Tweco 42 CutMaster Service Manual - Manual (Page 51)

TROUBLESHOOTING CUTMASTER 42
Manual 0-5171 6-15 Troubleshooting
J8
1 Power source of fan 24VDC
2 0VDC(fan negative)when fan is on 0VDC
J9
1 N/A N/A
2 GND 0VDC
3 Pilot ARC current feedback signal -0.8VDC
+5VDC( A main cutting arc is established)
J10
1 Positive of voltage feedback Machine output +
2 Negative of voltage feedback Machine output _
J11
1 +12VDC +12VDC
2 Pilot ARC IGBT drive signal
J12
1 N/A N/A
2 Thermostat (0VDC when thermostat
closed)
3 GND 0VDC
J13
1 Pressure switch signal Pressure switch(0dc when switch closed
otherwise 4VDC)
2 GND 0VDC
J14
1 GND 0VDC
2 Gun switch signal 0VDC when switch on otherwise 27VDC
3 Cup test signal 0VDC
4 Cup test signal 0VDC when the cup is fixed otherwise 27VDC