7-11. Overload Protection

 

Y Turn Off

wire

feeder and

 

 

welding power source. Stop

 

 

engine

on

welding

 

 

generator.

 

 

 

If fuse opens, unit shuts down. To

3

replace fuse, proceed as follows:

1

Fuse Holder Cover

 

 

2 Fuse F1 (See Parts List)

 

3

Circuit Breaker CB1

1

If CB1 opens, the gun drive motor,

 

gas valve, and contactor will not

 

operate when trigger is pulled. The

 

gun drive motor operates in the Jog

 

mode with CB1 open.

 

2

Check for blocked gun liner.

 

Check for jammed wire, binding

 

drive gear or misaligned drive rolls

 

in feeder. Correct problem.

 

Allow cooling period and manually

 

reset breaker. Close and latch door.

Ref. 801 577 / Ref. 800 185-A

7-12. Water Flow Switch (Optional For Water-Cooled Models)

The water flow switch protects the gun from overheating. If coolant flow rate drops below 1 qt/min, the water flow switch opens and stops the welding wire from feeding. See Section 7-13for remedies to this trouble.

OM-1594 Page 39

Page 45
Image 45
Miller Electric XR Control manual Overload Protection, Water Flow Switch Optional For Water-Cooled Models, Turn Off Wire