Bosch SHI 4302 Troubleshooting Tips page 21

B
SHU/SHI/SHV Dishwasher Troubleshooting Chart
Problem
ü ü ü ü Water won't fill.
NOTE: An "F" fault code
in the display for SHU/I
53/68 dishwashers
shows there's a filling
problem (
not filling, over-
filling, underfilling or water in
). The fault code
the base
can't be reset manually –
it will reset itself 15
minutes after the
dishwasher has been
turned on (after testing
how it fills).
ü ü ü ü Detergent or
rinse aid won't
dispense
properly.
ü ü ü ü Refill rinse aid
light won't come
on
(SHU/I 53/68 &
.
SHV 48 models)
ü ü ü ü Water doesn't
circulate.
ü ü ü ü Water doesn't
heat up properly.
st
1 Edition/Revision 0-A
Possible Cause
ü ü ü ü Customer water supply
turned off or disconnected.
ü ü ü ü Water valve (s2) failed.
ü ü ü ü Water level switch (f 1) failed.
ü ü ü ü Timer (SHU 30/40 models) or
module (all other models)
failed.
ü ü ü ü Water in dishwasher base
operated float switch (e 6).
ü ü ü ü Dispenser actuator (A 2)
failed.
ü ü ü ü Detergent dispenser door is
jammed.
ü ü ü ü Rinse aid level switch (reed
switch e 3) failed.
ü ü ü ü Circulation motor (m2) failed.
ü ü ü ü Timer (SHU 30/40 models) or
module (all other models)
failed.
ü ü ü ü Hi-Limit (f5) tripped and failed
to reset.
ü ü ü ü NTC (temperature sensor)
failed.
o o
ü ü ü ü 140 F (f 3) or 161 F (f4)
thermostat (SHU 30/40
models) failed.
Suggested Action
ü ü ü ü Reconnect and turn on customer water
supply.
ü ü ü ü Check resistance @ water valve
terminals (≈ 1000 Ω). Turn off
dishwasher and replace faulty valve.
ü ü ü ü Turn off dishwasher and replace faulty
level switch.
ü ü ü ü Check voltage at and wiring to timer or
module. Turn off dishwasher and
replace faulty timer or module (for
SHU/I 43/53 models, install existing
module jumper onto new module).
ü ü ü ü Turn off dishwasher, drain water
manually from dishwasher base, find
source of leaking water and fix water
leak.
ü ü ü ü Turn off dishwasher and replace
actuator.
ü ü ü ü Free jammed detergent dispenser
door.
ü ü ü ü Turn off dishwasher and replace reed
switch.
ü ü ü ü Turn off dishwasher and replace motor.
ü ü ü ü Check voltage at and wiring to timer or
module. Turn off dishwasher and
replace faulty timer or module (for
SHU/I 43/53 models, install existing
module jumper onto new module).
ü ü ü ü Run test program (SHU/I 43/53/68
models) – measure current to
dishwasher. If current ≈ 11A, Hi-Limit
is OK. If not (and for all other models),
turn off dishwasher and measure
resistance @ Hi-Limit terminals (≈ .3
Ω). Replace faulty Hi-Limit.
ü ü ü ü Turn off dishwasher and check
resistance of NTC (≈ 55 kΩ @ 72
Replace faulty NTC.
ü ü ü ü Turn off dishwasher and replace faulty
thermostat.
Page D-4
o
F).
Tuesday, May 11, 1999