31AttachmentsTroubleshootingBefore requesting service, check the following items. Contact your dealer if the problem does not appear here, if the problem is not resolved bythese remedies, or if you have any questions about settings and installation.ProblemsProblem Check item/remedy PagePower is not turn on.Make sure that the power plug is firmly connected to the electric outlet. -Make sure the provided power cord is firmly connected to the equipment. page 12The [ERROR] indicator lights orange.Temperature is too high, stop operationas soon as possible.The fan has malfunctioned and stopped.Contact a your dealer. -Make sure that nothing is blocking the vents in front or the fan on the rear. page 7The extension unit's internal temperature is too low or high.Install the product within the ambient operating temperature. page 7When the [ERROR] indicator lights orange, the internal temperature may behigh.Make sure that dust has not collected on the vents.-The extension unit is not recognized.Make sure that the connection cable provided is being used. page 16Make sure that the connection cable is not loose. page 16Was the extension unit turned on before the network disk recorder?Reboot the system and turn on the extension unit first. page 18If you are using a breaker or other system to turn on the power to the entiresystem simultaneously, make sure that all the devices are connected to thesame power source.-If you are using UPS (uninterrupted power supply), connect all the devicesto the same UPS. -HDD is not recognized.The HDD status indicator does notlight.Make sure the HDD unit is firmly inserted into the disk slot. page 23Have you insert another HDD unit while the first unit was being recognized?Remove the unrecognized HDD unit and try again. page 23HDD has errors. -HDD status indicator lights, but HDD isnot recognized. Link the HDD from the network disk recorder again. page 23The [ERROR] indicator lights red. System has errors.Contact your dealer. -HDD indicator lights or blinks redMake sure that the HDD units are installed in order from HDD 1 to 9.Surely install the HDD units in order starting with HDD 1. page 23HDD has troubles in RAID5/RAID6 mode.The indicator of the first HDD with error lights, and the indicators of otherHDDs with errors blink.page 29