Test #7: Drain & Recirculation Pump - Whirlpool WTW9500E SERIES Service Manual

WARNING
Electrical Shock Hazard
Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or
electrical shock.
TEST #7: Drain & Recirculation Pump
Perform the following checks if washer does not drain.
IMPORTANT: Whenever the washer is tilted for service or
troubleshooting, drain water from the basket, remove any load
items in the basket, and, if equipped, remove bulk dispense drawer.
1. Check for obstructions in the usual areas. Clean and then
perform step 2.
2. Check the drain pump (and recirculation pump, on some
models) and electrical connections by turning on the
drain pump (and recirculation pump, on some models)
in Service Test Mode on page 2-3. The following steps
assume that this step was unsuccessful.
3. Unplug washer or disconnect power.
4. Remove console to access main control.
5. Visually check that the J4 connector is inserted all the way
into the main control.
¾ If visual check passes, go to step 6.
¾ If connector is not inserted properly, reconnect J4 and
repeat step 2.
6. Remove connector J4 from main control. With an
ohmmeter, verify resistance values shown below across
the following J4 connector pinouts:
Component J4 Connector Pinout
Drain Pump J4, 1 & 3
Recirc. Pump J4, 1 & 5
DRAIN/RECIRCULATION PUMP
DRAIN & RECIRCULATION PUMPS
MAIN BOARD
L1
PUMP
BK
J12-1
RELAYS
For Service Technician Use Only
Correct Resistance
18-24 W
26-32 W
DRAIN PUMP
18-24 W 12-15 Ω
P
BU
A
J4-3
LBU
J4-5
RECIRCULATION PUMP
¾ If values are open or out of range, go to step 7.
¾ If values are correct, go to step 11.
7. Tilt washer back to access drain pump (and recirculation
pump, on some models). Verify pump is free from
obstructions.
8. Visually check the electrical connections at the drain
pump (and, on some models, the recirculation pump).
¾ If visual check passes, go to step 9.
¾ If connections are loose, reconnect the electrical
connections and repeat step 2.
9. With an ohmmeter, check harness for continuity between
the drain pump (and recirculation pump, on some models)
and main control.
See chart below.
Main Control to Drain Pump (and Recirculation Pump)
Drain Pump Pin 1 to Main Control J4-1 (White Wire)
Drain Pump Pin 2 to Main Control J4-3 (Blue Wire)
Recirc. Pump Pin 1 to Main Control J4-1 (White Wire)
Recirc. Pump Pin 2 to Main Control J4-5 (Lt Blue Wire)
¾ If there is continuity, go to step 10.
¾ If there is no continuity, replace the lower washer
harness and repeat step 2.
10. With an ohmmeter, measure the resistance across the two
pump terminals. Resistance should be as shown in the
chart below:
Component
Drain Pump
Recirculation Pump
¾ If values are open or out of range, replace the pump
motor.
¾ If the resistance at the pump motor is correct, go to
step 11.
11. If the preceding steps did not correct the drain problem,
replace the main control.
a. Unplug washer or disconnect power.
b. Replace the main control.
c. Reassemble all parts and panels.
d. Plug in washer or reconnect power. Perform Service
Diagnostics to verify repair.
W
B
W
26-32 Ω
P
W
A B
Whirlpool & Maytag Direct Drive Top Load Washer
COMPONENT TESTING
Correct Resistance
18-24 W
26-32 W
Figure 1 - Pumps Strip Circuits
MAIN BOARD
J4-1
J12-3
N
W
3-13
n