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Shu 99 Dishwasher Test Programs - Bosch SHI 4302 Troubleshooting Tips

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Page F-3A
SHU 99 Dishwasher Test Program
TEST*
Draining
Filling
Heating & Circulating
(water circulates before unit stops filling)
Draining
*To skip Heating & Circulating test:
SHU 9902/9905/9906 (Millennium) MODELS
To start test program, press and hold both POWER SCRUB PLUS and REGULAR WASH 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, SCRUB WASH, REGULAR WASH and RINSE & HOLD),
press and hold each program button. When SCRUB WASH program button is pressed, CLEAN light also comes on.
To start testing, press both POWER SCRUB PLUS and REGULAR WASH buttons a second time. When testing has
ended and a fault was detected, the following indicator lights will be lit:
POWER SCRUB PLUS
SCRUB WASH
REGULAR WASH
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), SCRUB 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), REGULAR WASH 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 9902/9905/9906 (Millennium) models program buttons & indicator lights:
See page F-3B for SHU 991x UC/06-UC/11 (Integra) Models, F-3C for SHU 991x UC/12 (Integra) Models
st
1
Edition/Revision 1
30 seconds
Until Water Level Switch (f1) closes
Until water temperature reaches
º
150
F (65
60 seconds
SHU 9902/9905/9906 (Millennium) models
SHU 991x (Integra) models
SHU 992x (Integra) models
=
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
& F-3D for SHU 992x UC/12 (Integra) Models
TIME
º
C)
¢ ¢ ¢ ¢
¢ ¢ ¢ ¢
Power
Scrub
Wash
Scrub
Plus
NOTES
Input current < 1 A
Input current ~ 11 A and
dispenser actuator comes on
Press SCRUB WASH button.
Press REGULAR WASH button.
Press REGULAR WASH button.
º
F) and water won't stop
¢ ¢ ¢ ¢
¢ ¢ ¢ ¢
Regular
Rinse
Wash
& Hold
Monday, November 20, 2000
B

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