Siemens CU240B/E-2 Error Codes: List of 39 Codes and Their Meaning

This is the list of fault, alarm codes the Siemens manual gives for the CU240B/E-2 control unit. Find your code below and open it for what the manual says about its causes and what to do.

Fault codes from p. 670

Code	What it means	Page
`F01600`	SI P1: STOP A initiated	p. 670
`F01650`	SI P1: Acceptance test required	p. 672
`F01651`	SI P1: Synchronization safety time slices unsuccessful	p. 672
`F01653`	SI P1: PROFIBUS configuration error	p. 673
`F01655`	SI P1: Align monitoring functions	p. 673
`F01656`	SI P1: Parameter processor 2 parameter error	p. 673
`F03505`	CU: Analog input wire breakage	p. 688
`A03510`	CU: Calibration data not plausible	p. 688
`F06922`	Braking resistor phase failure	p. 690
`F07011`	Drive: Motor overtemperature	p. 690
`A07012`	Drive: I2t motor model overtemperature	p. 690
`A07015`	Drive: Motor temperature sensor alarm	p. 690
`F07016`	Drive: Motor temperature sensor fault	p. 691
`F07080`	Drive: Incorrect control parameter	p. 691
`F07082`	Macro: Execution not possible	p. 691
`F07984`	Drive: Speed controller optimization, moment of inertia	p. 706
`F07985`	Drive: Speed controller optimization (oscillation test)	p. 706
`F30017`	Power unit: Hardware current limit has responded too often	p. 713
`F30021`	Power unit: Ground fault	p. 713
`F30022`	Power unit: Monitoring U_ce	p. 714
`F30024`	Power unit: Overtemperature thermal model	p. 714
`F30025`	Power unit: Chip overtemperature	p. 714
`F30027`	Power unit: Precharging DC link time monitoring	p. 715
`A30042`	Power unit: Fan operating time reached or exceeded	p. 718
`F30081`	Power unit: Switching operations too frequent	p. 720
`F30105`	PU: Actual value sensing fault	p. 720
`A30502`	Power unit: DC link overvoltage	p. 720
`F30600`	SI P2: STOP A initiated	p. 720
`F30611`	SI P2: Defect in a monitoring channel	p. 721
`F30625`	SI P2: Sign-of-life error in safety data	p. 722
`F30649`	SI P2: Internal software error	p. 722
`F30650`	SI P2: Acceptance test required	p. 722
`F30651`	SI P2: Synchronization with Control Unit unsuccessful	p. 723
`F30655`	SI P2: Align monitoring functions	p. 723
`F30656`	SI P2: Parameter processor 2 parameter error	p. 723
`F30659`	SI P2: Write request for parameter rejected	p. 723

Alarm codes from p. 731

Code	What it means	Page
`F30903`	Power unit: I2C bus error occurred	p. 731
`F50510`	FBLOCKS: Logon of the run-time group rejected	p. 731
`F50511`	FBLOCKS: Memory no longer available for free function blocks	p. 731

Codes and descriptions are taken from the manufacturer’s manual; page numbers link to the PDF. ManualLib is not affiliated with Siemens. Found a mistake? Report an error.