Lincoln Electric 7FH manual Problems

Page 32

PROBLEMS

 

 

 

 

 

 

 

 

 

 

PROBLEM

 

 

POSSIBLE CAUSE

 

 

WHAT TO DO

 

 

 

 

 

 

 

 

 

 

 

9. Wire feed motor runs and

 

 

a. Power source is defective.

 

 

a. Disconnect input cable from

 

 

solenoid turns on but no arc

 

 

 

 

 

power source and place a jumper

 

 

voltage is present.

 

 

 

 

 

across sockets C & D of 14-

 

 

 

 

 

 

 

 

socket receptacle at power

 

 

 

 

 

 

 

 

source. If no arc voltage is

 

 

 

 

 

 

 

 

present then power source is

 

 

 

 

 

 

 

 

defective.

 

 

 

 

 

b. Input cable is defective.

 

 

b. Disconnect input cable from

 

 

 

 

 

 

 

 

power source and check

 

 

 

 

 

 

 

 

continuity between socket C of

 

 

 

 

 

 

 

 

8-socket plug and pin C of 14-pin

 

 

 

 

 

 

 

 

plug of the input cable and socket

 

 

 

 

 

 

 

 

D of 8-socket plug and pin D of

 

 

 

 

 

 

 

 

14-pin plug of the input cable.

 

 

 

 

 

 

 

 

Replace cable if no continuity.

 

 

 

 

 

c. Control PC Board is defective.

 

 

c. Replace Control PC board. (See

 

 

 

 

 

 

 

 

Procedure for Replacing PC

 

 

 

 

 

 

 

 

boards).

 

 

 

 

 

 

 

 

 

 

 

10. Speed does not change when

 

 

a. Run-In and weld speeds are set

 

 

a. Set Run-In and weld speeds to

 

 

weld current flows.

 

 

to the same value or Run-In is

 

 

desired settings.

 

 

 

 

 

set to - - -.

 

 

 

 

 

 

 

 

b. Power source may be defective

 

 

b. Check input control cable per

 

 

 

 

 

or there may be a control cable

 

 

problem 2e. If this is O.K. then

 

 

 

 

 

problem with the serial

 

 

replace Control PC board. (See

 

 

 

 

 

communications - see problem

 

 

Procedure for Replacing PC

 

 

 

 

 

2e.

 

 

boards.)

 

 

 

 

 

 

 

 

 

 

 

11. Voltmeter does not function or

 

 

a. See problem 2e, also 67

 

 

a. Check continuity from brass

 

 

read properly when arc voltage

 

 

electrode sensing lead or

 

 

block on wire feed unit to pin-F

 

 

is present.

 

 

connections may be intermittent.

 

 

on input connector at control box.

 

 

 

 

 

 

 

 

Otherwise, replace Control PC

 

 

 

 

 

 

 

 

board. (See Procedure for

 

 

 

 

 

 

 

 

Replacing PC Boards.)

 

 

 

 

 

 

 

 

 

 

 

12. Arrow keys do not change

 

 

a. This is normal as only WFS and

 

 

a. Refer to Operations Section of

 

 

WFS or Volts/Trim.

 

 

Volts/Trim knobs will adjust these

 

 

this manual.

 

 

 

 

 

settings.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13. Purge key does not turn on

 

 

a. Defective keypad or Display PC

 

 

a. Check continuity between

 

 

solenoid but trigger closure

 

 

Board is defective.

 

 

sockets 5 and 1 of keypad

 

 

does.

 

 

 

 

 

connector when purge key is

 

 

 

 

 

 

 

 

closed. If not, then replace

 

 

 

 

 

 

 

 

keypad, otherwise replace

 

 

 

 

 

 

 

 

Display PC board. (See

 

 

 

 

 

 

 

 

Procedure for Replacing PC

 

 

 

 

 

 

 

 

boards.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Contents Synergic 7F and Synergic 7FH ARC Welding can be hazardous Apr. ‘93Cylinder may explode if damaged Mar. ‘93Précautions DE Sûreté Sûreté Pour Soudage a L’ArcTable of Contents Please Examine Carton and Equipment For Damage Immediately Standard Features Wire Feed FeaturesGeneral Description Recommended Processes and EquipmentControl Features Causes mode lights to sequence Y P a D a N D D I S P L a Y DescriptionKeypad Seven key, membrane type with snap tactile feel Top to bottom starting fromOptional Features Drive Roll and Guide Tube KitsMiscellaneous Options Model Specifications for Synergic 7F Synergic 7FHType K678-1 K679-1 K679-2 Wire Speed Range Installation Safety PrecautionsProcedure to Install Drive Roll and Guide Tubes Wire Feed Drive Roll and Guide Tube KitsSteel Wire Sizes Roll Aluminum Wire SizesGun and Cable Assemblies with Standard L. E. Connections Gun Cable ConnectionGmaw Guns Innershield GunsGmaw Shielding Gas Gun Cable Connections Wire Feeder to GunSynergic 7F Water Connections for Water-Cooled Guns Electrical Installation Work CableCurrent 60% Duty Cycle Up to 100 ft Length 30mInstallation section for instructions Optional Features InstallationK648 or K649 Input Cable Assembly See Electrical Power-Down Save Operation Keys Mode SelectionOperating Instructions Current indicated positionDisplay Control Keys Run-In Selection Acceleration SelectionSelection of English or Metric Speed Display Units To Mount 10 to 44 lb 4.5-20kg Spool 12/300mm Diameter Step Trigger Mode SelectionFeeding Electrode and Brake Adjustment To Mount a 50-60lb 22.7-27.2kg Coil Feeding ElectrodeGas Guard Regulator Setting Optional K659-1 Wire Loading of 13-14lb 6kg Innershield CoilsIdle Roll Pressure Setting Making a Weld Wire Reel ChangingWire Feed Overload Protection Explanation of Prompting Error Messages Maintenance Routine MaintenanceWire Reel Mounting 50 22.7kg and 60lb 27.2kg Coils Avoiding Wire Feeding ProblemsTroubleshooting Guide Problems Communications in control cableProblems For continuity Refer to Wiring Wiring & connectionsWhen trigger is closed and no Gun connector Trigger sockets on gun connectorProblems Cold Feed key does not turn Defective keypad or Display PC Dual Procedure is not Gun has not been selected at With the remote switch open. If aFor replacing PC boards Problems with serial Troubleshooting information. SeeHXX Procedure for Replacing PC Boards Electric Shock can kill Switch RequirementsInside Input I NControl BOX Dimension Print Wire Feed Unit Dimension Print How To Read Shop Drawings New Lessons in Arc WeldingNeed Welding Training? $700.00Precaucion Warnung
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