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Shu 33 Dishwasher Test Program - Bosch SHI 4302 Troubleshooting Tips

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SHU 33 Dishwasher Test Program

TEST*
Draining
Filling
Heating & Circulating
(water circulates before unit stops filling)
Draining
* To skip Heating & Circulating test:
SHU 33 MODELS
To start test program, press and hold both POWER SCRUB PLUS and RINSE & HOLD program buttons, then turn unit on
by pressing ON/OFF button. When program buttons are released, lights above them will flash. To end test program, press
ON/OFF button.
To check program indicator lights (POWER SCRUB PLUS, REGULAR WASH and RINSE & HOLD), press and hold each
program button. When REGULAR WASH program button is pressed, CLEAN light also comes on.
To start testing, press both POWER SCRUB PLUS and RINSE & HOLD buttons a second time. When testing has ended
and a fault was detected, the following indicator lights will be lit:
POWER SCRUB PLUS
REGULAR WASH
RINSE & HOLD
To check for heater, high limit or flow switch problems, start testing until heating starts. Using a meter with a current coil,
measure current going into dishwasher. If current is ~ 11 A, then heater, high limit and flow switch are OK. If current stays
at ~ 1.5-2 A, then heater, high limit or flow switch are faulty.
If water level switch (f 1 ) has failed (opened), REGULAR WASH light will come on and unit will continually fill and drain
where testing won't be completed. If flow switch (e 5 ) has failed (opened), water won't heat (to 150
circulating. If NTC probe (f 2 / f 4 ) has failed (opened), RINSE & HOLD light will come on immediately and testing will end
shortly after water has started circulating.
If more than one fault occurs, more than one light will be lit.
SHU 33 models program buttons & indicator lights:
st
1
Edition/Revision 0-A
30 seconds
Until Water Level Switch (f1) closes
Until water temperature reaches
º
150
F (65
60 seconds
=
Heater fault
=
Water filling fault (over or under filling)
=
NTC (temperature sensor) fault – note circulation motor stops shortly after it started
during an NTC fault
Clean
¢ ¢ ¢ ¢
TIME
º
C)
SHU 33 models
Power
Regular
Scrub
Wash
Plus
¢ ¢ ¢ ¢
¢ ¢ ¢ ¢
l l l l
Cancel
Drain
NOTES
Input current < 1 A
Input current ~ 11 A and
dispenser actuator comes on
Press REGULAR WASH button.
º
F) and water won't stop
Rinse
& Hold
¢ ¢ ¢ ¢
l l l l
Monday, April 24, 2000
B

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