KW9M Eco-POWER METER697.4 Self-diagnostic functionIf an error occurs, the following indication will be given.When several errors occur, [1] are indicated for the designated digits.Indicator Meaning To recover After recovery00000001 Hardware breakdown Change main unit due tothe end of hardware00000100 Firmware update failure Update again Start with updatingfirmware.00100000 Internal program error Power on again Before the abnormal10000000 Memory breakdownor crash *Change main unit due tothe end of internalmemory*Includes the possibility that the internal memory life has expired.7.5 Power Failure MemoryEco-POWER METER memories integrated electric power and working status to internal memory untilwhen power supply is off. (Power failure guarantee)And every time to change each setting, each setting value is memorized to internal memory at thesame time. Rewritable times are limited. Especially be careful if you set by communication.