Miller Electric Intellifire 250 Maintenance & Troubleshooting, Routine Maintenance, Overheating

Page 15

SECTION 5 − MAINTENANCE & TROUBLESHOOTING

5-1. Routine Maintenance

			Y Disconnect power	. Maintain more often
			before maintaining.	during severe conditions.

3 Months

Clean and tighten output connections.

6 Months

Replace damaged or unreadable labels.

Repair or replace cracked cables and cords.

Blow out or vacuum inside.

5-2. Overheating

Thermostats TP1, TP2, and TP3 protect the unit from damage due to overheating. If one or more of the heat sinks get too hot, TP1, TP2, and/or TP3 opens and output stops. The fan keeps running to cool the heat sink(s). Wait several minutes before trying to heat.

5-3. Automatic Shutdown Protection

This unit automatically shuts down upon sensing certain fault conditions, such as an out-of-range frequency condition, short circuit load condition, or an open circuit (no load) condition. The unit also has automatic voltage limiting and power ratio limiting, which limits the output power based on improper load impedance.

5-4. Safety Interlock Switch

1

1Rear Panel

2Safety Interlock Switch

2The safety interlock switch prevents the contactor from energizing with the wrapper off the unit.

Tools Needed:

3/8 in

Ref. ST-801 826-C

OM-184 227 Page 11

Image 15

Contents Induction Heating Induction Heating Power SourceVisit our website at 2006−05From Miller to You Table of Contents Page Induction Heating Hazards − Safety Precautions − Read Before UsingSymbol Usage Marks a special safety messageFlying Metal or Adhesive can injure eyes Principal Safety StandardsUse only genuine Miller/Hobart replacement parts California Proposition 65 WarningsAbout Pacemakers EMF InformationAvertissement − Mesures DE Securite Pour LE Chauffage PAR InductionPorteurs de stimulateur cardiaque, restez à distance DES Organes Mobiles peuvent provoquer des blessuresEn ce qui concerne les stimulateurs cardiaques − Installation SpecificationsConnecting Head/Coil to Power Source Remote 14 Receptacle RC14 Information and Connections Remote 14 Socket InformationSocket Information Welding Power Source Input Power Connections Disconnect Device Input Power Connections= GND/PE Earth Ground Tools Needed 5/16 Controls Electrical Service GuideHz Three Phase − OperationOverheating − Maintenance & TroubleshootingRoutine Maintenance Safety Interlock SwitchMeasuring Tuning Capacitor Voltage Power Source Receptacle Plug Ground Fault ProtectionMeasuring Input Capacitor Voltage Diagnostic LED’s Troubleshooting Tuning ChartTrouble Remedy OM-184 227 Circuit Diagram − Electrical Diagram204 963-A Main Assembly − Parts ListFM2 Center Baffle Assembly -1 Item 180 Page Page Page Service Your distributor also givesSupport Transportation Department To locate a Distributor or Service Agency visitFor assistance in filing or settling claims, contact Your distributor and/or equipment manufacturer’s