Rinnai E75CP, E110CP, E75CN 15.2.9Error, remove the, voltage from the boiler and check fuse F2

15.2.9Error 12

short-circuit 24 Volt

remove the

voltage from the boiler and check fuse F2

due to the 24 volt short-circuit inside or outside the boiler, fuse F2 has blown. This fuse is positioned in the control unit and can be seen when the black covering lid has been removed.

check the 24 Volt

connections

remove all plugs with 24 volt connections such as: fan, pump, any three-port valve and 24 volt plug to the connecting block

check the

disconnected parts for wear and tear

reconnect power to the control unit with the disconnected parts. Reconnect the parts which have been checked and are working properly.

rectify the short- circuit or replace the short-circuited component

Installation & Servicing Instructions Rinnai E-Series

75