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Check the power switch, Powermax1250 – Hypertherm Powermax1250 Service Manual User Manual

Page 41

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4

MAINTENANCE

3-8

powermax1250

Service Manual

Check the power switch

1. With the power disconnected, set the ON/OFF switch (S1) to ON (I).

2. Check the resistance across the input leads.

3. Check the resistance from the input leads to ground.

Notes:

With the power disconnected and the ON/OFF switch (S1) set to OFF (O), all circuits should read as
open. All electrical values shown are ±25%.

2.4 M

2.4 M

2.4 M

>20 M

If no problems were found during the inspection or the initial resistance check, and the power supply still does not
operate correctly, see the

Troubleshooting guide.

Note:

The

Troubleshooting guide provides most probable causes and solutions. Study the system

wiring diagram and understand the theory of operation before troubleshooting. Before
purchasing a major replacement component, verify the problem with Hypertherm Technical
Service or the nearest Hypertherm repair facility.