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1) Prevent dust / water or any foreign material ingress inside MM- relay.
2) There should not be any loose connection in connector terminal, small loose can cause arc/spark , which leads overheating/ over-burden of the relay.
3) MM-is a microprocessor / Electronic relay. So increase in surrounding temperature may cause fetal damage.
4)There should not be any short ckt or open-ckt of CT in Relay terminal cable.Which may burn the relay / relay cards, etc........
5) In case of re-connection, assure proper connection.
