Hypertherm Powermax 125 Service Manual

Powermax125 Service Manual 808070 113
8 – Troubleshooting and System Tests
Troubleshooting preparation
The complexity of the system 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 Hypertherm Technical Services team listed in the front of this
manual.
Test equipment
 Multimeter
 IGBT tester (128883)
Troubleshooting procedures and sequence
When performing the troubleshooting procedures, refer to:
 Safety and Compliance Manual (80669C) for detailed safety information.
 Power Supply Component Replacement on page 165 or Torch Component Replacement on page 265.
 Troubleshooting and System Tests on page 109.
 Wiring Diagrams on page 315.
After the problem has been located and repaired, refer to Sequence of operation on page 112 to test the power supply
for proper operation.
Power OFF (O) and disconnected
External inspection
Internal inspection
Initial resistance check
Power ON (I)
Troubleshooting guide and Fault codes
System tests

Hypertherm Powermax 125 Specifications

General

Output Current	30-125 A
Input Power	15.2 kW
Open Circuit Voltage	300 VDC
Gas Supply	Clean, dry, oil-free air or nitrogen
Input Power Cable Length	10 ft (3 m)
Rated Output Current	125 A
Gas Type	Air or nitrogen
Cutting Capacity	1-1/4 inch (32 mm)
Pierce Capacity	1 inch (25 mm)
Input Voltage	200-600 V, 3-PH
Duty Cycle	100% @ 125 A
Certifications	CSA
Maximum Clean Cut Thickness	1-1/4 inch (32 mm)
Cooling Method	Fan-cooled
Torch Options	Hand