Troubleshooting Tests - Maytag MGDB800VU0 Instructions Manual

FOR SERVICE TECHNICIAN ONLY - DO NOT REMOVE OR DESTROY

TROUBLESHOOTING TESTS

NOTE: These checks are done with the dryer
unplugged or disconnected from power.
TEST #1 Supply Connections
This test should only be done after confirming
proper voltage at the outlet.
1. Unplug dryer or disconnect power.
2. Remove the cover plate from the back of
the dryer. See figure 3.
3. Check that the power cord is firmly
connected to the dryer's wire harness. See
figure 4.
4. Access the machine control electronics
without disconnecting any wiring to the
control board. See Accessing & Removing
the Electronic Assemblies, page 13.
5. With an ohmmeter, check for continuity
between the neutral (N) terminal of the plug
and P8-3 (white wire) on the machine
control board. The left-hand side of figure 5
shows the position of the neutral terminal
(N) on the power cord plug. Also see the
machine control electronics illustration on
page 15.
If there is continuity, go to step 6.
If there is no continuity, disconnect the
white wire of the harness from the
power cord at the location illustrated in
figure 4. Test the continuity of the power
cord neutral wire as illustrated in
figure 5. If an open circuit is found,
replace the power cord. Otherwise, go
to step 6.
6. In a similar way, check the continuity
between the L1 terminal of the plug and
P9-2 (black wire) on the control board. See
the machine control electronics illustration.
If there is continuity, go to step 8.
If there is no continuity, check the
continuity of the power cord in a similar
way to that illustrated in figure 5 but for
power cord L1 wire.
If an open circuit is found, replace the
power cord. Otherwise, go to step 7.
7. Replace the main harness.
8. Visually check that the P5 connector is
inserted all the way into the machine control electronics.
9. Visually check that the user interface assembly is properly inserted
into the front console.
10. If both visual checks pass, replace the user interface assembly.
11. Plug in dryer or reconnect power.
12. Perform the Console Buttons and Indicators Diagnostic test, page 2,
to verify repair.
13. If indicators still do not light, the machine control electronics has
failed:
Unplug dryer or disconnect power.
Replace the machine control electronics.
Plug in dryer or reconnect power.
Perform the Console Buttons and Indicators Diagnostic test to
verify repair.
TEST #2 Machine Control Power Check
This test is used to determine if power is present at the machine control
electronics.
NOTE: The drum light is controlled by the machine control on all models.
1. Plug in dryer or reconnect power.
2. Open the door.
P A R T N O . W10156734A
Cover Plate
Couvercle
Remove
Screw
Ôter la vis
Remove the cover plate. Enlever le couvercle.
Figure 3
Wire Harness
Câblage
Power cord-to-wire Raccordement entre cordon
harness connection. d'alimentation et câblage de
Figure 4
Power Cord Plug
Fiche de branchement
N
Neu COM
L1
G
Masse
G
Masse
Plug-to-terminal Branchement pour contrôle
connections.
Figure 5
P A
POUR LE TECHNICIEN SEULEMENT - NE PAS ENLEVER NI DÉTRUIRE
Power Cord
Cordon
d'alimentation
la sécheuse.
L1
N
Neu
de la continuité.
G E 6
o
P I È C E N W10156734A