20Ap1:10 Control Panel Interface Circuits; 20Ap1 Circuit Board Versions - ESAB Aristo Mig 3001i Service Manual

2. When there is contact between electrode and workpiece. The power
source produces a current of about 24 A.
3. When the electrode is lifted from the workpiece.
The arc strikes, the open-circuit voltage control is deactivated and the
current increases to 30 A.
4. When the arc voltage exceeds 8 V, the current increases / decreases to
the set current.
5. If the arc voltage is above 45 V for more than 100 milliseconds the
open-circuit voltage control is activated.

20AP1:10 Control panel interface circuits

These circuits are only used by the Tig 3001i. See the service manual for the
TA23 and TA24 control panels.
20AP1 Circuit board versions
There are two hardware versions of the control board. See 'Open-circuit
voltage control' on page 33 for description of the difference in function between
the two versions.
The hardware ID and/or the print number of the circuit board is used to identify
the hardware version of the board.
To read the hardware ID you need the ESAT service kit, see page 45.
The print number is to the right in the component positions diagrams on pages
35 and 36. (The print number is NOT the same as the ordering number of the
board.)
Version 1 of 20AP1:
Hardware ID 5. Print numbers up to and including 487200-003.
Power sources with serial no. 835-xxx-xxxx and 840-xxx-xxxx are delivered
with version 1 of 20AP1.
Version 2 of 20AP1:
Hardware ID 9. Print numbers from 487200-004 and there above.
Power sources with serial no. 950-xxx-xxxx and there above are delivered with
version 2 of 20AP1.
Spare parts:
Version 2 of 20AP1 is delivered as spare part to all power sources.
Mig 3001i
Version 1 of 20AP1 with software prior to 1.06P:
The first Mig 3001i power sources had machine ID 45. From software version
1.06P most of the Mig 3001i have machine ID 46 (ID 45 is only used for
Tig 3001i).
If you have a Mig 3001i and a circuit board with software 1.06P and machine
ID 45, use ESAT and change to machine id 46.
If you have a software prior to 1.06P, upgrade to 1.06P or a later version and
set the machine ID to 46.
Note! To accept machine ID 46 the welding data unit (the control panel) must
have following software or later
MA23, MA23A, MA24, A24: 1.06H
U6: 2.00A
U8: 1.50K
ca41_20_1
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