Modular residual current device

HEX	DEC	Error response	Meaning	Cause	Solution
16#9120	37152	Immediate energy storage disconnection (30)	MRCD alarm: The MRCD alarm has tripped.	Fault current in energy storage unit with tripping current is greater than alarm threshold Feedback contact to SEW IO module has poor contact or wire break	Check the energy storage unit for ground fault. In the event of a ground fault, disconnect the energy storage unit via the disconnecting switch and then discharge it safely. For safety reasons, do not work on the energy storage unit or the DC link after it has been discharged. Check the signal cable from the MRCD to the SEW IO module.
16#9121	37153	None	MRCD pre-alarm: The MRCD pre-alarm has tripped.	Fault current in energy storage unit with tripping current is greater than pre-alarm threshold Feedback contact to SEW IO module has poor contact or wire break	If the fault occurs repeatedly, check the energy storage unit for ground fault. In the event of a ground fault, disconnect the energy storage unit via the disconnecting switch and then discharge it safely. For safety reasons, do not work on the energy storage unit or the DC link after it has been discharged. If the error occurs more frequently, check the signal cable from the MRCD to the SEW IO module.
16#9122	37154	Error message + emergency stop (10)	IO exchange not linked.	The function block for replacing the DI/DO signals is incorrect or not linked.	Connect the function block correctly.
16#9123	37155	Immediate energy storage disconnection (30)	IO exchange reports communication error.	SBus^PLUS communication is not OK and the IO module from which the values are retrieved cannot be accessed. The interface to the "LogicalDevice" of the IO module has not been linked	Check the SBus^PLUS communication. Check the cabling of the SBus^PLUS. Program the link or alternatively switch off the check via property (see manual).
16#9124	37156		MRCD test interval expired.	The configured minimum time of days since the last test has elapsed.	Disconnect the storage unit from the DC link and perform synchronization via the MOVI-C^® CONTROLLER. A test is performed and the current timestamp is saved.
16#9125	37157	Immediate energy storage disconnection (30)	MRCD test failed	MRCD hardware defect Wiring problem	Check MRCD and replace if necessary. Check the cabling between MRCD and IO module.