代码 231-C038: Voltage monitoring CC%2 voltage ID: %4

[Cause of error] - The voltage monitoring of the CC supply voltage reports an error in the CC displayed. - The cause of the error message could be the 5 V power supply of the CCs over the power bus (X69). With large line lengths on the power bus, the 5 V power supply may have to be wired additionally over X74. (Use short line lengths and large line cross section, and check voltage drops on lines between X74.) - Defective power supply unit in the supply module (5 V power pack in the UV). [Error correction] - Establish a 5 V supply between the supply module and the CCs via X74 - Check the 5 V power supply (usually on supply module X74) - Check the 5 V power supply on all CCs (X74/CC) - Check the supply bus (X69) - Check the wiring: - Wiring of the supply bus (X69) - Wiring of the 5 V supply (X74) - Check the cable length of the supply bus (X69), if necessary use double lines - Check the 5 V supply voltage at X74 of all CCs if necessary, increase the wire cross sections or reduce the cable length - Check the voltage attenuation on the cable between X74 on the supply module and X74 on the CCs - Exchange the power supply - Exchange defective hardware (CC) - Inform your service agency, stating the alarm number and Voltage ID