PROBLEMS
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| PROBLEM |
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| POSSIBLE CAUSE |
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| WHAT TO DO |
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| 14. Cold Feed key does not turn |
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| a. Defective keypad or Display PC |
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| a. Check continuity between sockets 4 |
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| on wire feed motor but trigger |
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| board is defective. |
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| and 1 of keypad connector when |
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| closure does. |
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| Cold Feed key is closed. If not, |
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| then replace keypad, otherwise, |
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| replace Display PC board. (See |
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| Procedure for Replacing PC |
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| boards). |
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| 15. Display and/or indicator lights |
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| \a. Defective keypad or Display PC |
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| a. Ring out keypad. Replace if |
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| do not change when the arrow |
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| board. |
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| defective. If not, then replace |
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| or select keys are pressed. |
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| Display PC board. (See Procedure |
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| for Replacing PC boards.) |
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| 16. Display does not change when |
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| a. Make sure that the function |
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| a. Press the function key to light the |
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| WFS and/or Volts/Trim knobs |
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| select key has been pressed to |
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| LED next to the display function that |
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| are turned. |
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| light the LED corresponding to |
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| corresponds with the knob to be |
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| the Volts/Trim or WFS display |
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| adjusted. |
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| depending on which knob you |
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| are attempting to adjust. |
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| b. Broken harness wire(s) or |
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| b. Check harness connections to |
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| harness disconnected from |
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| encoder and control boards and |
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| encoder boards(s) or control |
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| continuity between corresponding |
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| board. |
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| harness leads in P2 and P17. |
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| (Refer to wiring diagram). |
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| c. Defective Encoder boards and/or |
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| c. If b. is not the problem and neither |
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| control board. |
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| the WFS or Volts/Trim knobs are |
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| properly adjusting then replace the |
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| control board. If one of the two |
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| knobs are properly adjusting, plug |
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| the P17 harness from the working |
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| board into the nonfunctional board. |
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| If the previously nonfunctional board |
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| is now working, replace the control |
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| board. Otherwise replace the |
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| nonfunctional encoder board. (See |
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| procedure for replacing PC boards). |
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| 17. Display is blank. |
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| a. Power source is OFF. |
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| a. Turn ON power source. |
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| b. Feeder supply fuse or circuit |
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| b. Check input cable and feeder unit |
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| breaker at power source is blown |
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| for short in 41 and 42 circuit. Check |
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| or tripped. |
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| for shorted motor. Replace fuse or |
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| reset circuit breaker. |
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| c. Display or Control PC board is |
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| c. Observe LED mounted on Control |
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| bad. |
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| PC board. It should blink on and off |
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| at a controlled rate of 1 second ON |
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| and 1 second OFF. If so, then |
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| replace Display PC board. If not, |
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| replace Control PC board. (See |
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| Procedure for Replacing PC |
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| boards.) |
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– 33 –
