Check the power switch, Powermax1250 – Hypertherm Powermax1250 Service Manual User Manual
Page 41
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
Ω
2.4 M
Ω
2.4 M
Ω
>20 M
Ω
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.
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