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Troubleshooting preparation, Test equipment, Troubleshooting procedures and sequence – Hypertherm Powermax1250 Service Manual User Manual

Page 39: External inspection, Powermax1250

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MAINTENANCE

3-6

powermax1250

Service Manual

Troubleshooting preparation

The complexity of the circuits requires 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 nearest Hypertherm Technical Services Department listed in
the front of this manual.

Test equipment

• Multimeter
• IGBT tester (part number 128883)

Troubleshooting procedures and sequence

When performing the troubleshooting procedures,

• Refer to Section 6 for the system wiring diagram;

• Refer to Section 4 to locate power supply components;

• Refer to Section 5 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 supply for proper operation.

External inspection

1. Inspect the exterior of the power supply for damage to the cover and external components.

2. Inspect the torch and the torch lead for damage.

Power OFF and

disconnected

External inspection

Power ON

Internal inspection

Resistance checks

Troubleshooting

guide

Troubleshooting

tests