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When a contact is connected at DI 3, Al 3 is not available. Refer to AUX TEMP (Point15). DI 4 LOW TEMP DET 26 2299 Actual status of a contact connected to the controller. ON indicates that the contact is closed; OFF indicates that the contact is open. Actual status of the low temperature alarm, which is determined, by the current status of the low temperature detection thermostat. ON indicates that a low temperature has been detected. OFF indicates a normal condition. 26 2281, 2283, 2284, 2286,