Hypertherm HD4070 Rev.8 - Manual (Page 183)

MAINTENANCE
5-36 HD4070 Instruction Manual
3
Gas Console Control Board PCB2
D1
D11 D12 D13
D14 D16 D17
041657.eps
4070 .54
Always ON
U23
Gas Console Control PC Board LED List
LED Signal Name Function
D11 S1 Used, in combination with S2 and S3 to set state of gas console. See chart below
D12 S2 See above
D13 S3 See above
D14 + 5 VDC Power indicator
D16 + 12 VDC Power indicator
D17 – 12 VDC Power indicator
U23 LCD Display Shows the following:
– Revision number
– Inlet gas pressures
– Current operating state number
– Error messages
– Motor valve position
– Control voltage
Gas State Chart : LED Indicators (1= ON, 0= OFF)
LED D11(S1) D12(S2) D13(S3) State# Description
0 0 0 0 All outputs OFF
0 0 1 1 Preflow
0 1 0 2 Ignition
0 1 1 3 Spare (not used)
1 0 0 4 Pierce complete
1 0 1 5 Steady state
1 1 0 6 Rampdown
1 1 1 7 Spare (not used)