Hypertherm HD4070 Rev.8 - Manual (Page 148)

HD4070 Instruction Manual 5-1
7
Section 5
MAINTENANCE
In this section:
Introduction ...............................................................................................................................................................5-2
Routine Maintenance ................................................................................................................................................5-2
HD4070 System Description.....................................................................................................................................5-3
Control and Signal Cables ...............................................................................................................................5-3
Power Supply Coolant System Servicing .................................................................................................................5-4
Torch Coolant Draining .............................................................................................................................................5-6
Power Supply Coolant Draining ................................................................................................................................5-6
Coolant System Filter ...............................................................................................................................................5-7
Filter Replacement ...........................................................................................................................................5-7
Coolant Flow Test Procedure....................................................................................................................................5-8
HD4070 Process Sequence .....................................................................................................................................5-9
Initial Checks...........................................................................................................................................................5-11
Power Measurement ..............................................................................................................................................5-12
Service Display Screens .........................................................................................................................................5-13
Error Codes ............................................................................................................................................................5-14
Error Code Troubleshooting- 1 of 4................................................................................................................5-15
Error Code Troubleshooting- 2 of 4................................................................................................................5-16
Error Code Troubleshooting- 3 of 4................................................................................................................5-17
Error Code Troubleshooting- 4 of 4................................................................................................................5-18
Electrical PC Boards and Power Supplies ..............................................................................................................5-19
PC-104 Test Procedure ..................................................................................................................................5-20
Plasma Interface Board PCB5 status Indicators ............................................................................................5-22
Breakout Board PCB6 status Indicators.........................................................................................................5-23
Control Board PCB3 status Indicators ...........................................................................................................5-27
Power Distribution Board PCB4 Status Indicators .........................................................................................5-28
Start Circuit Assembly Board PCB2 ...............................................................................................................5-29
Pilot Arc Current Levels..................................................................................................................................5-29
Start Circuit Functional Schematic .................................................................................................................5-30
Start Circuit Troubleshooting..........................................................................................................................5-30
Gas Console Relay Board PCB1 and PCB3 – LED Description Lists ...........................................................5-31
PCB1 and PCB3
LED Sequences – O
2
Cutting .............................................................................................5-32
PCB1 and PCB3 LED Sequences – H35/N
2
Cutting .....................................................................................5-33
PCB1 and PCB3 LED Sequences – H5/N
2
Marking ......................................................................................5-34
PCB1 and PCB3 LED Sequences – N
2
/N
2
Marking ......................................................................................5-35
Gas Console Control Board PCB2 .........................................................................................................................5-36
Leak Test Procedure ...............................................................................................................................................5-37
Setting Regulator Pressure.....................................................................................................................................5-37
Chopper Module Test Procedure ............................................................................................................................5-38
Phase Loss Detection Board PCB1 Status Indicators and Operation ....................................................................5-40
THC Routine Maintenance .....................................................................................................................................5-41
X-Y Lifter Sealing Band–Replace...................................................................................................................5-41
THC Motor Drive Board ..........................................................................................................................................5-45
THC Power Supply .................................................................................................................................................5-46
THC Control Board .................................................................................................................................................5-47
Preventive Maintenance .........................................................................................................................................5-49