ESAB Aristotig 405 AC/DC, Service Manual

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A1 COMPONENT POSITIONS
Warning! The circuit and its parts are connected to mains voltage potential.
Key to the LEDs on A1:
LED1, red: Comes on when the temperature switch chain is interrupted
= overtemperature.
LED2, red: Comes on when primary overcurrent relay trips.
LED3, amber: Comes on when the mains switch contacts 13, 14 on Q1 are open.
A1 DESCRIPTION OF OPERATION
The description refers to the BLOCK DIAGRAM DTG 405 and to A1 COMPONENT POSITIONS.
Only those items that are connected to the inputs and outputs of the circuit board are described
here.
If there is a fault on the circuit board, the whole circuit board must be replaced. After replacing the
board, the machine must soft-started as described on STARTING UP.
a1b.pcx