Problem ResolutionController cannot find softwareupdates on the SD card.Make sure an appropriate folder is created byinstalling the SD card in the sc200. An updatefolder will automatically be created.Install the SD card on a PC and make sure thesoftware files are located in the appropriateupdate folder.If the same SD card is used with multiplecontrollers, each controller will have a separatefolder on the system. Make sure the softwareupdates are in the folder dedicated to thecontroller in use.Display is lit but shows nocharacters or characters are faintor blurry.Adjust the display contrastMake sure protective film has been removedfrom display.Clean the outside of the controller, includingthe display screen.Controller will not power up, orpowers up intermittentlyMake sure the AC power connections areproperly terminated in the controller.Make sure the power strip, line power, wall plugare all properly plugged in.Contact Hach Technical SupportNetwork or sensor module notrecognizedMake sure the module is properly installed.Make sure the module selector switch is set tothe proper number.Remove sensor module and install the moduleinto the second analog slot. Apply power to thecontroller and allow the controller to perform adevice scan.Contact Hach Technical Support.Problem ResolutionSensor not recognizedIf the sensor is an analog sensor and acorresponding module is installed in thecontroller, refer to the instructions supplied withthe Network or Sensor Module.Make sure the digital connector wiring harnessis seated on the inside of the door assemblyand that the wiring harness is not damaged.If the digital sensor is connected to thecontroller with a digital termination box, usersupplied junction box, digital extension cables,or a user-supplied extension cable, connectthe sensor directly to the controller and performa device scan. If the controller recognizes thesensor, check that all the wiring in the junctionboxes or extension cables is correct.Make sure that only two sensors are installedin the controller. Although two analog moduleports are available, if a digital sensor and twoanalog modules are installed, only two of thethree devices will be seen by the controller.Contact Hach Technical SupportDevice Missing error messageappearsPerform a Device Scan from the Test/Maintenance menu.Power cycle the controllerTest and Maintenance menu1. From the Settings Menu, select Test/Maint and push ENTER.Option DescriptionScan devices Performs a scan for active and missing devices.36 English