Edition 050614
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cu20d1
Component Description
10YV1 Gas valve. See the description of 20AP2:6 on Page 47.
15 Power module. Wire numbers 1500--1699. See the schematic diagram
and description on Page 25.
15AP1 Power board.
15AP2 Driver board.
15AP3 Current sensor. See the description of 20AP1:8 on Page 36.
15BR1 Rectifier bridge. See the description of 15AP1:1 on Page 26 and the
assembly instructions on Page 55.
15D1, 15D2 Rectifier and freewheel diode modules. Each module consists of two
diodes.
15D1 rectifies the welding current. During the time interval between two
voltage pulses from transformer 15TM1, the freewheel diodes 15D2
maintain the welding current from inductor 15L3.
See Page 55 for assembly instructions for the diode modules.
15EV1, 15EV2 Fans, 24 V DC. See the description of 20AP1:2 on Page 33.
15L1, 15L2 2 + 2 ferrite rings. Reduce transient voltages produced when the diode
modules 15D1 and 15D2 turn off.
15L3 Inductor.
15Q1, 15Q2 IGBT transistors. See the description of 15AP1:2 on Page 27 and the
installation instructions on Page 55.
15ST1 Thermal overload cutout, in the winding of main transforme r TM1. See the
description of 20AP1:4 on Page 35.
15ST2 Thermal overload cutout, mounted on the heat sink for the IGBT modules.
See the description of 20AP1:4 on Page 35 and the installation
instructions on Page 55.
15TM1 Main transformer.
20AP1 Controller circuit board.
20AP2 Relay board.
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