Hypertherm HT4001 Plasma Arc Cutting System - Manual (Page 154)

MAINTENANCE
3-98
6-28
HT4001
Instruction Manual
Error Codes
The microcontroller on control board PCB2 will alert the user when certain errors occur in the HT4001 system, by
flashing the ERROR CODE LED on the control board. The power supply front cover must be removed to observe
control board PCB2 and the ERROR CODE LED (see Figure 7-1 for location of PCB2 and Figure 6-10 for location
of ERROR CODE LED on PCB2)
The ERROR CODE LED will blink on for .5 seconds and off for .5 seconds with a two second gap before repeating
the blinking sequence. An explanation of the error codes appears on the following page.
During the error code flashing, all outputs from the control board are turned off, and the power supply is in an idle
mode. After the error is corrected, you may resume operation of the system by activating the START signal.
Note: If the ERROR CODE LED remains on without blinking, this indicates that a microcontroller
internal RAM or ROM self-check error has occurred (power supply will hang up).
For troubleshooting purposes, the PLASMA START LED is also shown in Figure 6-10. When lit, this LED indicates
that the plasma START command has been received at the control board.
Postflow Gas Control
Disconnected terminals at connector PL2.5 will give the torch 10 seconds of postflow gas.If the terminals are
connected together, the torch will have no postflow gas.
Figure 6-10 HT4001 Control Board Error Code LED Location
Error Code-LED
Plasma Start-LED PL2.5