Whirlpool WTW7120HC Manual De Instrucciones página 18

THERMISTOR RESISTANCE
Approx. Temperature
°F
32
41
50
59
68
77
86
95
104
113
122
131
140
149
➢ 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 valve assembly.
NOTE: Most thermistor errors are a result of the resistance 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 perform step 1 again
to verify repair.
TEST #6: Water Level
This test checks the water level sensing components.
NOTE: Usually, if the pressure transducer malfunctions, the washer will
generate a long fill, or long drain error (F8E1 or F9E1).
1. Check the functionality of the pressure transducer by running by
running the Water Level Pressure Sensor cycle within Service Sensor
Feedback.
2. Verify that the valves open and the basket begins to fill. The screen
should display the water level rising as the basket fills, then decreasing
as the basket drains.
NOTE: The water level in the basket might not raise high enough to be
visible but that is normal.
3. If step 2 behaves correctly skip to step 9, otherwise continue to step 3.
4. Unplug washer or disconnect power.
5. Remove console to access main control.
6. Check hose connection between the pressure transducer on the main
control and the pressure dome attached to the tub.
7. Check to ensure hose is routed correctly in the lower cabinet and not
pinched or crimped inside the console or by the back panel.
8. Verify there is no water, suds, or debris in the hose or dome.
Disconnect hose from main control and blow into hose to clear water,
suds, or debris.
9. Check hose for leaks. Replace if needed.
10. If the preceding steps did not correct the problem, replace main control
and perform Service Diagnostics. Run Water Level Pressure Sensor
cycle within Service Sensor Feedback to verify.
18
FOR SERVICE TECHNICIAN'S USE ONLY
Approx. Res.
°C KΩ
0 163
5 127
10 100
15 79
20 62
25 50
30 40
35 33
40 27
45 22
50 18
55 15
60 12
65 10
TEST #7: Drain Pump & Recirc. Pump (on some models)
Perform the following checks if washer does not drain.
IMPORTANT: Drain water from tub before accessing the bottom of the
washer.
1. Check for obstructions in the usual areas. Clean and then perform step 2.
2. Check the drain pump (and recirc. pump, on some models) and
electrical connections by turning on the drain pump (and recirc. pump,
on some models) in Service
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 J15 connector is inserted all the way into the
main control.
➢ If visual check passes, go to step 6.
➢ If connector is not inserted properly, reconnect J15 and repeat step 2.
6. Remove connector J15 from main control. With an ohmmeter, verify
resistance values shown below across the following J15 connector
pinouts:
Component J15 Pinout
Drain Pump J15, 1 & 2
Recirc. Pump J15, 1 & 3
➢ If values are open or out of range, go to step 7.
➢ If values are correct, go to step 11.
7. Tilt washer back to access drain pump (and recirc. 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 recirc. pump).
➢ If visual check passes, go to step 9.
➢ 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 recirc. pump, on some models) and main control. See chart below:
Main Control to Drain Pump
Drain Pump Pin 1 to Main Control J15-2 (Pink Wire)
Drain Pump Pin 3 to Main Control J15-1 (White Wire)
Recirc. Pump Pin 1 to Main Control J15-3 (Blue Wire)
Recirc. Pump Pin 3 to Main Control J15-1 (White Wire)
➢ If there is continuity, go to step 10.
➢ 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
Recirc. Pump
➢ If values are open or out of range, replace the pump motor.
➢ 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.
Component Activation Mode. The following
Resistance
17.8 - 21.8 Ω
26 - 32 Ω
Resistance
17.8 - 21.8 Ω
26 - 32 Ω
DO NOT REMOVE OR DESTROY