GPD-100 Instruction ManualPAGE 25 of 27 Rev 1.1(2019.05.23)7.3. Recovery ListNo. Possible cause Corrective action1 Sensor Cartridge connection fail1) Check Sensor Cartridge connection2) Sensor Cartridge must be returned to the factoryor authorized service center for repair.2 Sensor Cartridge Unit fault. Sensor Cartridge must be returned to the factory orauthorized service center for repair.3 Gas Sensor Fault Replacement of gas sensors4 EEPROM Fault of SensorCartridge Unit.1) After EEPORM format of sensor cartridge, Re-setting and re-calibration.2) If the same fault occurs, Sensor Cartridge must bereturned to the factory or authorized service centerfor repair.5 Flow Sensor fault of Main unit. Main unit must be returned to the factory orauthorized service center for repair.6 Flow rate was measured at 0% orless1) check Inlet, Outlet flow status2) If the same fault occurs, Main unit must bereturned to the factory or authorized service centerfor repair.7 Flow rate was measured at 120%or over.Main unit must be returned to the factory orauthorized service center for repair.8 CEC connection fault1) Check CEC connection status2) If the same fault occurs, CEC unit must bereturned to the factory or authorized service centerfor repair.9 Heater fault of CEC CEC unit must be returned to the factory orauthorized service center for repair.10 EEPROM Fault of Main unit.1) After EEPORM format of main unit, Re-setting andre-calibration.2) If the same fault occurs, Main unit must bereturned to the factory or authorized service centerfor repair.11 CEC fault CEC unit must be returned to the factory orauthorized service center for repair.12 Main unit fault Main unit must be returned to the factory orauthorized service center for repair.14 Time setting status error1) Time resetting of main unit2) Replacement of Backup Battery3) If the same fault occurs, Main unit must bereturned to the factory or authorized service centerfor repair.13 Calibration period is expired 1) re-calibration.2) Replacement of gas sensors