Hypertherm Powermax1000 Service Manual - Manual (Page 61)

MAINTENANCE
3-28
powermax1000
Service Manual
1
Test 14 – AUX switch
If the AUX switch on the I/O switch (S1) is open when the system is powered up, the IF LED on the control board
will illuminate when the torch trigger is pulled or the start switch is pressed.
• Remove the J3 connector from the power board.
• With the ON/OFF switch in the OFF (O) position and the unit unplugged from electrical power, the AUX
switch should read as open.
• With the I/O switch in the ON (I) position, the AUX switch should read as closed.
Test 15 – flyback circuit failure
Multiple flashing indicator LEDs can signal a failure in the flyback circuit.
• Unplug the fan. If the LEDs no longer flash, replace the fan. If the lights are still flashing, plug the fan in
again and perform the next step.
• Unplug the solenoid valve. If the LEDs no longer flash, replace the solenoid valve. If the lights are still
flashing, plug the solenoid valve in again and perform the next step.
• Unplug the CNC interface cable or the ON/OFF pendant on the back of the machine.
• If the lights are still flashing, measure for 5 VDC on the power board (R15 or J5 pin 2 to TP1). If the value is
not a constant 5 VDC (±0.5V), disconnect the control board and measure for 5 VDC again. If it is still not a
constant 5 VDC, replace the power board (PCB2).
• If no problems are found while completing the previous steps, replace the control board (PCB3).