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Guide to diagnostics of EWX11831 electronic controls
2013 TS/DT-mdm FCPD-dp
59/71
599 77 00-82 Rev. 01
Checks to perform:
E91
E91: Communication error between the display board and the main
circuit board (2
st
part)
E91
Inconsistency between configuration values on starting the appliance
If there are burns on the circuit board,
see page 69
!
Check that all the connectors are correctly inserted
!
Follow from page 58
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 J19 (main circuit board) and
J2 (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
Appliance ok
NO
Replace the display board and repeat the
diagnostic cycle to check for any further
alarms.
MAIN CIRCUIT
BOARD
DISPLAY
CIRCUIT BOARD
0
Ω
Y
E
S
Y
E
S