GE ADT521PGJ Series, Technical Service Manual

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Drain Pump
Check Valve
Drain Components
The Drain Pump is located on the sump assembly
and uses a hose to connect the sump to the drain
pump. A wire hanger is used to secure the pump to
the sump. The High Drain loop is connected to the
drain pump outlet and secured to the side of the
tub with molded channels in the tub. The drain hose
is connected to the drain loop, and to the house
drain system. Installation requires the drain hose to
provide for a second high drain loop.
• Inside the High Drain Loop is a Check valve
preventing drain water reentering the
dishwasher.
Operation
The Drain Pump is a 120 volt AC synchronous motor,
resistance of the motor windings is 27 ohms +
RU³'UDLQZDWHUZLOOEDFNÀXVKWKH¿QH¿OWHU
WKURXJKWKHFRDUVH¿OWHUDOORZLQJIRRGSDUWLFOHV
WRVHWWOHWKURXJKWKHÀRRUSODWHDQGLQWRWKHGUDLQ
pump. It is normal for the drain pump to start and
stop several times during each drain cycle; this is
normal. To ensure proper drain, the drain pump
will pause several times in each drain cycle. This is
done to protect against air locks and allow for peak
performance.
Drain Cycle Algorithm
• 3 seconds on
• VHFRQGVRȺ
• 3 seconds on
• VHFRQGVRȺ
• 15 seconds on
• Repeat above steps
• 60 seconds on
Some Cycles have a Partial Drain, the Algorithm
changes to below
• 3 seconds on
• VHFRQGVRȺ
• 3 seconds on
• VHFRQGVRȺ
• 15 seconds on
A 12 foot drain hose accessory is available
separately, (Part #: GPF12). The drain pump has a
maximum height capability of 72 inches (poor drain
will result if drain hose is higher than 72 inches).
Drain System