Guide to diagnostics of electronic controls EWM10931
2011 SOE/DT-mdm FCPD-dp Quality-tb
61/75
599 73 77-37
Checks to perform:
E91: Communication error between the display board
and the main circuit board
E91
Inconsistency between configuration values on starting the appliance
E91
Check the wiring between the main circuit
board and the display board:
►
Detach and reconnect the connectors
on both boards several times.
►
Measure the continuity between
connector J4 (main circuit board)
and J3 (display board).
Is the wiring ok?
Replace the main circuit board and repeat
the diagnostic cycle to check for any
further alarms.
Is the appliance still displaying E91?
Replace / repair the wiring and repeat
the diagnostic cycle to check for any
further alarms.
NO
Y
E
S
Appliance ok.
NO
Replace the display board and repeat
the diagnostic cycle to check for any
further alarms.
Y
E
S
If there are burns on the circuit
board, see page 73
!
Check that all the connectors are correctly inserted
!
MAIN CIRCUIT
BOARD
DISPLAY
CIRCUIT BOARD
0
Ω