Rinnai E75CN - Manual (Page 72)

Installation & Servicing Instructions Rinnai E-Series
72
check the ribbon
cable between
the control unit
and the display
the error persists
after reset
software error
control unit .
incorrect data will be detected in case of a poor
connection between the control unit and the
display. 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.
control unit error
15.2.6 Error 05