Table of Contents
Advertisement
20AP2:5
Cooling water monitoring in TIG welding mode
Microswitch 5S1 in the water lock connector closes
when a cooling water hose is connected to the blue
water connector on the front of the cooling unit. The
pump stops if the switch opens.
Contact 5SL1 in the flow guard closes when the water
flow rate exceeds 0.7 l/minute. The flow guard is an
accessory: if no flow guard is fitted, connections
XS18:3 and XS18:4 are linked.
The following description refers to cooling units with a
flow guard: machines without a flow guard behave as if
cooling water is always flowing.
Starting the welding equipment
1.
The MMC panel senses whether microswitch 5S1 is closed.
2.
If 5S1 is closed, the panel generates a command to start the pump. If
water flow is not detected within 15 seconds, the pump is stopped.
3.
If welding does not start within 6.5 minutes, the pump is stopped.
If the water flow stops when the pump is started, the fault indication lamp on
the MMC will flash. Machines with a display panel show fault code 29.
The pump is stopped if microswitch 5S1 opens.
Starting to weld
1.
The welder presses the trigger switch on the welding gun.
2.
The water pump starts if microswitch 5S1 is closed.
3.
If water flow is achieved within three seconds, welding starts.
If water flow is not detected within three seconds, the pump is stopped.
If the water flow stops during welding, welding will be interrupted and the fault
indication lamp on the MMC panel will flash. Machines with a display show
fault code 29.
Stopping welding
1.
The welder releases the welding gun trigger switch.
2.
Welding stops.
3.
The water pump continues to run for a further 6.5 minutes.
If welding is restarted while the pump is still running, the pump will continue to
run as required, i.e. the 6.5 minute shutdown countdown is interrupted.
cu19_20_2
- - 46 - -
Water lock
S0740 800 191/E080229/P78
Hide quick links:
Advertisement
Table of Contents
