OPERATION (continued)
642 75872 Owners Manual E.B.C. Airpot /Thermal
Quality Timer
Coffee looses its freshness as it sits on a warmer. The Quality Timer flashes the warmer lights 30 minutes after the last brew to remind you that the coffee is nearing the end of its useful life.
After Hours™ Operation
During normal operation, the controller will maintain the precise brewing temperature. If, however, if the BREW key in not pressed for
3 hours, the brewer goes into After Hours™ mode; any warmer left on will be turned off; and, the temperature will only be maintained to within 20ºF. This feature prolongs component life and saves energy.
As soon as the BREW key is pressed, the brewer returns to normal operation, heating the water to the precise temperature before beginning the brew. The brewer will return to After Hours™ mode only if three hours pass without a brew being initiated.
Disable/Enable After Hours™ Feature
To disable After Hours™, press the ON/OFF key to turn the brewer OFF. Press and hold the CANCEL key until two beeps sound, and the HEAT indicator flashes twice. This feature is now disabled.
To
Over-Temperature and Temperature Fault Protection
Should the water temperature exceed 214ºF (101ºC), or if the controller does not detect a 2ºF (1ºC) rise in temperature within four minutes of calling for heat, the brewer will go into Over Temperature Mode; the heating element is turned off, all warmers are disabled and all lights will flash.
Possible causes of Over Temperature condition:
•Setpoint is in the boiling range.
•Heating element or temperature probe has malfunctioned.
•Excessive scale buildup is preventing the element from heating the water.
•Heating element relay fails in the “on” state.
•No water in the tank.
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To reset the brewer:
•Determine the cause of the failure and take appropriate remedial action to rectify the problem.
•Press and hold the CANCEL key for three seconds. Four beeps will sound and the brewer will resume normal operation.
Quality Timer is normally set for 30 minutes. It can be set for 20 minutes by moving a jumper on the controller. See page 19.
After Hours™ is an energy saving feature. The brewer will enter After Hours™ mode if it is not used for three hours. Press the BREW key to immediately return the brewer to normal operation.
IMPORTANT:
If the original cause of the problem has not been addressed, the brewer will once again go into Over Temperature mode four minutes after being reset.
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