TroubleshooTing and sysTem TesTs
5-16 powermax
45
Service Manual
Control Board LEDs
The Powermax45 control board (PCB1) has 4 diagnostic LEDs.
The control board LEDs are:
• Start – The power supply has a start signal. This LED illuminates when the power supply receives a start signal and
remains illuminated during normal operation.
• Transfer – This LED illuminates when there is proper arc transfer between the torch and the workpiece, and will flash
during continuous pilot arc operation (such as when cutting expanded metal or moving the arc off the plate
and then back on).
• Error – The Error LED illuminates whenever there is a fault in the system. If the Fault LED on the front panel flashes
and the Error LED on the control board also flashes, there is a major fault in the system. The number of
flashes between pauses indicates which component may have failed.
• Reset – This LED illuminates when the reset circuit is active or the watchdog circuit fires.
During normal operation, the power ON LED on the front of the power supply and the Start and Transfer LEDs on the
control board illuminate. When a problem occurs with the system, one or more of the LEDs on the front of the power
supply and the Error LED or the Reset LED on the control board may illuminate or flash.
Control board
Ribbon cable
Reset/watchdog
Error
Transfer (XFR)
Start
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