Smeg CW–511 MDA User Manual page 19

E.7
Boiler heating malfunction (does
not heat up)
E.8
Tank heating malfunction (does
not heat up)
E.9
Microprocessor failure
CW/CWH – 511 MDA
disconnect it from the electrical mains.
Unscrew the screw A, release the tang B and lift it.
Check that the impeller of the drain pump underneath the
cover turns freely, and is free from dirt, limescale residues,
or pieces of glass. Never use tools, screwdrivers, scissors,
etc.
‐circuit board relay failure
‐ boiler heating element faulty or "furred" with limescale
‐ boiler temperature probe faulty or incorrectly positioned
‐circuit board relay failure
‐ tank heating element faulty or "furred" with limescale
‐ tank temperature probe faulty or incorrectly positioned
Replace circuit board
19