CHAPTER 4: OPERATING INSTRUCTIONS
IS-300CA INVERTER POWER SUPPLY
4-2 990-414
Section II: Operation
If no secondary toroidal coil is connected, make sure that the Power Supply mode is
set to PRIMARY RMS or PRIMARY LIMIT or you may damage the Power Supply.
Starting Welding Operation
1. Turn the input power ON. After approximately 7 seconds you will hear the contactor turn on,
the power light should be on but ready light will turn on when all 3 “Weld On” inputs are enabled.
2. Press the MENU key on the Pendant to see the MENU screen.
3. Move the cursor to SCHEDULE MODE and press the ENTER key.
4. Set each item as described in Chapter 3.
5. Again press the MENU key to bring back the Menu screen.
6. Move the cursor to
SCHEDULE and press the ENTER key.
7. Set each item as described in Chapter 3.
NOTE: For initial set-up, current settings should be a little lower than predicted to prevent work
piece damage from excessive currents.
8. Re-set the schedule so that the work piece will be welded adequately.
9. When welding multiple work pieces with multiple schedules, change SCHEDULE # and set new
time and welding currents.
10. Set the upper and lower limits on the
MONITORSET screen for each SCHEDULE#.
Check the Valve Sequence
1. Press and hold the Power Supply WELD ON/OFF switch until the green LED turns off.
2. Initiate a start signal when the READY lamp is not on, and check each sequential operation.
WARNING: When confirming the operation, check that the Squeeze time (SQZ) is sufficient.
If the welding current begins before the welding electrodes have reached sufficient force,
expulsion is produced.
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