E87: User Interface Microcontroller Fault; E91: User Interface And Main Board Communication Error - Frigidaire FFLE3911QW Technical & Service Manual

E87: User Interface microcontroller fault

E87
User Interface defective.
Checks to perform:
Replace the User Interface Board and repeat the Diagnostic Cycle to check for any further alarms.

E91: User interface and Main Board communication error

E91
Wiring problem, Motor Control Board defective, Main Control Board defective,
User Interface Board defective.
Checks to perform:
Is the wiring between Main Control Board, Motor Control
Board and User Interface Board proper? (Check for the
continutity)
Replace the User Interface Board and check for further
alarms. Is the appliance ok?
Replace the Motor Control Board and check for further
alarms. Is the appliance ok?
Y
E
S
N
O
WARNING
Check that all the connectors are correctly inserted.
WARNING
Check that all the connectors are correctly inserted.
Replace / Repair the wiring and repeat the Diagnostic
NO
Cycle to check for any further alarms.
YES
Replace the Main Control Board and repeat the
NO
Diagnostic Cycle to check for any further alarms.
186
E87
E91
Appliance is ok