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| TROUBLESHOOTING GUIDE (con’t) | ||||
| PROBLEM |
| POSSIBLE CAUSE |
| CORRECTION |
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| 4. | No Power from | 4. | Check E15 to ground (See |
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| Control Board |
| page 14). |
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| I. | Control Panel | 1. | Control Panel Ribbon | 1. | Check control panel ribbon |
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| Keys Inoperative or |
| Cable Plugged in |
| cable (silver area on the ribbon |
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| Malfunctioning |
| Wrong |
| cable terminal should be |
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| facing away from the control |
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| board). Plug in correctly if |
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| 2. | Control Panel or Ribbon |
| Incorrect. |
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| 2. | Check E2 test points page 14. |
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| Cable Defective (Or) |
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| No Signal Read at |
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| Control Board. |
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| J. | LED’s Do Not | 1. | Unit Switched Off | 1. | Press unit On/Off key |
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| Illuminate. | 2. | LED Ribbon Cable | 2. | Check LED ribbon cable. Plug |
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| Plugged in Wrong. |
| in correctly if incorrect. |
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| 3. | No Data from Control | 3. | Replace control board. |
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| Board. |
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| K. All LED’s Stay | 1. | Bad Data from Control | 1. | Replace control board. |
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| Illuminated. |
| Board. |
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| L. | Same Segment(s) | 1. | Bad Data from Control | 1. | Replace control board. |
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| Missing From All |
| Board. |
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| Display Windows |
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| M. Segment(s) Miss- | 1. | Bad LED Board in | 1. | Replace control panel assembly. |
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| Ing From Only one |
| Control Panel. |
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| Display Window. |
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| N. Door or Unit | 1. | See Page 12 this Manual | 1. | See page 12 this manual. |
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