Miller Electric D-74DX manual Diagnostics, There is a two-position DIP, Indicates a trigger, Error

Page 34

8-2. Diagnostics

3

1

2

1

LED3 On Right Side Motor

 

Control Board PC1

 

 

 

2

LED3 On Left Side Motor

 

 

Control Board PC101

 

3

LED4 On Dual Board PC70

.There is a two-position DIP

switch S1 located on motor con- trol boards PC1 and PC101. These switches are factory-set in the off position and must re- main in that position for the unit to operate correctly.

803 063-A

.Note: The error messages

are shown on the upper and lower displays to indi- cate specific errors. Ex- planations are in the text below:

Left Side Motor Control Board PC101

ERR

 

 

ERR

 

 

ERR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COM1

 

 

TRG1

 

 

TCH1

 

 

 

 

 

 

 

Indicates a com-

 

 

Indicates a trigger

 

Indicates a

munication error.

 

 

error.

 

tachometer error.

Right Side Motor Control Board PC1

 

 

 

 

 

ERR

 

 

ERR

 

 

ERR

 

 

 

 

 

 

 

 

 

 

 

 

 

COM2

 

 

TRG2

 

 

TCH2

 

 

 

 

 

 

 

Indicates a com-

 

 

Indicates a trigger

 

Indicates a

munication error.

 

 

error.

 

tachometer error.

Dual Board PC70

ERR

Indicates a

COM3 communicationerror.

ERR

MTR1

Indicates a motor error.

ERR

MTR2

Indicates a motor error.

LED3-Related Error Indications

Error conditions are indicated by LED3 on PC1, PC101, and LED4 on PC70. To view LED3, 4 turn Off unit, remove wrapper, and turn unit On.

The LED blinks in a 2.5 second cycle. The number of blinks in this period indicates the type of error.

The priority of the errors is related to the num- ber of blinks indicating the error. The more blinks, the more severe the error (motor error is top priority). A higher priority error overrides a lower one (if a motor error and a communica- tion error existed, the light would blink four times for the motor error).

Since blink On time and blink Off time are equal in a four-blink cycle, the four−blink se- quence appears as a constant blink.

1 blink = Communication Error

2 blinks = Trigger Error

3 blinks = Tach Error

4 blinks = Motor Error

•The communication error occurs 2.5 sec- onds after a loss of communication between the motor and the Front Panel board or Dual board. The user may continue to weld with this error.

•The trigger error occurs if the user has the trigger held for more than two minutes with- out striking an arc (providing current over- ride is not enabled), or if the user holds the trigger past the postflow phase in a timed weld. This error also occurs if the trigger is held when the feeder is powered up. The er- ror may be cleared by releasing the trigger.

•The tach error occurs 2 seconds after the loss of tachometer feedback. The user may continue to weld with this error. The motor speed is regulated through the monitoring of voltage and current.

•The motor error indicates that the motor has been drawing too much current for too long.

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Contents Description OM-1500-7 204 129HProcesses File MIG GmawFrom Miller to You Table of Contents Directives Decwire6/05Standards Electric Shock can kill Symbol UsageArc Welding Hazards HOT Parts can cause severe burnsWelding can cause fire or explosion Fumes and Gases can be hazardousARC Rays can burn eyes and skin Flying Metal or Dirt can injure eyesFalling Unit can cause injury Welding Wire can cause injuryFire or Explosion hazard Moving Parts can cause injuryEMF Information Principal Safety StandardsCalifornia Proposition 65 Warnings About Implanted Medical DevicesUNE Décharge Électrique peut entraîner la mort Symboles utilisésIndique des instructions spécifiques LES Fumées ET LES GAZ peuvent être dangereux DES Pièces Chaudes peuvent provoquer des brûlures gravesLE Soudage peut provoquer un in cendie ou une explosion Risque D’INCENDIE OU D’EXPLO- Sion LE Bruit peut endommager l’ouïeLES Bouteilles peuvent exploser si elles sont endommagées LA Chute DE L’APPAREIL peut blesserLES Fils DE Soudage peuvent provoquer des blessures Proposition californienne 65 AvertissementsLE Soudage À L’ARC risque de provoquer des interférences Information EMF Principales normes de sécuritéEn ce qui concerne les implants médicaux OM-1500-7 Drive rolls can injure fingers Disconnect input plug or power before working on machineKeep your head out of the fumes Rating Label For CE Products Symbols And DefinitionsSome symbols are found only on CE products Weee Label For Products Sold Within The EUSite Selection SpecificationsRating Shielding gas pressure not to Equipment Connection DiagramsExceed 100 PSI 689 kPa Rear Panel Connections And Rotating Drive Assembly Pin Plug Information Wire Type, Size, And Feed Speed Capability TableMotor Speed Wire Type Wire Size Feed Speed Capability Gun Recommendation TableInstalling And Threading Welding Wire Ment above.Cut wire off. Close coverWhen DIP switch positions are changed, Setting Internal DIP SwitchesDIP Switch S1 DIP Switch S4 Not For Customer Use Position Settings And Results For DIP Switch S1Power Source Selection Menu Left/Right Select Switch Power SwitchOperational Terms Jog/Purge Switch Front Panel Controls Wire SpeedTime sec Non-CE Models Program Push ButtonUpper Display CE ModelsSetup Push Button Lower DisplayTime Welding Sequence Diagram Adjust ControlSequence Push Button Sequence Push Button Setup Push ButtonAuxiliary Menus Upper DisplayTrigger Hold Setup Reset To Factory SettingsPower Source Selection Menu Wire Feed Speed UnitsSoftware Revision Level Display HoldCode Sequence Parameters In a Program Optional Dual Schedule Switch DiagramsFor more information on Sequence Push Button see Section LED3-Related Error Indications DiagnosticsError There is a two-position DIPRoutine Maintenance Diagnostics For User Defined OptionsMonths Trouble Remedy TroubleshootingDisconnect power before troubleshooting PullOM-1500-7 − Electrical Diagram 204 144-C − Parts List Part Description Quantity Control Box Harness Connectors/Receptacles PLG117 165See -1 For Drive Roll & Wire Guide Kits Hardware is common Not available unless listed21 . PC51,151 201 Roll Drive Drive Roll And Wire Guide Kits Fraction MetricKit Roll Wire Size Roll Drive KitYour distributor also gives ServiceSupport For assistance in filing or settling claims, contact To locate a Distributor or Service Agency visitMiller Electric Mfg. Co Your distributor and/or equipment manufacturer’s
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