9 TroubleshootingPROBLEM PROBABLE CAUSE SOLUTION• The LED of the CS does notchange to Green ON.• The optional service card isnot working.• Install the card properly.• CS is not connectedproperly.• Make sure that the cable is connectedproperly with correct pin assignments.Also, make sure that the cable does notmake short circuits.• CS is not set for normaloperation.• Switch all DIP switches off.• The status of the port thatthe CS is connected to isOut of Service.• Change the port status from Out ofService to In Service using theMaintenance Console.KX-TDA0158 CS to aKX-TDA600/KX-TDE100/KX-TDE200/KX-TDE600>• The Local Processor (LPR)software of thecorresponding DHLC/DLCcard is not version 5.000 orlater.• Upgrade the LPR software of theDHLC/DLC card.• The maximum number ofPS calls that the CSsupports cannot be made.• Poor connection • Make sure that a 4-pair cable is usedfor connection.• The LED of the CS staysRed ON during normaloperation.• CS malfunction • Replace the CS.• "CLEAR SCAN DATA" isdisplayed on the PS'sscreen after turning on thePS.• The PS cannot be used fornormal operation whenscan data is stored on thePS.• Clear the scan data by following theprocedure described in "Clearing theStored Scan Data" in this guide.• Cannot register the PS. • Wrong PersonalIdentification Number (PIN)is registered to the PS.• Enter the PIN set to the PBX into thePS.• PS becomes out of range.• Cannot make calls usingthe PS.• Location of CS is not good.• Access system of the PS isnot properly set.• Locate the CS properly (refer to "5 SiteSurvey Using the KX-TCA175/KX-TCA255/KX-TCA256/KX-TCA275/KX-TCA355/KX-TD7590").• Change the access system setting ofthe PS to the appropriate system orautomatic.56 Quick Installation Guide9 Troubleshooting