MAXPRO200 Instruction Manual 807700 Revision 1 77
Operation
Power supply operation
General
• The system runs a number of tests automatically when the system is turned ON. See Automatic
chopper and current sensor tests during power-up on page 152.
• There is power to the control board and other non-high power components when the main disconnect
switch is on, even if the switch on the Power Supply is off. The switch is illuminated to indicate that
there is power to the system. Non-high power components include the low power control circuitry in
the chopper, but not the high-power IGBTs which are switched by the contactor.
• The 3-digit display counts from 1 to 6 to indicate the 6 second purge that occurs when you turn ON
the power supply (you will only actually see 1 thru 5). If the system is powered up with the start signal
on, the 3-digit display will continue to count up.
• When you turn ON the power to the system the displays shows the last process used.
• The user can lock out all inputs (current, plasma gas, and shield gas) to the system by pressing and
holding both the amps and shield gas control knobs until LOC appears in the 3-digit display. The same
process unlocks the system and ULC appears in the 3-digit display. The user can still cycle through the
functions in the 3-digit display area (current, fault, coolant flow, and test).
• All three displays show actual values during cutting. The user can make changes to the current, the
plasma gas, and the shield gas settings unless the inputs have been locked out or the system is being
controlled remotely. The displays show the set values when idle.
• A blinking red dot appears in the bottom right corner of each display when the parameters have been
changed from the default setting.
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