SERVICE (cont.)
DISPENSE VALVE
6. Connect the voltmeter lead ends to the dispense valve coil terminals. Connect the brewer to the power source. Brewer temperature lockout must be disabled. Place "ON/OFF" Switch in the "ON" position. Press and release the brew switch. The indication must be 120 volts ac.
7. Disconnect the brewer from the power source.
If voltage is present as described, but no coil action is observed, nor "clicking" heard, dispense valve is de- fective. Replace valve and test again to verify repair. If voltage is not present as described, refer to Wiring Diagrams and check the brewer wiring harness. Also check the control board for proper operation. See Pages 22 and 23.
| P1852 | Removal and Replacement: | |
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| FIG. 4 DISPENSE VALVE | 1. | Disconnect wires from the dispense valve. |
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| 2. | Drain enough water from the tank so the dispense |
Location: |
| valve is above the water level. | |
| The dispense valve is located inside the top cover | 3. | Remove water lines from the dispense valve. |
behind the front end cap. | 4. | Remove the two | |
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| valve to the sprayhead panel. |
Test Procedures: | 5. | Install a new dispense valve using the two | |
1. Disconnect the brewer from the power source. |
| nuts. | |
2. Check the water level in the tank to confirm that it | 6. | Reconnect water lines to the dispense valve and | |
| is within 1/2" from the top of the tank. |
| secure in place with clamps. |
3. Connect the brewer to the power source. If the | 7. | Refer to FIG. 5 when reconnecting wires. | |
| brewer has been set for brewer temperature lock- |
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| out, this feature must be disabled. See Page 9 for |
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| procedure. |
| WHI/GRN from |
4. | Check the dispense valve for coil action. Place the |
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| Control Board | ||
| ON/OFF switch in the "ON" position, press and |
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| release the BREW switch. Listen carefully in the |
| WHI from Terminal |
| vicinity of the dispense valve for a "clicking" sound |
| Block |
| as the coil magnet attracts and repels the plunger. |
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5. Disconnect the brewer from the power source. |
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If the sound is heard as described, there may be a |
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blockage in the dispense valve or the water line to the |
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sprayhead. Remove the dispense valve and inspect for |
| P1853 | |
wear, and remove waterborne particles. |
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| FIG. 5 DISPENSE VALVE WIRING | ||
If the sound is not heard as described, proceed to #6. |
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| Page 25 | 29707 112801 | |
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