TROUBLESHOOTING SECTION
WARNING: Inspection, testing and repair of electrical equipment should only be performed by a qualified service techni- cian. Many of the tests require that the unit have power to it and live electrical components be exposed.
USE EXTREME CAUTION WHEN TESTING THE MACHINE.
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| Symptom | Possible Cause | Action |
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| High wash tank temperature. | Defective thermostat. | If wash tank temperature is greater than 170 |
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| F (76.67 C), back thermostat CCW one full |
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| turn and restart unit. When cycle completes, |
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| set thermostat to 170 F (76.67 C) by turning |
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| CW. |
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| Leak in wash tank heating coil, allowing hot | Empty wash tank and observe coils with |
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| recirculating system water to enter tank. | recirculating system on. |
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| No Green LED flash and the recirculating | New control board placed into system and | Perform |
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| pump is running or the Green LED stays on, | not calibrated. |
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| but does not flash. |
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| Power to control board interrupted. | Check +12 VDC to control board (Voltage |
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| should be between 10.8 and 14.4 VDC). |
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| Make sure the transformer in main control |
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| box is energized. CAUTION: REVERSE |
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| POLARITY WILL DAMAGE THE CIRCUIT |
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| BOARDS. |
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| Circuit chip (microprocessor) pins not fully | Check for bent pins. Ensure chip fully |
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| inserted into its sockets. | inserted by gently pressing with thumb. |
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| Green LED flashes, but no ignition attempt | Check |
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| (no igniter, no gas). | be sensing | on control board. |
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| Ignition relay on control board inoperative. | Place finger on ignition relay and turn power |
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| on. Should hear or feel the relay actuating. |
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| If not, check circuit chip (microprocessor) |
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| fully inserted. If so, replace control board. |
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| Voltage not being sent from control board to | Check for 12 VDC at black wire going from |
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| DSI. | control board to DSI. Ensure green wire on |
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| DSI cable is grounded. |
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| Green LED flashes, but no ignition. (Igniter | ECO defective or not electrically connected. | Check blue wire from DSI connected to one |
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| sparks, no gas) |
| spade terminal of ECO and another blue |
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| wire connected from other spade terminal of |
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| ECO and to the combination gas cutoff |
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| valve. |
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