Firepower MST 220i, Operating Manual

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FIREPOWER MST 220i
Manual 0-5343 3-15 INSTALLATION/SETUP
17. Wiredrive Motor Circuit Breaker
The 4A Circuit Breaker protects the unit from electrical faults and will operate in the event of a motor overload.
NOTE
If a circuit breaker trips, a short cooling period must be allowed before an attempt is made to reset the
unit by pressing the circuit breaker reset button
.
18. Local / Remote Switch (located in wirefeed compartment)
The local/ remote switch is used only when a remote control device (such as a TIG torch with remote current
control) is fitted to the unit via the remote control socket (item 9). When the local/ remote switch is in the
remote position, the unit will detect a remote device and work accordingly. When in the local mode, the unit
will not detect the remote device and will operate from the power source controls only. Note that the trigger
will operate at all times on the remote control socket irrespective of the position of the local/ remote switch
(ie in both local and remote modes).
Should a remote device be connected and the local/ remote switch set to remote, the maximum setting of
the power source will be determined by the respective front panel control, irrespective of the remote control
device setting. As an example, if the output current on the power source front panel is set to 50% and the
remote control device is set to 100%, the maximum achievable output from the unit will be 50%. Should 100%
output be required, the respective front panel control must be set to 100%, in which case the remote device
will then be able to control between 0-100% output.
19. Burnback Control (located in wirefeed compartment)
The burnback control is used to adjust the amount of MIG wire that protrudes from the MIG gun after the
completion of MIG welding (commonly referred to as stick out). To decrease the burnback time (or lengthen
the amount of wire protruding from the MIG gun at the completing of welding), turn the burnback control
knob anti-clockwise. To increase the burnback time (or shorten the amount of wire protruding from the torch
at the completing of welding), turn the Burnback Control knob clockwise.
20. MIG Gun & Spool Gun Switch
The MIG Gun / Spool Gun switch is used to switch welding mode between MIG Gun functionality and Spool
Gun functionality
21. Cooling Fan
The Firepower MST 220i is designed with an intelligent fan control. When the 220i is switched ON the cooling
fan will come ON for approximately 3 seconds then automatically switch the fan OFF. The cooling fan will remain
OFF until it is required for cooling purposes. This has two main advantages; (1) to minimize power consump-
tion, and (2) to minimize the amount of contaminants such as dust that are drawn into the power source.
Note in STICK mode the fan operates continuously.