Hypertherm HT4001 Plasma Arc Cutting System - Manual (Page 128)

MAINTENANCE
6-2
HT4001
Instruction Manual
Introduction
The HT4001, and all Hypertherm plasma systems, undergo rigorous testing prior to shipment and should require
little maintenance if proper installation and operation procedures are followed.
In this section are: routine maintenance procedures, initialization and sequence of operation flowcharts, an initial
checks procedure, a troubleshooting guide to aid in servicing the HT4001 system including a troubleshooting guide
for the STATUS indicators, a chopper module test procedure and a description of the relay board status LEDs.
Hypertherm assumes that the service personnel performing the troubleshooting testing are high-level
electronic service technicians that 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.
If you need additional assistance or need to order parts, call our Customer Service or Technical Service Group at
1-800-647-9878.
WARNING
SHOCK HAZARD: The large electrolytic capacitor(s) (blue-cased cylinder(s)) store 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 the capacitor(s) with a screwdriver
or other implement … explosion, property damage and/or personal injury will result. Wait at least five
minutes after turning the power supply off before touching the chopper or the capacitor(s).