SanRex SANMIG 200MF Operator's Manual page 22

8 Shield gas connector Is connected to the gas input pipe of torch.
9 Aero socket Is connected to torch switch control wire.（It has 14 leads and lead 8 - lead 9 are connected to torch switch control wire）.
10 Negative output The welder's negative polarity output.
11 Shield gas input joint To connect one head of the gas hose while the other head of which is connected to argon gas cylinder.
Switch to "ON", the welder is turned on, while switch to "OFF", the welder is turned off.
12 Power source switch
13 Power source input To connect power source.
14 Fan When the electric welding machine is over-heat, the fan operates. It is used for cooling the components and parts inside the welder.
MAINTENANCE &TROUBLESHOOTING
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