MAINTENANCE
3-8
Service Manual
TROUBLESHOOTING
The troubleshooting procedures include the
Troubleshooting Guide, Resistance Checks
and the
Voltage Checks.
The complexity of the circuits require that service technicians have a working knowledge of inverter
power supply theory. In addition to being technically qualified, technicians must perform all testing
with safety in mind.
If questions or problems arise during servicing, call the Hypertherm Technical Services Department at
1 800 643 9878, or email Technical Services at: - service@hypertherm.com.
Test Equipment
• Multimeter
Troubleshooting Procedures
Maintenance of the Powermax900 power supply consists of performing visual inspection and trouble-
shooting procedures.
• Refer to the system wiring diagram when performing the checkout procedures.
• To locate power supply components refer to Sections 4, 5 or 6. Refer to Section 7 for torch
components.
• After the problem has been located and repaired, refer to the
Sequence of Operation
flow
diagram in this section to test the power unit for proper operation.
Visual Inspection - External
1. Inspect the outside of the power supply for damage to the cover and external components.
2. Inspect the torch and the torch lead for damage.
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