Maytag MHW9000YW0 Mode D'emploi page 18

FOR SERVICE TECHNICIAN'S USE ONLY
10. Check the harness between the CCU and
Pressure Sensor for continuity.
 If there is continuity, go to step 11.
 If there is no continuity, repair or replace
as necessary.
11. Plug in washer or reconnect power.
12. With a voltmeter set to DC, connect black
probe to CCU connector PS8, pin 8 (GND) and
red probe to PS8, pin 4 (+5V [Vcc]).
 If +5V DC is present, replace the pressure
sensor.
 If+5V DC is not present, perform TEST
#1: CCU Power Check on page 13.
13. If the preceding steps did not correct the
problem, replace the CCU.
 Unplug washer or disconnect power.
 Replace the CCU.
 Reassemble all parts and panels.
 Perform the "Quick Diagnostic Test"
on page 6 to verify repair.
TEST #8: Drain Pump
Perform the following checks if washer does
not drain.
1. Check for obstructions in the usual areas.
Clean and then perform step 2.
2. Check the drain pump and electrical
connections by performing the "Quick
Diagnostic Test" on page 6. The following
procedures assume that this step was
unsuccessful.
3. Unplug washer or disconnect power.
4. Remove top panel to access machine
electronics.
5. Visually check that the DP2 connector is
inserted all the way into the CCU. Refer to
CCU diagram on page 13.
 If visual check passes, go to step 6.
 If connector is not inserted properly,
reconnect DP2 and repeat step 2.
6. Remove connector DP2 from the CCU.
With an ohmmeter, measure the resistance
across pins 1 and 2.
7. Resistance should be approximately 16 Ω.
 If the reading is infinite (open), go to step 8.
 If the reading is correct, go to step 12.
PAGE 18
8. Remove the front panel to access drain
pump. Verify pump is free from obstructions.
9. Visually check the electrical connections
at the drain pump.
 If visual check passes, go to step 10.
 If connections are loose, reconnect the
electrical connections and repeat step 2.
10. With an ohmmeter, check harness for
continuity between the drain pump and CCU.
 If there is continuity, go to step 11.
 If there is no continuity, replace the lower
machine harness and repeat step 2.
11. With an ohmmeter, measure the resistance
across the two pump terminals. Resistance
should be approximately 16 Ω.
 If the reading is infinite (open), replace the
drain pump assembly.
 If the reading is correct, go to step 12.
12. If the preceding steps did not correct the
drain problem, replace the CCU.
 Unplug washer or disconnect power.
 Replace the CCU.
 Reassemble all parts and panels.
 Perform the "Quick Diagnostic Test"
on page 6 to verify repair.
TEST #9: Flow Meter
This test checks the electrical connections
to the flow meter and the flow meter itself.
1. Perform the "Quick Diagnostic Test" on
page 6. If error code F8E4 is generated, the
washer is detecting less than 0.1L of water
after 30 seconds of starting the test. Go to
step 2.
2. Did the valve(s) turn on and was water
seen and heard entering the drum?
 No, the valve(s) did not turn on. Go to
TEST #6: Water Inlet Valves, page 17.
 Yes, the valve(s) turned on, but no water
entered the drum. Go to step 3.
 Yes, the valve(s) turned on and water
entered the drum. Go to step 4.
3. Verify that the hot and cold water inlet hoses
are properly connected to the washer and the
valves are turned on fully. Ensure the inlet hoses
are not kinked or inlet screens blocked.
DO NOT REMOVE OR DESTROY