PAGE 17
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DES
TROY
If the resistance is within the range shown in the table,
go to step 6.
If the resistance is infinite or close to zero, replace the
temperature thermistor assembly.
NOTE:
Most thermistor errors are a result of the resistor being
out of range. If the temperature thermistor malfunctions, the
washer will default to pre-programmed wash settings.
6.
If the thermistor is good, replace main control and calibrate
washer. Perform Quick Overview Test to verify repair.
TEST #6: Water Level
This test checks the water level sensing components. Depending
on the model, the washer will have either an on-board pressure
transducer or a separate pressure switch.
NOTE:
Usually, if the
pressure transducer or pressure switch malfunctions, the washer
will generate a long fill, or long drain error.
1.
Check the functionality of the pressure transducer or
pressure switch by running a small load cycle. The valves
should turn off automatically after sensing the correct water
level in the tub. The following steps assume that this step
was unsuccessful.
2.
Drain the tub until all water has been removed.
3.
Unplug washer or disconnect power.
4.
Remove console to access controls.
5.
Check hose connection between the pressure transducer
or switch and the pressure dome attached to the tub.
6.
Check to ensure hose is routed correctly in the lower cabinet
and not pinched or crimped by the back panel.
7.
Verify there is no water, suds, or debris in the hose or dome.
Disconnect hose from main control or pressure switch and
blow into hose to clear water, suds, or debris.
8.
Check hose for leaks. Replace if needed.
9.
If the preceding steps did not correct the problem, go to
step 10 if troubleshooting a pressure switch, or step 11 if
troubleshooting an onboard pressure transducer.
10.
Pressure Switch Only:
a.
Remove the pressure hose from the switch.
b.
Place the leads of an ohmmeter across connector J4,
pins 1 & 3 of the main control. Blow into the pressure switch
inlet. The pressure switch contact should close and show
continuity.
If there is no continuity, check the harness and connections
between the pressure switch and J4 on the main control.
If OK, replace the pressure switch.
If there is continuity, reconnect hose to pressure switch
and continue to step 11.
11.
Replace the main control and calibrate washer. Perform
Quick Overview Test to verify repair.
TEST #7: Drain Pump
Perform the following checks if washer does not drain.
NOTE:
Refer to Figure 6, “Drain Pump Strip Circuit” for tests
and measurements.
IMPORTANT:
Drain water from tub before accessing bottom
of washer.
1.
Check for obstructions in the usual areas. Clean and then
perform step 2.
Figure 6 - Drain Pump Strip Circuit
Main Control
Shifter Assy
L1
Main Control
N
J16-3
J7-1
J16-2
Pin 1
Pin 1
Pin 2
Pin 2
J7-3
K7
120VAC
Motor
Motor Resistance 14 to 25 ohms
Drain Pump Motor Relay
Drain Pump Motor
Approx. Resistance
F°
32
41
50
59
68
77
86
95
104
113
122
131
140
149
Approx. Temperature
THERMISTOR RESISTANCE
C°
(KΩ)
163
0
5
127
10
15
20
25
30
35
40
45
50
55
60
65
100
79
62
50
40
33
27
22
18
15
12
10
