Hypertherm Powermax45 Service Manual - Manual (Page 80)

TroubleshooTing and sysTem TesTs
5-4
powermax
45 Service Manual
Sequence of operation
Power OFF
• Connect the gas supply to the air fitting on the power supply.
• Connect the work lead to the workpiece.
• Plug in the power supply and make sure incoming power is ON if using a
line-disconnect box.
• Set the ON/OFF switch (S1) to ON (I).
• Set the power switch (S1) to OFF (O).
• The gas solenoid valve (V1) closes.
• The gas flow stops.
• The arc extinguishes.
• Gas continues to flow for 20 seconds.
• Drag the torch lightly across the workpiece to
make a cut.
• The workpiece drops after the cut.
• Release the plasma start trigger on the hand
torch or the remote start switch for the machine
torch.
• The gas solenoid valve (V1) opens.
• The gas flow starts.
• The cutting arc starts.
• Position the torch on the workpiece.
• Pull the plasma start trigger on the hand torch
or press the remote start switch for the machine
torch.
• The gas solenoid valve (V1) closes.
• The gas flow stops.
• The power circuits are ready.
• Turn the amperage adjustment knob to the gas test position.
• The gas solenoid valve (V1) opens to purge the system and to allow the
gas pressure to be set.
• The green power ON LED illuminates, indicating the system is ready for
operation.
• All the fault LEDs should be extinguished (see the Troubleshooting guide
on page 5-11 for more information).
• Verify that the gas pressure LED illuminates green and is centered in the
pressure bar.
• Set the amperage adjustment knob to the desired output current (between
20 and 45 amps) based on the thickness of the metal to be cut.
• Set the mode switch to the desired mode for cutting or gouging.