Lincoln Electric SVM169-A service manual Safety Precautions, Select Suitable Location

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A-4

INSTALLATION

A-4

SAFETY PRECAUTIONS

 

 

 

 

 

WARNING

 

Read entire installation section before starting

 

 

• Use only Lincoln provided

 

installation.

 

 

 

 

T4550-5 1/2-13 x 1.00 eyebolt.

 

 

 

 

 

 

• Fully engage threads and

 

 

WARNING

 

 

 

 

 

 

 

 

torque eyebolt to 38 ft. lbs.

 

 

 

 

 

 

• Re-torque eyebolt to 38 ft. lbs.

 

ELECTRIC SHOCK can kill.

 

 

 

 

 

before each lift.

 

•

Only qualified personnel should

 

 

 

 

 

• Lift only with equipment of

 

 

perform this installation.

 

 

 

•

Turn the input power OFF at the

 

 

adequate lifting capacity.

 

 

FALLING

• Never lift welder with gas

 

 

disconnect switch or fuse box

 

 

 

before working on this equipment.

EQUIPMENT

cylinder attached.

• Do not touch electrically hot

cause injury.

• Never lift welder above per-

parts.

 

 

 

 

sonnel.

• Always connect the SQUARE WAVE TIG 175 PRO

• Lift only with equipment of adequate lifting

to a power supply grounded per the National

• Be sure machine is stable when lifting.

Electrical Code and any local codes.

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SELECT SUITABLE LOCATION

Place the welder where clean cooling air can freely cir- culate in and out through the rear louvers. Dirt, dust or any foreign material that can be drawn into the welder should be kept at a minimum. Failure to observe these precautions can result in excessive operating temper- atures and nuisance shut-downs.

An undercarriage, provided on the Ready-Pak w/Cart model, is also available to easily move the the unit. Refer to the Accessories section of this manual.

Do not attempt to lift the power source with an undercarriage attached.

The undercarriage is designed for hand moving only; mechanized movement can lead to personal injury and/or damage to the Precision TIG 185.

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GRINDING

TILTING

 

Do not direct grinding particles towards the welder. An

Each machine must be placed on a secure, level sur-

face, either directly or on a recommended undercar-

abundance of conductive material can cause mainte-

riage. The machine may topple over if this procedure is

nance problems.

not followed.

 

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STACKING

Square Wave TIG 185 cannot be stacked.

LIFTING AND MOVING

The Precision TIG 185 models are provided with an Eyebolt used for lifting the unit with a hoist. To install; remove the plug button from the case top and screw the Eyebolt securely into the threaded bracket beneath the case top per the below instructions and warnings provided on the case top decal. Save the removed plug button (LE part No.T10397-2) to cover the hole when the lift Eyebolt is removed.

ENVIRONMENTAL RATING

The PRECISION TIG 185 power source carries an IP21 environmental rating. It may be used in normal industrial and commercial environments. Avoid using it in environments which have falling water such as rain.

Read and follow “Electric Shock Warnings” in the Safety section if welding must be performed under electrically hazardous conditions such as welding in wet areas or on or in the workpiece.

MACHINE GROUNDING AND HIGH FRE- QUENCY INTERFERENCE PROTECTION

This welder must be grounded! See your local and national electrical codes for proper grounding methods.

PRECISION TIG 185

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Contents Precision TIG Safety Electric Shock can kill Safety Welding Sparks can cause fire or explosionPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation SectionInstallation Input Single Phase onlyModel Height Width Depth Weight K2345-2 Input at Rated OutputSafety Precautions Select Suitable LocationInput Connections Connections for TIG Gtaw Welding Input Reconnect ProcedureOutput Connections TIG Torch ConnectionWork Cable Connection Remote Control ConnectionShielding GAS Connection Precision TIG Operation Section Section BOperation Product Description Recommended Processes and EquipmentControls and Settings Control FunctionalityOperating Steps Welding in TIG ModePulse TIG Control Remote Control Operation Benefits of the Precision TIG 185 DesignWelding in Stick Mode Recommended Electrode Amperage Ranges Precision TIGPrecision TIG Accessories Section Factory Installed Options AccessoriesTable C.1 Field Installed Options K2348-1 Under-Storage CartPrecision TIG Maintenance Section Section DRoutine and Periodic Maintenance MaintenanceSpark GAP Adjustment Figure D.2 Location of Maintenance Components Return to Section TOC Theory of Operation Section Section ETheory of Operation Input Power CircuitGeneral Description Output Rectification Feedback Control Figure E.3 Control Board and Output Feedback ControlHigh Voltage / High Frequency Circuit Figure E.4 High Voltage/High Frequency CircuitDC Welding Output Figure E.5 DC Welding Current GenerationAC Welding Output Figure E.6 AC Square Wave Welding Current GenerationSCR Operation Figure E.7 SCR OperationThermal Protection Protective CircuitsOverload Protection Troubleshooting & Repair Section Section FTroubleshooting & Repair High Voltage / High Frequency can damage test equipmentPC Board Troubleshooting Procedures WorkstationsProblems Possible Areas Recommended Symptoms Course of ActionPossible Areas Recommended Symptoms Problems Possible Areas Check the welding cables and or TIG Mode Problems Troubleshooting & Repair TIG Welding Problems Problems Possible Areas Electric Shock can Problems Possible Areas Recommended Symptoms Stick Welding Problems High Frequency Circuit Disable Procedure Test DescriptionProcedure Figure F.1 Spark GAP AssemblyT1 Transformer Test Test Procedure T1 Transformer TestReturn to Section Section TOC Primary Windings Primary VoltagesPrecision TIG Static SCR Test Static SCR Test Assembly Removal and Replacement Precision TIG Active SCR Test Active SCR Test Figure F.6 SCR Gate Locations Precision TIG Scope Settings AC TIG ModeNormal Open Circuit Voltage Waveform DC TIG Mode AC Stick Mode DC Stick Mode Typical Output Voltage Waveform Machine Loaded Machine Loaded to 180 Amps AT 16VDCDC TIG Mode Machine Loaded to 180 Amps AT 26VDC DC Stick Mode 50 V/Div Precision TIG Troubleshooting and Repair SCR Bridge Assembly Removal and Replacement ProcedureSCR Bridge Assembly ProcedureFront Panel Mounting Screws 42TROUBLESHOOTING & REPAIRF-42 Figure F.9 Plug J2 on Control Board43TROUBLESHOOTING & REPAIRF-43 Replacement ProcedurePrecision TIG Polarity Switch Removal and Replacement Procedure Polarity Switch Removal ProcedureReplacement Procedure Precision TIG High Voltage Transformer Removal and Replacement Procedure High Voltage Transformer Transformer Secondary Leads Precision TIGFigure F.12 High Voltage Transformer Mounting Insulators Precision TIG Nutdriver Wrench Wire cutters Perform the SCR Bridge Assembly Removal Procedure Assembly Replacement Procedure Precision TIG Input Idle Amps Troubleshooting and RepairRetest After Repair Recommended Meters for Machine Output TestsPrecision TIG Electrical Diagrams Section Wiring Diagram Entire Machine G4549 Precision TIGSchematic Entire Machine G4588 G4588Schematic Control PC Board G4550-1B4-1 Schematic Control P.C. Board G4550-1B4-2 Schematic Control P.C. Board G4550-1B4-3 PC Board Assembly Control G4551-1 G4551SVM Error Reporting Form
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