CHAPTER 2 DIAGNOSIS2.3 ERROR CODESThe following table lists error codes, possible causes and remedies. If the problem persists,contact Ohaus Corporation.TABLE 2-6. ERROR CODESERROR CODE PROBABLE CAUSE REMEDYError 7.0 Unstable weight readingwhen defining the referenceweightEliminate vibration anddrafts.Error 8.0 Weight reading belowPower On/Zero limit.Put pan on balance.Error 8.1 Weight reading exceedsPower On/Zero limit.Clear panError 8.3 Weight reading exceedsoverload limit.Clear pan.Error 8.4 Weight reading belowunderload limit.Put pan on balance.Error 9.0 Internal fault. Restore EEPROM data,using Software ServiceTool. (See Appendix C.1).Replace Main PCB.Error 9.5 Production calibration notpresent.Perform Service Calibration(See Appendix B).Error 9.8 User calibration data notpresent. (Required forLFT ON only)Calibrate balance.Error 53 EEPROM checksum error. Cycle power on, off. Ifbalance fails to operate,restore EEPROM data.LOW REF WT Average piece weight toosmall. (Warning only –count will continue.)See Instruction Manual formore detail.REF WT Err Reference weight too small.The weight on the pan istoo small to define a validreference weight.Increase sample size.Busy (during tare, zero, printing,calibration, etc.)Wait until completion.- - - - - - - - - - - Unstable weight reading If balance is level, inappropriate environment,repair Load Cell.Ohaus Corporation www.ohaus.com 2-6 Discovery Balance Service Manual
