DESCRIPTION OF OPERATION
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© ESAB AB 2017
Self-test
When power is supplied, the welding data unit runs a self diagnostic program test.
1. Internal RAM memory is checked by a read/write test of each memory position. If the
test detects a fault, fault code E2 will be logged.
2. The program memory of the welding data unit is checked by a check-sum test. If the
test detects a fault, fault code E1 will be logged.
3. The external RAM memory is checked by a read/write test of each memory position.
If the test detects a fault, fault code E3 will be logged.
4. At the end of the test the current software version is displayed briefly.
5. After the self-test is finished, the display shows the measurment menu.
1AP1:1 Power supply and CAN bus
Circuit diagram for the power supply
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