Description
Test function/connection monitoring
The device carries out a self test when supply voltage is fed and later at hourly intervals.
During the self test, the internal device functions, the connections to earth (E/KE) and the current transformer connections are monitored for interrruption and short-circuit.
In the event of a fault, the alarm relay K1 switches and the LEDs ON/AL1/AL2 flash.
The respective error code appears on the LC display.
After eliminating the fault, the alarm relay automatically switches to its initial position.
By pressing the test button, on the IR427 or on the MK7, the device functions and also the relay function will be tested.