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Accu EQ Series Installation, Operation And Maintenance Manual
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7Once proper flow and temperature are achieved, press the Stop button. The unit is now ready to be placed into service.Controller OperationThe chiller includes a microprocessor controller designed toperform all control functions directly from the front panel. When abutton is depressed, a click will be felt and the corresponding LEDwill be energized. Only one button should be pressed at a time.Table 5 shows the basic control fault logic for the microprocessorcontroller.Table 5 - Microprocessor Control Fault LogicFault AlarmIndicationCompressorShutdownPumpShut OffAlarmResetRequired1ManualResetRequired2RemoteAlarmActivated3No Flow LED Yes Yes No No YesHigh Refrigerant Pressure LED Yes Yes Yes No YesLow Refrigerant Pressure LED Yes No Yes No YesFreezestat LED Yes No Yes Yes YesLow Oil Pressure LED Yes Yes Yes Yes YesOver Set Point LED No No No No YesUnder Set Point LED Yes No Yes No YesLow Water Level LED No No No No NoHigh Water Temperature LED No No No No NoProbe Fault LED Yes Yes Yes No YesLow Power Pr OFF Yes Yes Yes No YesPump Overload Err 126 Yes Yes Yes Yes YesCompressor Overload Err 127 Yes Yes Yes No YesHigh Temperature Safety Err 128 Yes Yes Yes No Yes1 Alarm Reset button or Stop button on control panel must be pressed.2 Safety control must be manually reset before the controller can be reset.3 Activates the alarm horn (if included) and closes the alarm contact (if included). |
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