Miller Electric NT 450, NT 500 Voltmeter/Ammeter Help Displays, Help 3 Display, Help 7 Display

Page 29

6-3. Voltmeter/Ammeter Help Displays

V A

1 HE.L P−0

V A

2

HE.L P−2

V A

3

HE.L P−3

V A

4

HE.L P−4

V A

5

HE.L P−5

V A

6

HE.L P−6

V A

7

HE.L P−7

8

V

 

A

 

HE.L

 

P−9

 

 

 

 

.All directions are in reference to the front of the unit. All circuitry referred to is located inside the unit.

1 Help 0 Display

Indicates a shorted thermistor in the transformer of the unit. If this display is shown, contact a Factory Autho- rized Service Agent.

2 Help 2 Display

Indicates a malfunction in the thermal protection circuitry located on the transformer of the unit. If this display is shown, contact a Factory Authorized Service Agent.

3 Help 3 Display

Indicates the transformer of the unit has overheated. The unit has shut down to allow the fan to cool it (see Section 4-2). Operation will continue when the unit has cooled.

4 Help 4 Display

Indicates a malfunction in the thermal protection circuitry located on the secondary heat sink of the unit. If this dis- play is shown, contact a Factory Authorized Service Agent.

5 Help 5 Display

Indicates the secondary heat sink of the unit has over- heated. The unit has shut down to allow the fan to cool it (see Section 4-2). Operation will continue when the unit has cooled.

6 Help 6 Display

This is a two-stage error. The warning stage occurs when the primary voltage drops more than 12% below the linked primary voltage setting for more than 30 sec- onds. The display flashes a HELP 6 message during idle, but the welder continues to operate normally. Once the primary voltage returns to less than 10% below the linked primary voltage setting the flashing error ceases.

The shutdown stage occurs when the primary voltage drops more than 20% below the linked primary voltage setting for more than 30 seconds. A constant HELP 6 message is displayed, and weld output is disabled. Once the primary voltage returns to less than 10% below the linked primary voltage setting, the constant error mes- sage ceases, and weld output is enabled.

NOTE: Operating the welder out of the normal operating range (±12% of the linked primary) will affect the output and reliability of the welder, and is not recommended.

7 Help 7 Display

This is a two-stage error. The warning stage occurs when the primary voltage rises more than 12% above the linked primary voltage setting for more than 30 seconds. The display flashes a HELP 7 message during idle, but the welder continues to operate normally. Once the pri- mary voltage returns to less than 10% above the linked primary voltage setting the flashing error ceases.

The shutdown stage occurs when the primary voltage rises more than 20% above the linked primary voltage setting for more than 30 seconds. A constant HELP 7 message is displayed, and weld output is disabled. Once the primary voltage returns to less than 10% above the linked primary voltage setting the constant error message ceases, and weld output is enabled.

NOTE: Operating the welder out of the normal operating range (±12% of the linked primary) will affect the output and reliability of the welder, and is not recommended.

8 Help 9 Display

Indicates a shorted thermistor on the secondary heat sink of the unit. If this display is shown, contact a Factory Authorized Service Agent.

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Contents Processes OM-2252218 084RDescription File Multiprocess WeldingFrom Miller to You Table of Contents Page Arc Welding Hazards Symbol UsageElectric Shock can kill HOT Parts can cause severe burnsARC Rays can burn eyes and skin Fumes and Gases can be hazardousWelding can cause fire or explosion Flying Metal or Dirt can injure eyesFire or Explosion hazard Welding Wire can cause injuryFalling Unit can cause injury Moving Parts can cause injuryCalifornia Proposition 65 Warnings Principal Safety StandardsEMF Information About Implanted Medical DevicesUNE Décharge Électrique peut entraîner la mort Symboles utilisésLE Soudage peut provoquer un in cendie ou une explosion DES Pièces Chaudes peuvent provoquer des brûlures gravesLES Fumées ET LES GAZ peuvent être dangereux LES Bouteilles peuvent exploser si elles sont endommagées LE Bruit peut endommager l’ouïeRisque D’INCENDIE OU D’EXPLO- Sion LA Chute DE L’APPAREIL peut blesserLE Soudage À L’ARC risque de provoquer des interférences Proposition californienne 65 AvertissementsLES Fils DE Soudage peuvent provoquer des blessures En ce qui concerne les implants médicaux Principales normes de sécuritéInformation EMF OM-2252 − Definitions General Precautionary LabelInput Connection Label Nameplate Safety SymbolsElectric Shock And Airflow Label ? aDuty Cycle And Overheating − InstallationSpecifications CV Mode CC ModeVolt-Ampere Curves 100 200 300 400 500 600Movement Selecting a Location460 mm 460 mm OM-2252Dimensions Dimensions And WeightsWeight 376 lb 171 kg Holes EFrontTurn Off power before connecting to receptacle Do not move or operate unit where it could tipTipping VAC Receptacle And Circuit BreakersWeld Output Terminals And Selecting Cable Sizes Connecting Weld Output CablesTurn off power before con Connecting Remote ControlRemote 14 Receptacle Information SocketPlacing Jumper Links Electrical Service GuideWelding Power Source Input Power Connections Connecting Input PowerDisconnect Device Input Power Connec- tions = GND/PE Earth GroundControls − OperationMeter Functions For CC/CV Models Lift-Arc TIG Procedure For CC/CV ModelsRoutine Maintenance − Maintenance & TroubleshootingDisconnect power before maintaining Disconnect input power be- fore opening rear access doorHelp 7 Display Voltmeter/Ammeter Help DisplaysHelp 3 Display Trouble Remedy TroubleshootingWork like a Pro Circuit Diagram For Dimension NT − Electrical Diagram218 081-F Main Assembly − Parts ListTHERMISTOR, NTC 10K OHM @ 25 DEG C 34IN Lead 264 Panel, Front With ComponentsPanel, Front With Components -1Item IGBT/Capacitor Assembly 221 IGBT/Capacitor Assembly -1itemPanel, Rear With Components Page Work like a Pro Support ServiceYour distributor also gives Miller Electric Mfg. Co To locate a Distributor or Service Agency visitFor assistance in filing or settling claims, contact Your distributor and/or equipment manufacturer’s
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