Control Board - Lincoln Electric INVERTEC 170S Service Manual

Control Board (User Interface)
Control Board takes signals (Iout, Vout, Iset),
shows the proper value on the display and
generate the proper set reference for inverter
board: manages stick function (soft crisp,hot start,
arc force, antisticking). Manages input error
(overvoltage), precharge of capacitor phase, fan
and thermal error. It feeds this information to the
WeldController. The Weld Controller is a micro-
processor that uses these signals along with input
from the Mode Switchand the Control

CONTROL BOARD

Potentiometer to make decisions and change the
machine mode and output to satisfy the
requirements as decided by the operator. These
changes are relayed to the PWM circuit on the
Inverter Board to regulate the gate signals to the
IGBT"s.
The Weld Controler also responds to thermal and
input errors to shut down the machine output.
The error information is then displayed by the
LEDs on the front panel.
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