MiCOM P921/P922/P923 - Schneider - error

P92x/EN GS/F22Page 10/22Getting StartedMiCOM P921/P922/P923• Under the bottom hinged cover:−−Former battery compartment (holds a ½AA size battery which was used formemory back-up for event, fault and disturbance records (P922 and P923 only)).a 9-pin female D-type front port for communication with a PC locally to the relay(up to 15m distance) via a RS232 serial data connection (SK1 port).The fixed function LEDs on the left hand side of the front panel are used to indicate thefollowing conditions:LEDS Colour Labels SignificanceLED1 Red Trip. LED 1 indicates when a trip order has been issuedby the relay to the cut-off element (circuit breaker,contactor). This LED recopies the trip order issuedto the trip output contact (RL1). Its normal state isunlit. It is illuminated as soon as a trip order isissued. It goes out when the associated alarm isacknowledged (by pushing the key).LED2 Yellow Alarm LED 2 indicates that an alarm has been registeredby MiCOM P921, P922 or P923 relays. The alarmsare either threshold crossings (instantaneous), ortripping orders (time delayed). The LED will flashuntil the alarms have been accepted (read), afterwhich the LED will change to constant illumination,and will extinguish when the alarms have beencleared.LED3 Orange Equip Failure LED 3 is dedicated to the internal alarms of MiCOMP921, P922 and P923 relays. When a « noncritical » internal alarm (typically communicationFault) is detected, the LED flashes continuously.When the Fault is classed as « critical », the LED isilluminated continuously. The extinction of this LEDis only possible by the disappearance of the causethat caused its function (repair of the module,disappearance of the Fault).LED4 Green Aux Supply LED 4 indicates that MiCOM P921, P922 and P923relays are in correct working order.LED5 toLED8Red Aux1 to Aux4 These LEDs can be programmed by the user on thebasis of information on available thresholds(instantaneous and time-delayed). The user selectsthe information he wishes to see associates witheach LED from the menu element (Logic OR). EachLED illuminates when the associated information isvalid. The extinction of each LED is linked to theacknowledgement of the associated alarms.