PAGE 14
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
Shifter Switch:
9.
With a voltmeter set to
DC
, connect the black probe to
J2-3 (Circuit Gnd) and red probe to J2-1 (Shifter Switch).
In manual test mode, switch between Spin and Agitate
modes. Voltage should toggle between 0 and +5VDC.
SPIN = +5 VDC
AGITATE = 0 VDC
If voltage corresponds to setting, go to step 10.
If voltage does not switch, go to step 12.
Optical Sensor:
10.
With a voltmeter set to
DC
, connect the black probe to J2-3
(Circuit Gnd) and red probe to J2-4 (+13VDC).
If +13VDC is present, go to step 11.
If +13VDC is not present, go to step 17.
11.
Activate Tachometer Verification Mode from the Service
Diagnostic Test Modes (see page 5). Slowly turn the basket
by hand. The 4 status LEDs should illuminate one at a time
to represent basket RPM.
If the tachometer is not verified, go to step 12.
If the tachometer is verified, go to step 17.
12.
Unplug washer or disconnect power.
13.
Tilt washer back to access the bottom of the washer
and the drive motor area.
14.
Visually check the electrical connections to the shifter.
If visual check passes, go to step 15.
If connections are loose, reconnect the electrical connections
and repeat step 1.
15.
With an ohmmeter, check the harness for continuity between
the shifter and main control using the pinouts in the following
chart.
If there is continuity, go to step 16.
If there is no continuity, replace the lower washer harness and
repeat step 1.
16.
Replace the shifter assembly.
a.
Unplug washer or disconnect power.
b.
Replace shifter assembly.
c.
Reassemble all parts and panels.
d.
Plug in washer or reconnect power. Calibrate washer
and perform Quick Overview Test to verify repair.
17.
If the preceding steps did not correct the 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. Calibrate washer
and perform Quick Overview Test to verify repair.
TEST #3b: Drive System – Motor
This test checks the motor, motor windings, wiring, and start
capacitor.
NOTE:
Refer to Figure 5, “PSC Motor Strip Circuit” on page 15
for tests and measurements.
IMPORTANT:
Drain water from tub before accessing bottom
of washer.
1.
Check the motor and electrical connections by performing
the Gentle or Heavy Agitation test under Manual Overview
Test Mode on page 9. The following steps assume that this
step was unsuccessful.
2.
Unplug washer or disconnect power.
3.
Check to see if basket will turn freely.
If basket turns freely, go to step 4.
If basket does not turn freely, determine what is causing
the mechanical friction or lockup.
4.
Remove console to access main control.
5.
Visually check that the J2 and J16 connectors are inserted
all the way into the main control.
Shifter to Main Control & Drain Pump
Shifter Connector Pin-2 to Main Control J16-2
Shifter Connector Pin-3 to Main Control J16-1
Shifter Connector Pin-4 to Main Control J2-4
Shifter Connector Pin-5 to Main Control J2-3
Shifter Connector Pin-6 to Main Control J2-2
Shifter Connector Pin-7 to Main Control J2-1
Figure 4 - Shifter Assembly Strip Circuit (Shifter Switch: Open = SPIN, Closed = AGITATE)
Main Control
Shifter Assy
J2-3
J16-1
J7-1
L1
Main Control
J2-4
J2-2
J16-2
J2-1
Pin 7
Pin 6
Pin 3
Pin 5
Pin 4
Pin 2
J7-3
K8
Circuit Ground
N
+13VDC
120VAC
Motor
Shifter Switch
Optical
Sensor
Shifter Position
Input
RPM Input
Motor Resistance 2k to 3.5k ohms
Shifter Motor Relay
