Hypertherm XPR460 - Troubleshooting for Start Switch Faults; Diagnostic Codes 570, 571, 574 - 577

Table 35 - Minimum and maximum ohmic resistance values for thermistors
Thermistor temperature Minimum resistance (Ohms) Maximum resistance (Ohms)
25°C (77°F) 9,000 11,000
35°C (95°F) 5,000 7,000
45°C (113°F) 3,900 4,900
55°C (131°F) 2,500 3,500
65°C (149°F) 1,500 2,500
75°C (167°F) 1,000 2,000
85°C (185°F) 750 1,250
95°C (203°F) 600 1,000
105°C (221°F) 400 800
115°C (239°F) 300 600
125°C (257°F) 200 500
135°C (275°F) 150 400
145°C (293°F) 150 250
155°C (311°F) 125 225
165°C (329°F) 100 175
Troubleshooting for start switch faults
Diagnostic codes 570, 571, 574 – 577
Diagnostic codes 570 – 577 can identify problems with the CNC, PCB, discrete cable, or the D50 LED
on the control PCB (PCB 1) in the plasma power supply.
Diagnostics and Troubleshooting
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335811530Instruction ManualXPR460