GE PDW8900 Series Technical Service Manual page 29
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Also See for PDW8900 Series:
- Owner's manual (48 pages) ,
- Quick start (2 pages) ,
- Technical service manual (37 pages)
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Urculation Pump and Motor
The dishwasher has a new pump design that
includes a wax motor, magnet, and a steel ball used
for Single Rack WashTM. This pump must be replaced
with the same pump design (kit # W026X100291.
The pump housing contains a molded channel to
direct the movement of the ball towards the venturi.
The plastic shell which encases the stainless steel
ball has ribs to prevent the ball from sticking in the
venturi.
The dishwasher must be removed from its
installation to gain access to the circulation pump
and motor. The circulation pump can be activated
using Service Mode. Refer to schematic or strip
circuit for motor resistance value.
Before removing the circulation pump, remove the
water from the sump with a syringe.
It is important to remember that the motor does
not start immediately when the dishwasher cycle
has started
160
seconds after water begins to fill).
If the motor hums but will not start, make certain
the pump impeller is free from obstruction and the
motor shaft turns freely.
The terminals on the induction motor are labeled L 1
and N. The motor is thermally protected (internally)
through the L1 side. The wiring connector is blue t o
match the wire leading to the motor.
It
is designed to
fit only one way on the terminals. Make certain the
connector is fully seated when installing.
The replacement motor pump assembly contains a
new ball.
Caution: Be sure the ball is in place and held by the
mognet before reassembling the unit.
Note: It is important that the hex-head motor-
hanger screw is tightened securely when reinstalling
the circulation pump.
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Circulation Pump
and
Motor Strip Circuit
CIRCULATION
PUMP
DK. BLUE
WHITE
J 2 4
8
T O
n
4
The wax motor and magnet (part
#
WD21X10235)
are an assembly and are held to the pump housing
by 2 Phillips screws. The wax motor operates on
120
VAC. It
takes approximately 45 seconds for the
mognet to retract far enough to release the steel
ball when the wax motor is at room temperature.
The wax motor is energized for approximately 1
minute.
the dishwasher door is opened during the Single
Rack WashTM, the ball will once again be held by the
.
-
magnet until the wax motor retracts the magnet
from
the
steel ball
45
seconds).
Wax
Motor
Strip Circuit
WAX MOTOR
(CIRCULATION
PUMP)
GRAY
WHITE
J2-2
1200
-
2800
R
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