DH-10 Heads & Controls OPERATOR'S MANUAL ... - Lincoln Electric

E-7PROBLEMS(SYMPTOMS)One of the knobs changes the display,but the other doesn’t.TROUBLESHOOTINGObserve all Safety Guidelines detailed throughout this manualPOSSIBLECAUSE1. The display is in a mode thatcan only use one encoder.2. The connector from the controlp.c. board to the encoder p.c.boards may be loose or improperlyinserted.3. Damaged encoder p.c. board.4. Damaged control p.c. board.RECOMMENDEDCOURSE OF ACTIONE-7Neither knob changes the display.1. Make sure that the DIP switcheson the control p.c. board are notset for high security mode.Displays & LED’s on keypad are off.The green and red LED’s on thecontrol p.c. board are off.2. The connector from the controlp.c. board to the encoder p.c.boards may be loose or improperlyinserted.3. Damaged control p.c. board.4. Damaged encoder p.c. boards.1. Power source is off.2. Power source supply is not supplying42 VAC to the wire feedercontrol box.3. Damaged input power wiring inthe DH-10 control box.4. Damaged control p.c. board.If all recommended possible areasof misadjustment have beenchecked and the problem persists,Contact your local LincolnAuthorized Field Service Facility.CAUTIONIf for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact yourLocal Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.DH-10