Ranco Eco-Cool E71R/E72R Temperature and ... - icemeister.net

7 TROUBLESHOOTINGProblemThe red alarm LED remains illuminated after controller startup; acheck sum errorhas occurred.SolutionRe-install the firmware using EcoSoft Program (6.2.8) or a copy card (6.3.4).A temperature alarm occurs soon after startup. Increase the Temperature Alarm Disable Time after Start up (see 6.2.5.4).DRAFT VERSIONA temperature alarm occurs soon after defrost. Increase the Temperature Alarm Delay after Defrost (see 6.2.5.4).A high temperature alarm does not reset when the temperaturedecreases or a low temperature alarm does not reset when thetemperature increases.A temperature alarm occurs when the temperature is at thesetpoint.EcoSoft Program cannot communicate with the controller afterconnecting the interface box to your computer.The display shows E1.The display shows E2.Decrease the Temperature Alarm Differential (see 6.2.5.4).Adjust the temperature alarm setpoints (see 6.2.5.4).Check all cable connections:• Between controller and interface box• Between interface box and computer• Power supply cable to interface boxIf everything appears okay reboot the computer and start EcoSoft Program again.Check the control sensor, wires, and connectionsIf all connections appear okay replace the control sensor.Check the evaporator sensor, wires, and connections.If all connections appear okay replace the evaporator sensor.If no evaporator sensor is in use, disable the evaporator sensor (see 6.2.5.1).The evaporator sensor is not working properly. Make sure the controller is configured to use an evaporator sensor (see 6.2.5.1).Type E7 EcoCool Electronic Temperature and Defrost Controllers©2008 Invensys Controls All rights reserved.30