Test Control rod travel transmitter – loose contact Flash code: 3x long, 10x short Fault indication: Fault is not indicated by EDC indicator lamp Fault path: Control rod position transducer Signal too high Signal too low Effect of fault: This check is designed to recognise a loose contact in the connec- tion to the control rod travel transmitter Possible cause Line break, short-circuit, too little capacitance reserve (see page 31), control rod position transducer set incorrectly, injection pump defective Test precondition: EDC control unit disconnected Socket box connected 64 Test Measurement Corrective measures Test coil Measure resistance at socket box across pin 11 and pin 9 Setpoint:
18–25 Ω – Check lines – Check plug connections – If no fault found, repair injection pump Reference coil Measure resistance at socket box across pin 11 and pin 10 Setpoint: 18–25 Ω Measure resistance at socket box across pin 18 and pin 9 Setpoint: > 10 MΩ Measure resistance at socket box across pin 18 and pin 10 Setpoint: > 10 MΩ In addition to the possibility of an electrical fault, the fault described here may also be caused by incor- rect setting of the control rod posi- tion transducer – Remove injection pump – Adjust control rod position transducer