ESAB Caddy Mig C200i Service Manual page 17

The start signal from the welding torch is the basic input of the command system.
As shown on the fig. the start signal can be disabled in several cases:
thermal protection from the primary side (IC2),
S
S thermal protection form the secondary side (CN4.5,6),
torch switch is pressed during the power up (charging of the C342, hold by the
S
pressed switch)
lack of the +24V_ENABLE signal
S
As shown any of listed cases keeps the ENABLE line low. Note that even after
removal all listed error signals, the machine is kept in disable state, until the torch
switch is released. This is additional protection of unintentional switching on.
The command system is not shown entirely. The sequence of operation of the
subassemblies of the semiautomatic welder is shown on the fig.
Note that there are no proportions on this drawings.
s1Cad200
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Edition 101222