Miller Electric 852 Maintenance and Troubleshooting, Controls CE Models, Routine Maintenance

.A complete Parts List is available at www.MillerWelds.com

5-2. Controls (CE Models)

300 Amp Model Shown

1 2 3 4 5

9 8 7 6

Ref. ST-173 450-B

1Polarity Selector Switch (Optional On 50 Hz Models)

To change polarity on models not equipped with a Polarity Selector switch, reverse work and electrode cables at the weld output termi- nals (see Section 4-8).

YTurn Off Power before reversing cables.

2 Arc Force (Dig) Control

Control increases SMAW short-circuit amper- age which allows the operator to use a very

short arc length without sticking the electrode.

Set control at 0 for normal welding amperage. Turn clockwise to increase short-circuit amperage.

3 Hot Start Switch

Turn switch On for SMAW and Off for GTAW welding.

4Amperage Adjustment Control

5Digital Meters (Optional)

6Power Switch With Indicator Light

7High Temperature Shutdown Light

8 Remote Amperage Control Switch

For front panel control, place switch in Panel position. For remote control, place switch in Remote position, and connect remote device (see Section 4-11).

9 Output Switch (Contactor)

For front panel control of output, place switch in Panel position. For remote control of output, place switch in Remote position, and connect remote device (see Section 4-11).

YTurn Off power before connecting re- mote device.

SECTION 6 − MAINTENANCE AND TROUBLESHOOTING

6-1. Routine Maintenance

Y Disconnect power before maintaining.

3 Months
Replace	Repair or	Clean and
	replace	tighten weld
unreadable
	cracked	terminals.
labels.
	weld cable.
6 Months
Blow out or
vacuum inside.	OR
During heavy
service, clean monthly.
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