Troubleshooting6-2Part 1032059B 2003 Nordson CorporationManual 41-DURABLUE-MA-02Melter FaultsTable 6-1 lists the four types of melter faults, potential causes, and expectedcorrective actions.Table 6-1 FaultsFaultCode/Sub-code Fault Name Cause Corrective ActionF1/None RTDThe RTD for the component indicated hasfailed or the component was disconnectedfrom the melter.Replace RTDCheck hose/gun connectionsSee flowchart T.2F2/None Under temperatureThe actual temperature of the componentindicated has dropped below the undertemperature delta, which was set usingparameter 22.Check for conditions that maycause a drop in ambienttemperatureRaise the set-point temperature ofthe componentReplace RTDSee flowchart T.2F3/None Over temperatureThe actual temperature of the componentindicated has increased beyond the overtemperature delta, which was set usingparameter 21.Replace RTDSee flowchart T.2F4/1 RAM test Internal RAM failure Replace CPUF4/2 Internal Clock time Internal clock failure Replace CPUF4/4 Internal clock batterybacked RAMBattery-backed RAM failure Replace CPUF4/5 Internal clock battery Battery-backed RAM battery dead Replace CPUF4/6 Analog-to-digital RTD analog-to-digital converter failed Replace main board or ribboncableF4/7 Analog-to-digitalcalibrationRTD analog-to-digital converter could not becalibratedReplace main board or ribboncableF4/8 Main board feedback Communication failure between main boardand CPUReplace main board, ribbon cable,or CPUF4/A Thermostat Thermostat is open Replace thermostat, XP6 harness,or main board