Miller Welding Machine Maxtron 450 CC/CV

DANGER! Significant DC voltage can remain on capacitors after unit is Off. The input capacitor voltage can be measured across terminals on input rectifier SR1. Always check the voltage as shown to be sure the input capacitors have discharged before working on unit.

1. Tum Off welding power source, and disconnect input power.

3. Measure the DC voltage across the positive (+) and negative (-) terminals until voltage drops to near 0 (zero) volts.

4. Proceed with job inside unit.

5. Reinstall top cover when finished.;

1. Replace Damaged Or Unreadable Labels.

2. Repair Or Replace Cracked Cables.

4. Repair Or Replace Cracked Cables And Cords.

5. Clean And Tighten Weld Terminals.

* Every 6 Months - Blow Out Or Vacuum Inside.;

DANGER! Turn Off welding power source, disconnect input power, and check voltage on input capacitors.

• If CB1 opens, remote devices using 115 volts from Remote 14 receptacle stop. Manually reset CB1.

• If CB2 opens, remote devices using 24 volts from Remote 14 receptacle stop. Manually reset CB2.

• If CB3 opens, devices connected to the 715 volt dupiex receptacle and remote devices using 115 volts from Remote 14 receptacle stop. Manually reset CB3.

• If F1 opens, the welding power source shuts down.

• Reed Relay (Ground Current Sensor - Optional)

1. Defects in external electrical circuitry may cause the ground wire to conduct welding current.

2. Relays CR1 and CR2 sense excessive current in the ground conductor and open the solid state contactor, shutting down weld output.

3. Open circuit voltage is not avail-able, but the fan motor FM runs and the pilot light PL1 stays on.

4. If the welding power source shuts down due to the ground current sensor, disconnect all power, and correct the problem before welding again.;