that comes with the machine, on
the Service Navigator DVDʼs or on
Powerwavesoftware.com
. If the system does not
calibrate properly see the troubleshooting section of
this manual.
WARNING