ESAB Caddy Tig 1500i TA34, Service Manual

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DESCRIPTION OF OPERATION
0740 800 186 - 26 - © ESAB AB 2016
• The machine ID defines which type of power source the board is intended for.
• The hardware ID shows design and type of circuit board.
• The unit type is used for identification on the CAN bus.
The ID numbers of the power sources are:
Tig 1500i Tig 2200i
Machine ID = 35 Machine ID = 36
Hardware ID = 4 Hardware ID = 4
Unit type = 2 Unit type = 2
Welding data unit and MMC
The machine ID for the MMC part of the control board determines which type of control panel
that is used. The machine ID can be changed by ESAT.
The ID numbers of the different control panels are:
TA33 machine ID = 37
TA34 machine ID = 20
Hardware ID = 4
Unit type = 0
20AP1:1 Power supply
+5 V and +2.5 V
IC6 monitors the 24 V voltage supply to the 5 V regulator on circuit board 2AP1. IC16
monitors the 5 and 2.5 V supplies. Regulator VR4 supplies the processor with +2.5 V.
The voltage on terminal PS4 is normally about 24 V, when this drops below 20 V, pin 14 of
IC6 goes low, providing the processor with a low power supply voltage signal. The processor
then stores current data and generates fault code E4. When the 5 and 2.5 V voltages are
passing below their treshold values, the processor receives a reset signal from IC16.
Fault code E4 is not displayed at normal power off.