Bosch SHI 4302 Troubleshooting Tips page 15

B
SHU/SHI/SHV Dishwasher Quick Check Chart
To check
ü ü ü ü Float switch
HINT: Any debris (e.g. a
(cont.).
cable tie) in dishwasher base
can move under float and turn
on float switch. Clean all
debris from dishwasher base.
ü ü ü ü Aqua sensor ü ü ü ü Find three brown wires
(SHU 53-- &
68—only)
HINT: The aqua HINT: Don't check this
sensor does not unless customer has brought
affect washability up long wash times (and has
and should not be measured them). The sensor
replaced (unless a checks water clarity and adds
leak has occurred a wash/rinse cycle only when
around it). the rinse water is still dirty.
ü ü ü ü Circulation ü ü ü ü At control module,
motor measure resistance
(SHU/I models)
between white/red wire
on 1
& 2
right on 4
from left (≈ 10 Ω).
HINT: For SHV models,
measure between white/red
wire at left of 2
white wire at middle of 4
harness.
ü ü ü ü Detergent ü ü ü ü Resistance through
dispenser
actuator
ü ü ü ü Top rack ü ü ü ü At control module,
only actuator
(SHU/I 68--
& SHV 48--
models
only).
st
1 Edition/Revision 0-A
Measure
at far right of control
module. Measure
resistance between
middle wire and left
(preferred) or right
wire (≥ 1 MΩ).
st
harness from left
nd
blue wire from
th
harness
nd
harness &
th
"wax" motor terminals
(≈ 2150 Ω).
measure resistance
(SHU/I models)
between white wires of
rd
3 harness (from left) -
- (≈ 2150 Ω).
If yes
ü ü ü ü Sensor may be OK.
HINT: Can also measure
resistance between inner
terminal (light) and either
outer terminal (sensor) of
sensor itself.
HINT: Due to nature of
sensor, resistance readings
can be inconsistent.
ü ü ü ü Circulation motor may
be OK – more testing
may be needed (if
debris entered
impeller).
HINT: Debris can get in if
filter basket wasn't properly
screwed in and locked. Don't
remove motor to clean
impeller – remove filter
basket/screen and reach
through right side of sump
into impeller.
ü ü ü ü Actuator motor may be
OK – more testing
may be needed.
ü ü ü ü Actuator motor may be
OK – more testing
may be needed.
HINT: For SHV models,
measure between white/red
nd
wire at left of 2 harness &
th
white wire at middle of 4
harness.
Page C-3
If no
HINT: Must pull out
dishwasher and remove left
side panel to access float
switch.
ü ü ü ü Turn off dishwasher
and replace sensor.
HINT: Must pull out
dishwasher and remove left
side panel to access sensor
(for measuring or replacing).
Sensor can be pulled out of
sensor assembly at rear of
sump.
ü ü ü ü Turn off dishwasher
and replace circulation
motor.
HINT: Must pull out
dishwasher and remove or
tilt/block up tub to remove or
replace motor – do so only if
certain motor has failed or
impeller is jammed with
debris.
ü ü ü ü Turn off dishwasher
and replace actuator
"wax" motor.
ü ü ü ü Turn off dishwasher
and replace actuator
"wax" motor.
Tuesday, May 11, 1999