Hypertherm Powermax30 XP Service Manual - Manual (Page 59)

Powermax30 XP Service Manual 808150 Revision 1 59
5 – Troubleshooting and System Tests
External inspection
1. Inspect the exterior of the power supply for damage to the cover and external components, such as the power cord
and plug.
2. Inspect the torch and the torch lead for damage.
3. Inspect the consumables for damage or wear.
4. Repair or replace components as necessary.
Internal inspection
1. Set power switch to OFF (O), disconnect the power cord from the power source, and disconnect the gas supply.
2. Remove the power supply handle and cover. (See Remove the power supply cover on page 88.)
3. Remove the component barrier. (See Remove the component barrier on page 90.)
4. Inspect the inside of the power supply, especially the side with the power board. Look for broken or loose wiring
connections, burn and char marks, damaged components, and so on.
5. Repair or replace components as necessary.
Initial resistance check
All resistance values must be taken with the power cord disconnected and all internal power supply wires attached.
Perform the steps in
Internal inspection (above) before continuing in this section.
 The type of multimeter you use significantly affects the results of the tests in this section. The resistance values in this
manual are intended as a general reference point.
 If resistance values indicate a problem based on the range of values provided in this section, isolate the problem by
removing wires attached to the resistance check points or component until the problem is found.
 After the problem is located and repaired, see Sequence of operation on page 56 to test the power supply for proper
operation.