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:roll: Can anybody help. I have just installed a Sunvic 207XL in place of a danfoss MP15 programmer, they were both set to 24hrs, wiring on back plate is N(neutral) L(live) 1(DHW off) 2(not connected) 3(DHW on) 4(HTG on), this all worked fine for 2 days and then the Sunvic started to "click"...