Miller Electric MOG-350, MOG-300, MOG-250, MOG-Pak, MOG-400, RGC Overload Protection, Troubleshooting

5-2. Overload Protection

Grid Rear Panel

1

Multi-Grid Rack

Fuse link F1, or fuse links F1 and F2 for dual models, protect the grid from overload damage. If weld output stops, check link(s) as follows:

Turn Off welding power source and disconnect input power.

1Fuse Link (See Parts List For Rating)

Check and replace fuse link(s), if necessary.

Close rear access door.

Ref. ST-124 643-A / Ref. ST-161 156-A

5-3. Troubleshooting

	Trouble	Remedy
No weld output.		Check and replace open fuse link(s), if necessary (see Section 5-2).
		Check electrical input and output connections (see Section 3-3).
Erratic or improper weld output.		Select correct size weld cables according to Section 3-7.
		Clean and tighten weld cable connections (see Section 3-3).
		For dual models, be sure paralleling switch is in proper position (see Section 4-7).
		If using remote control, be sure Fine Amperage control and 2-1/2 Ampere switch on grid are in the Off
		position (see Section 4-5).

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