Miller Electric OM-842 manual Diagnostics Program, Programming Push Button Tests, RAM Test

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7-2. Diagnostics Program

When the diagnostics program starts, the following series of in- formational displays is shown:

B.Programming Push Button Tests

1.After the RAM test is passed, the front panel program- ming push button tests are carried out. The display shows:

* S Y N C R O W A V E 3 5 1 *

D I A G N O S T I C P R O G R A M

T H E F O L L O W I N G

P R O G R A M W I L L C H E C K

Y O U R U N I T T O V E R I F Y T H A T I T I S

F U N C T I O N I N G

P R O P E R L Y

A.RAM Test

1.After the four informational displays are shown, the in- ternal RAM (random access memory) of the microprocessor control is tested to make sure each memory location is working properly. If the RAM tests okay, the display shows:

R A M I S W O R K I N G

P R O P E R L Y

If the RAM tests okay, go to Step 3.

2.If the RAM does not test okay, the following displays appear:

E R R O R ! ! ! R A M I S

N O T W O R K I N G P R O P E R L Y

P L E A S E R E P L A C E R A M B E F O R E C O N T I N U I N G

W I T H T H E D I A G N O S T I C T E S T P R O G R A M

If the RAM does not test okay, contact the nearest Fac- tory Authorized Service Station/Service Distributor.

3.When the RAM tests okay, the diagnostics program proceeds to the next test.

P L E A S E P U S H

R I G H T / I N C B U T T O N

2.When this display appears, the control unit waits nine seconds for the Right/Increase push button to be pressed. If this is done in time and the push button is working properly, the display shows:

R I G H T / I N C B U T T O N I S

W O R K I N G P R O P E R L Y

If the Right/Increase push button tests okay, go to Step 4.

3.If the Right/Increase push button is not pressed in time, or if the push button is not working correctly, the follow- ing displays appear:

E R R O R R I G H T B U T T O N I S N O T W O R K I N G

P L E A S E C O R R E C T E R R O R B E F O R E C O N T I N U I N G

W I T H T H E D I A G N O S T I C T E S T P R O G R A M

If the Right/Increase push button is not working correct- ly, replace the push button.

4.When the Right/Increase push button tests okay, the diagnostics program tests the Left/Decrease push but- ton. The display shows:

P

L

E A S E

P U S H

L E F T

/ D E C

B U T T O N

 

 

 

 

5.When this display appears, the control unit waits nine seconds for the Left/Decrease push button to be pressed. If this is done in time and the push button is working correctly, the display shows:

L E F T / D E C B U T T O N I S

W O R K I N G P R O P E R L Y

If the Left/Decrease push button tests okay, go to Step 7.

OM-842 Page 39

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Contents Processes OM-842162074BDescription From 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 eyesPrincipal Safety Standards About Pacemakers EMF InformationLES Fumé ES ET LES GAZ peuvent ê tre dangereux Signification des symbolesConsignes DE Securite Lire Avant Utilisation UN Choc É Lectrique peut tuerDES Particules Volantes peuvent blesser les yeux LE Soudage peut provoquer un incendie ou une explosionLE Bruit peut affecter l’ouïe DES Organes Mobiles peuvent provoquer des blessures Risque D’INCENDIE OULA Chute DE L’APPAREIL peut blesser ’EMPLOI Excessif peutInformation sur les champs é lectromagné tiques Principales normes de sé curitéConsignes relatives aux stimulateurs cardiaques Connecting Remote Pendant Or Equivalent User-Wired Control InstallationRemote 4 Socket Information User Relay Contacts Pulse signal, and for a wire feederRocker Switch Settings = On = Off Setting DIP Switch SW1Work Clamp Safety EquipmentOperation ControlsAmmeter And Voltmeter Mode Selector SwitchDigital Display Left/Decrease Push Button Program/Run/Reset Keyed SwitchParameter Select Push Button Right/Increase Push ButtonRemote Pendant Purge Push ButtonShielding Gas Balance Control Introduction to ProgrammingGeneral Weld SequenceStart Level Not Shown Time & level programmed Automatic Mode SequenceSemi-Automatic Mode Sequence Modes Of OperationInitial Current C Final Slope Current B Current D Preflow Weld/PeakWeld/Peak Initial Current C Final SlopeSlope Current B Weld/Peak Initial C Current D Final SlopeSlope Current B Semi-Automatic 4 Mode SequenceInitial Slope Weld/Peak Current Final Slope Final Current Smaw ModeWeld/Peak Initial Current B Final Slope Slope Preflow PostflowProgramming Procedure Up To Pulse Mode Selection Automatic ModeProcedure With Pulse Mode On, Pulses Defined In Time Values S T F L O W Procedure With Pulse Mode On, Pulses Defined As a FrequencyProcedure Following Pulse Mode Definition N a LE R E M O T E T O A R T Semi-Automatic ModeA R T O P# 0 X I N I T I a L P S = X X X Procedure With Pulse Mode On, Pulses Defined As a Frequency X X X X X X X O P B U T T O N D E T E C TManual Gtaw Mode X X X X R R E N T C O N T R O LEditing a Program Smaw Mode# 0 X a R C C O N T R O L R C E N T a G E = 0 0 0 % N K P O S I T I O N X X X X X X X Dry Run FeatureStop Watch Feature Linking ProgramsM B I N E P O S I T I O N X X I S X X X X X X Combining ProgramsM B I N E M O D E O G R a M L I N K M O D EGas Tungsten Arc Welding Gtaw In The Semi-Automatic Modes Gas Tungsten Arc Welding Gtaw In The Automatic ModeShared Initial Procedure Sequence of OperationOperation Procedures For Semi-Automatic 4 Mode Operation Procedures For Semi-Automatic 1 ModeOperation Procedures For Semi-Automatic 2 Mode Operation Procedures For Semi-Automatic 3 ModeOperation Procedures For Semi-Automatic 5 Mode Gas Tungsten Arc Welding Gtaw In The Manual ModeShutting Down Shielded Metal Arc Welding SmawExecuting Linked Programs Executing Combined ProgramsOverheating Protection DiagnosticsIntroduction Programming Push Button Tests Diagnostics ProgramRAM Test Repeating Test Displays Program/Run/Reset Keyed Switch TestsMode Selector Switch Test Output Selector Switch TestR G E B U T T O N S T W O R K I N G O P E R L YE a S E T U R N K N O B T O Purge Push Button Test+10 Volt DC Reference Test User Relays Background Relay TestArc Starter Relay Test Gas Solenoid Relay TestS H D E C R E a S E B U T T O N R E M O T E Remote Pendant TestM O T E P E N D a N T S T R E M O T EInput Contactor Test Current Detect TestP U T C O N T a C T O R I S T D E T E C T E D P U T C O N T a C T O R D E T E C T E DCircuit Diagram For Remote Pendant Electrical DiagramsWiring Diagram For MPC Module Circuit Diagram For Welding Power Source And MPC SC-182 947-B Main Assembly Parts List110 Dia Part Mkgs Description QuantityNAMEPLATE, order by model and serial number 158 078 010132 Page Page Page Page Support ServiceDistributor Address City State Zip Model Name Serial/Style Number Purchase DateMiller Electric Mfg. Co

OM-842 specifications

The Miller Electric OM-842 is a versatile and powerful multi-process welding machine designed for professional welders who demand efficiency and reliability on the job. This industrial-grade welder is capable of handling various welding processes, including MIG, TIG, stick, and flux-cored welding, making it an ideal choice for a wide range of applications.

One of the standout features of the OM-842 is its robust output capability. With a maximum output of 400 amps, it can tackle thick materials with ease while maintaining exceptional arc stability. This output range allows for adaptability in different welding scenarios, whether working on heavy fabrication projects or lighter home repairs.

The OM-842 is also equipped with advanced inverter technology. This technology enhances the machine's efficiency and reduces energy consumption. Inverter machines are known for their lightweight design compared to traditional transformer welders, which makes the OM-842 more portable and easier to transport between job sites.

User-friendliness is paramount in the design of the OM-842. Its intuitive control panel features a digital display that provides real-time information on parameters such as voltage and amperage. This allows users to make quick and precise adjustments on the fly, enhancing productivity and ensuring optimal welding results.

Additionally, the OM-842 offers sophisticated weld control features, such as Auto-Set, which simplifies the setup process for beginners and experienced users alike. This technology automatically selects optimal parameters based on the material type and thickness, minimizing trial and error during welding.

The machine also includes a durable and rugged design, suitable for tough working conditions. The protective case and high-quality components ensure longevity and reliability even in adverse environments.

Safety is another critical aspect of the OM-842, with features such as over-temperature protection and a built-in fan to prevent overheating during extended use.

With its powerful performance, advanced technology, and robust design, the Miller Electric OM-842 stands out as an exceptional choice for welders seeking reliability and versatility in their welding operations, ultimately creating high-quality welds across various applications. Whether in a shop or on a construction site, the OM-842 is engineered to deliver outstanding results every time.
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