Miller Electric 75 manual Troubleshooting, RMD done message indicates, Unknown, Trouble Remedy

Page 35

7-2. Diagnostics (Continued)

 

RMD

 

 

OVER

 

 

UNIT

 

 

 

REL

 

 

TRIG

 

 

ERR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TRIG

 

 

STUK

 

 

UNKN

 

 

DONE

 

 

AVER

 

 

COMM

 

 

 

 

 

 

 

 

 

 

 

 

Indicates a contactor

Indicates a trigger

Indicates an

 

Indicates RMD

Indicates an over

 

Indicates a CRC

 

 

demo is done.

average current error.

 

PCM bus error.

 

on error.

closed error.

unknown error.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RMD DONE

 

 

 

 

UNIT COMM

 

 

 

TRIG STUK

 

 

 

• The RMD done message indicates the

• The unit communication error indicates

 

 

 

 

 

 

 

RMD demo is completed. Pressing

• The trigger stuck error indicates the user

 

the data bus on the PCM board is not

 

Jog/Purge button will change the screen to

functioning properly. Press Jog/Purge

 

held the gun trigger during power up. Press

 

CYCL PWR on the display. Turn unit power

 

 

button to clear error.

 

 

 

 

Jog/Purge button to clear error.

 

off and back on again.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OVER AVER

 

 

 

 

REL TRIG

 

 

 

ERR UNKN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• The over average error indicates that

• The release trigger error indicates the

 

 

 

 

 

 

 

 

 

 

current is outside the average range for the

user held the gun trigger after a timed weld

• The unknown

error indicates a

 

set program parameters. Check and correct

was completed causing the contactor to

 

program parameters. Press Jog/Purge

remain on. Press Jog/Purge button to clear

 

malfunction in the system somewhere.

 

button to clear error.

 

 

 

 

error.

 

 

 

 

Press Jog/Purge button to clear error.

7-3. Troubleshooting

 

Y Disconnect power before troubleshooting

Trouble

Remedy

Wire feeds, shielding gas flows, but

Check and secure weld cable connections (see Section 4-2).

electrode wire is not energized.

 

Electrode wire feeding stops or feeds

Check gun trigger connection. See gun Owner’s Manual.

erratically during welding.

Check gun trigger. See gun Owner’s Manual.

 

 

Readjust hub tension and drive roll pressure (see Section 4-9).

 

Change to correct size drive roll (see Table 9-1).

 

Clean or replace dirty or worn drive roll.

 

Incorrect size or worn wire guides.

 

Replace contact tip or liner. See gun Owner’s Manual.

 

Remove weld spatter or foreign matter from around nozzle opening.

 

Have Factory Authorized Service Agency check drive motor or motor control board PC1.

Motor runs slowly.

Check for correct input voltage.

Wire feeder power is on, displays light

Check welding gun trigger leads for continuity, and repair leads or replace gun.

up, but unit is inoperative.

 

OM-228 956 Page 31

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Contents File Advanced Manufacturing Systems OM-228 956BProcesses DescriptionFrom Miller to You Table of Contents Page Electric Shock can kill Symbol UsageMarks a special safety message Arc Welding HazardsBuildup of GAS can injure or kill ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal can injure eyesCalifornia Proposition 65 Warnings About Pacemakers Principal Safety StandardsEMF Information Indique un message de sécurité particulier UNE Décharge Électrique peut entraîner la mortLES Fumées ET LES GAZ peuvent être dangereux DES Pièces Chaudes peuvent provoquer des brûlures graves LE Soudage peut provoquer unIncendie ou une explosion DES Particules Volantes peuvent blesser les yeuxDES Organes Mobiles peuvent provoquer des blessures Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser ’EMPLOI Excessif peut SUREn ce qui concerne les stimulateurs cardiaques Principales normes de sécuritéSelecting a Location − InstallationSpecifications − IntroductionConnection Diagram Tools Needed 9/16, 5/8 Rear Panel Connections And Rotating Drive AssemblyRemoval Installing Drive RollsInstallation Pin Network Receptacle InformationInstalling PD continuous wire guides with PD drive rolls Installing PD Continuous Wire GuidesTools Needed 16, 1/8, 5/32 Installing Non-PD Old Style Wire GuidesInstalling wire guides with non- PD old-style drive rolls Rotate guide holder 180 degrees and reinstallInstalling gun without Accu- Mate connection Installing Welding GunInstalling gun with Accu-Mate connection Secure gun by tightening power clamp knobEnd Of Liner No Wire SlipWire Slips Upper Display Lower Display Feeder Display At Power UpDual Schedule Switch Options Power Source Upper Display Lower Display Voltage RangeOperational Terms − OperationPostflow Power SwitchFeeder Set Up General Terms CraterSection See Section Program Volts Time Arc AdjustFront Panel Controls SeeUpper Display Volts Arc AdjustProgram Push Button Upper DisplayLower Display Sequence Trigger Control Trigger Hold Feeder Set Up Feeder Set Up Push ButtonAdjust Control Make a selection, rotate the Adjust control Process Set Up Push ButtonJog/Purge Jog/Purge Push Button Adjust Control Gun Trigger ReceptacleWelding and to preset gas pressure at the regulator Accu-pulse Reset ModePulse Mild SteelSequence Parameters − Setting Sequence ParametersSequence Parameters In a Program = Check = Change ~ = Clean = Replace − MaintenanceRoutine Maintenance Disconnect power before maintainingIndicates a voltage Sense error DiagnosticsIndicates a memory CRC PCM error Indicates a line errorIndicates an arc error Indicates a polarity errorUnknown TroubleshootingDisconnect power before troubleshooting RMD done message indicatesCircuit Diagram − Electrical Diagram211 005-D − -3 21 − Fig − Parts ListFigures 9-3 Control Box PLG4 Drive Assembly, Wire 9-1Item Drive Assembly, WireDrive Assembly, Wire -1Item Wire Size Page Page Support ServiceYour distributor also gives Your distributor and/or equipment manufacturer’s To locate a Distributor or Service Agency visitMiller Electric Mfg. Co For assistance in filing or settling claims, contact
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