Hypertherm HSD130 HySpeed Plasma - Manual (Page 186)

MAINTENANCE
5-40 HySpeed HSD130 RHF Instruction Manual
Torch lead test
1. Turn OFF all power to the system.
2. Locate the pilot arc controller.
TO WORK
TO NOZZLE
J3
J4
TO WORK
TO NOZZLE
J3
J4
3. Install a temporary jumper wire between J4 (work) and J3 (nozzle) on the start circuit PCB1.
4. Measure the ohm value between the nozzle and the plate. The reading should be < 3 ohms. A measurement
> 3 ohms indicates a faulty connection between the torch and ignition console, or between the ignition console and
the power supply.
5. Verify that the pilot arc wire on the torch lead is not damaged. If it is damaged, replace the lead. If it is not damaged,
replace the torch head.
DANGER
SHOCK HAZARD: Always use extremecaution when servicing a power supply when it is plugged in and
the covers are removed. Dangerous voltages exist within the power supply which could cause injury
or death.