Hypertherm HD4070 Rev.1 - Manual (Page 185)

5-22 HyPerformance HD4070 Instruction Manual
MAINTENANCE
Plasma interface board PCB5 status indicators
J 4
J 8
T P 4
J 7
J 6
J 2
J 3
J 1
Plasma interface PC board LED list
LED Signal name Function
D2 +24 Volts Power indicator, Always ON
D7 Ohmic Contact Illuminates when torch is in contact with plate
D9 Transfer Illuminates when arc transfers to plate
D10 Shield #1 Relay for THC #1. ON when circuit is closed
D12 Cooling Temp OK Coolant temperature at acceptable level, always ON
D13 Spare Input Not used
D14 +15 Volts Power indicator, Always ON
D15 Shield #2 Relay for THC #2. ON when circuit is closed
D17 Cooling Flow OK Sensor detecting good coolant flow
D18 Spare Output Not used
D20 -15 Volts Power indicator