Maintenance
HPR400XD Auto Gas – 806160 5-3
Introduction
Hypertherm assumes that the service personnel performing the troubleshooting testing are high-level
electronic service technicians who have worked with high-voltage electro-mechanical systems. Knowledge
of final isolation troubleshooting techniques is also assumed.
In addition to being technically qualified, maintenance personnel must perform all testing with safety in
mind. Refer to the Safety section for operating precautions and warning formats.
Routine maintenance
See Preventive Maintenance, located at the end of this section, for maintenance information. Contact the Technical
Services department listed at the front of this manual with any questions regarding maintenance procedures.
WARNING
SHOCK HAZARD
Use extreme care when working near the chopper modules. Each large electrolytic capacitor (blue-
cased cylinder) stores large amounts of energy in the form of electric voltage. Even if the power is
off, dangerous voltages exist at the capacitor terminals, on the chopper, and the diode heatsinks.
Never discharge any capacitor with a screwdriver or other implement… explosion, property
damage and/or personal injury will result.
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