Rinnai E75CN - Manual (Page 74)

Installation & Servicing Instructions Rinnai E-Series
74
check the interface
and the ribbon
cable between the
control unit and the
display
the error persists
after reset
software error
control unit
control unit error
incorrect data will be detected in case of a
poor connection between the control unit and
the display or if the interface is incorrectly
positioned. If necessary, replace the ribbon
cable between these two components.
replace the control unit. The controller will
automatically load the program into the new
control unit.
15.2.8 Error 11