LOOKING FOR ELECTRICAL CONNECTIONS FOR w bOSCH 40cd1?

aS AN ELECTRICAL CONTRACTOR I HAVE BEEN ASKED TO LOOK AT THE CONNECTIONS ON A WORCESTER BOSCH CD1 CONVENTIONAL BOILER. AS FOR SOME REASON IT KEEPS CUTTING OUT HOWEVER THE CLIENT HAS NO INTSTALLATION GUID FOR THE UNIT AND THEREFOR i AM LOOKING FOR THE INSTALATION MANUAL INCLUDEING THE FAULT CODES FOR THE UNIT