Hypertherm Powermax105 Service Manual - Manual (Page 194)

TroubleshooTing and sysTem TesTs
8-56
powermax
105 Service Manual
test 9 – Electronic regulator
Symptom: Air flows continuously through the torch.
1. Turn off the machine and disconnect power.
2. Disconnect the electronic regulator control cable (J6) from the power board.
• If air continues to flow, replace the electronic regulator.
• If the air stops flowing, verify the DSP board by replacing it with a known good one. If the DSP board is not the
problem, replace the power board.
Electronic
regulator J6
Pressure sensor J3 Pressure switch/auxiliary
contactor J5
Inverter temperature
sensor J2
Fan J1