839.5. TroubleshootingCosult the following checklist and error code list before contactingyour local dealer.If this measures do not improve the problem or the problem occursagain, contact your local dealer.Problem Main cause TreatmentNo display afterturning on.Battery power has beenconsumed. Replace to new batteries.Data is lost whenreplacing batteries.The backup batterydoes not charge. #1Charge it for 48 hoursusing new batteries.No pressurization Cuff is not exactlyconnected.Check the cuff and airhose concerning folding,kink and connection.No communication#2Communication cable isremoved.Confirm the cable to beconnected correctly.Battery covercannot be openedNon-standard sizebatteries were used. Contact your local dealer.#1 : Users (unauthorized maintenance personnel) cannot replacethe backup battery (lithium battery) placed on the electronicboard inside the recorder. The backup battery is charged fromthe batteries (LR6 or AA size) for the measurement.#2 : Dedicated peripheral is required.Do not disassemble or modify the recorder. It may be damaged.