TECH SHEET - DO NOT DISCARD
PAGE 11
FOR SERVICE TECHNICIAN'S USE ONLY
PART NO. 3954702 REV. A
Pin T
Pin P
Pin V
Locking tab for
pressure switch.
Push in here and
rotate switch to
remove switch.
Figure 7
➔
Press START.
➔
After the tub fills, press STOP/CANCEL once.
➔
NOTE: Ensure proper hose connections and
household's hot water presence.
➔
Measure the water temperature. At the WARM
setting, a temperature range of 90° - 110° F indicates
proper operation.
■
If the temperature is not within this range, check the
Automatic Temperature Control sensor as follows:
➔
Remove connector P13 from the control board.
➔
Measure the resistance between P13-7 and P13-8 at
the wire harness connector. The resistance should be
between 74 k
Ω
and 24 k
Ω
.
➔
If resistance is not within this range, check for
continuity between the connector and sensor. If
continuity is good, replace the log valve assembly.
■
If fill valves and temperature sensor are functioning
properly, replace the machine control board.
TEST #6
Operating and Flood Pressure Switch
Test
■
Check the hose connections between each pressure
switch in the console and the pressure dome attached
to the tub.
■
If hose connections are good, check the Operating
Pressure Switch as follows:
➔
Press HEAVY DUTY then START to start a cycle. Let
the unit fill and see if the operating pressure switch
turns off the water.
➔
Check the voltage across pins P and V of the
Operating Pressure Switch. If 12 VDC is present, the
water level pressure has opened the switch. See
Figure 7.
➔
If no voltage is present and the water has filled the
tub to a visible level (above the nutate plate), stop the
cycle and replace the Operating Pressure Switch.
■
To check the Flood Pressure Switch:
IMPORTANT – PERFORM THE FOLLOWING STEPS
IN THIS ORDER:
➔
Pull the hose off of the Operating Pressure Switch so
that the washer can fill beyond the Operating Switch
trip point.
➔
Press HEAVY DUTY then START to start a cycle. Let
the unit fill and see if Flood Pressure Switch will trip.
➔
Check the voltage across pins P and V of the Flood
Pressure Switch. If 120 VAC is present, the water level
pressure has opened the switch. This should also
shut off the water inlet valves and give an FL
indication on the 7-segment display.
➔
If no voltage is present and the water has filled the
tub to an over fill level, stop the cycle and replace the
Flood Pressure Switch.
➔
Reconnect the pressure switch hoses and drain out
the water by starting an EXTENDED SPIN cycle.
TEST #7
Drain/Recirculation Test
Perform the following checks if unit fails to drain or
recirculate.
■
Check power to the unit per Test #1.
■
Refer to Test #3 and check the pump connection (P5) to
the motor controller.
■
Check pump motor windings by removing connector P5
from the motor controller board. Check for resistance
values shown in Table 7.
TABLE 7
WINDING
RESISTANCE CONTACTS MEASURED
RECIRCULATE to NEU
11.1 Ohms P5-3 (RD/BU) P5-1 (WH)
DRAIN to NEU
11.1 Ohms
P5-2 (TN/YL) P5-1 (WH)
RECIRCULATE to DRAIN 22.2 Ohms P5-3 (RD/BU) P5-2 (TN/YL)
■
If the winding measurements are much higher (tens of
Ohms to infinity) than shown in Table 7, a problem exists
in the motor winding or in the connection between the
control board and the motor. Check the resistance at the
pump motor. Remove the connector at the motor, and
take measurements as shown in Table 8.
TABLE 8
WINDING
RESISTANCE CONTACTS MEASURED
RECIRCULATE to NEU
11.1 Ohms
RD
WH
DRAIN to NEU
11.1 Ohms
YL
WH
RECIRCULATE to DRAIN
22.2 Ohms
RD
YL
■
If the winding measurements are much higher (tens of
Ohms to infinity) than shown in Table 8, replace the
pump motor.
■
If the resistance at the pump motor is correct, there is an
open circuit in the wiring between the motor and control
board. Repair or replace the lower wiring harness.
■
If pump motor windings and motor control board check
OK, repair or replace the pump. Be sure to check the
pump and tub sump for foreign objects before replacing
pump.
