Guide to diagnostics of electronic controls EWM10931
2011 SOE/DT-mdm FCPD-dp Quality-tb
24/75
599 73 77-37
E21: Drain difficulty
E21
Maximum drain time exceeded (measured for every cycle phase)
E21
Checks to perform:
Clean the filter and repeat the diagnostic cycle
to check for any further alarms.
Is the drain filter clean?
Disconnect and check the drain system
and repeat the diagnostic cycle to check
for any further alarms.
Is the drain system ok?
(drain tube and water system of the home)
-(fig.1)-
Is the drain pump
working?
(in the diagnostic
cycle, select
phase 2
fill and
phase 9
drain)
(noise from
the pump)
Is the resistance
measurement of the
pump approximately
155÷200
Ω
?
(Measure it directly
on the connector on
the board side
between J6-3 and
J4-4)
-(fig.4)-
Replace the pump
and repeat the
diagnostic
cycle to check
for any further
alarms.
Is the resistance
measurement of the
pump approximately
155÷200
Ω
?
(Measure it directly
on the pump)
-(see fig. 5)-
Check/replace the wiring and repeat
the diagnostic cycle to check for any
further alarms.
Is the pump
rotor mechanically
blocked or
broken?
Is the pressure switch's water circuit efficient?
(no clogging)
Replace the circuit board and repeat
the diagnostic cycle to check for any
further alarms.
Repair the water circuit of the pressure switch
and repeat the diagnostic cycle to check for any
further alarms.
Clean/replace the drain pump and repeat the diagnostic cycle to check
for any further alarms.
Replace the pressure switch and repeat
the diagnostic cycle to check for any
further alarms.
NO
NO
NO
NO
NO
NO
Y
E
S
NO
Y
E
S
Y
E
S
Y
E
S
Y
E
S
Y
E
S
Y
E
S
Check that all the connectors are correctly inserted
!
If there are burns on the circuit
board, see page 73
!