Bosch SHP65TL5UC Repair Instructions page 20

• The dishwasher won't run if the heat pump is disconnected
or disabled.
• The heat pump is best accessed by pulling out the
dishwasher and placing it on it's back.
• The motor and pump are isolated from each other to
eliminate leaking or binding and the need for a shaft seal.
• Depending on the model and wash cycle, heat pumps
speed up to provide more water pressure (for intensive
cycles) or slow down to provide less water pressure (for
delicate cycles). This is determined by the wash cycle
software, not the aqua sensor, so it doesn't matter how
clean or dirty the water is.
• There are two terminal connectors:
o 6-pin heater terminal on the side of the pump
o 3-pin motor terminal at the end of the motor
• Ratings:
3-pole BLDC, 110-120 VAC, 150 Hz, 1200W
thick film heater, < 80W motor, class F insulation, 5-blade
impeller with guide wheel.
702_58300000170749_ara_en_c
2
3
1. Heat pump
2. Sump
3. Drain pump
This material is intended for the sole use of BSH authorized persons and may contain confidential and proprietary
information. Any unauthorized review, use, copying, disclosure, or distribution in any format is prohibited.
4.4.2 Heat pump operation
The impeller draws water into the pump and circulates it inside
the cylindrical heating element.
water through the pump outlet to the water switch to be directed
1
to the spray arms.
While water is being circulated, the BLDC (Brushless DC) motor
senses the pump status based on the current (amp) draw of the
motor windings:
•
No water
•
Too little water (cavitating)
•
Proper water level
•
Pump blockage
Safety-related issues, such as "heating without water" or "water
too hot", are detected and evaluated.
If the pump is blocked, the pump tries several times to loosen the
blockage. If unsuccessful, the wash cycle ends and an error
code is stored in memory.
1 2
7 6 5
The guide wheel directs the
3
1. Outlet to water
switch
2. Heating cylinder w/
NTC's
3. BLDC motor
4. Impeller
5. Guide wheel
6. Inlet from sump
7. Pump housing
4
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