Resistance checks -7, Powermax1650, Resistance checks – Hypertherm Powermax1650 Service Manual User Manual
Page 34
MAINTENANCE
powermax1650
Service Manual
3-7
0
Resistance Checks
All resistance values must be taken with the power cord disconnected and all internal power supply wires attached.
Perform Visual Inspection – Internal before continuing in this section.
• If resistance values are not close to the values given 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 has been located and repaired, refer to the Sequence of Operation flow diagram in this
section to test the power unit for proper operation.
Resistance Check #1
1. With the power disconnected, set the ON/OFF switch S1 to ON.
2. Check resistance across input leads.
3. Check resistance from input leads to ground.
Note: All values are ±15%.
2.4 M
Ω
2.4 M
Ω
2.4 M
Ω
>20 M
Ω
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