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Maytag MGDB765FW Dryer
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Maytag MGDB765FW Sécheuse
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Popular Maytag MGDB765FW Manual Pages
W10240504 - Page 7
.... If electric (Fuel = Electric): The UI will continue
to a 3-phase service with reduced wattage that will report findings per the "Gas Dryer Results Display" section where Heater Voltage is available
and Airflow is available at the UI.
FOR SERVICE TECHNICIAN'S USE ONLY
SERVICE TEST MODE CHART
Step #
Action
Component
User Interface Response
1
User enters...
W10240504 - Page 8
...Gas Dryer Results Display" section where Heater Voltage is available
and Airflow is optimized for "ServiceTimeout" or pressing of POWER to go to display as in step 6. Airflow Display
Value
0 1 2 3 (Default)
Setting...3-phase service with reduced wattage that will be displayed as: "0:00". Status_Airflow = 3 will decrease dryer performance. Motor On/Off
The update for ...
W10240504 - Page 10
....
UI Cannot Hear ACU • Unplug dryer or disconnect power.
This fault code will only appear when in the service diagnostic mode. FOR SERVICE TECHNICIAN'S USE ONLY
SERVICE FAULT/ERROR CODES
CODE DESCRIPTION
EXPLANATION AND RECOMMENDED PROCEDURE
F1E1 Motor Relay Stuck On
Indicates an ACU problem. • Replace the ACU.
See TEST #5: Moisture Sensor...
W10240504 - Page 11
FOR SERVICE TECHNICIAN'S USE ONLY
TROUBLESHOOTING GUIDE
PROBLEM WILL NOT POWER UP -
Connection problem between ACU and UI.
Door not fully closed , then press and hold the START button. See Test #7: Door Switch, page 22. Poor airflow. ACU problem.
User Interface problem.
Motor problem.
ACU problem.
Heater coil shorted. Heater system problem. Moisture Sensor ...
W10240504 - Page 12
... 7.
7. With voltmeter set to DC, unplug connector P2 from the ACU and connect black probe to ACU P2-3 (ground) and red probe to access the machine electronics.
4. THERMISTORS
OUTLET THERMISTOR NC NC
P14-6 R/W OUTLET THERMISTOR P14-5 BLK MODEL RTN (GAS MODEL) P14-4 BLK MODEL (GAS MODEL)
Motor Relay
P13
Heater - FOR SERVICE TECHNICIAN'S USE ONLY
TROUBLESHOOTING TESTS
IMPORTANT: The...
W10240504 - Page 13
... (black wire) on the terminal block. Unplug dryer or disconnect power.
2.
Unplug dryer or disconnect power. 2. Perform steps under "Service Test Mode", page 6, to step 4. 4. Installations): 1.
With an ohmmeter, check for electric dryer.
5. ELECTRIC DRYER (Canadian Installations): 1. Unplug dryer or disconnect power.
9.
If acceptable, replace the UI.
8. COM
Figure 4a - Plug...
W10240504 - Page 14
...necessary to replace the power cord, remove the retaining clip that ALL connectors are fully inserted into the UI. Reassemble all parts and panels.
9. Plug in figure 6. GAS DRYER (U.S. Also...dryer or disconnect power.
2. Access the machine electronics without disconnecting any wiring to verify repair. Visually check that ALL connectors are fully inserted into the UI.
8. FOR SERVICE...
W10240504 - Page 15
... "Service Test Mode", page 6, to remove console, top panel, toe panel, and front panel/ drum assembly). The following items are part of this motor system:
Part of 1 to 6 Ω, replace the machine control electronics.
Otherwise, go to the appropriate wiring diagram (gas or electric), pages 24 or 25. Check the wiring and components in dryer...
W10240504 - Page 16
...Gas valve assembly Centrifugal switch Outlet thermistor Machine control electronics Console electronics and housing assembly Gas supply
Electric Dryer
no
ü ü ü
ü
Gas Dryer... the resistance at the motor. Door switch problems can be done without applying power to ... repair the wiring harness.
8. TEST #4: Heat System
This test is much greater than 4 Ω, replace the...
W10240504 - Page 17
...dryer, viewed from front.
4. Thermal components, gas dryer, viewed from front. If the connections look good, check for continuity across the heater (red wire to black wire). If the connections look good, check for continuity across the high limit thermostat.
Replace... to access thermal components.
3. FOR SERVICE TECHNICIAN'S USE ONLY
Dryer does not heat: Locate the components ...
W10240504 - Page 18
... temperatures and their associated resistance values.
Unplug dryer or disconnect power.
2. Go to step 5.
5. Reassemble all parts and panels.
9. GAS DRYER ONLY:
1.
Repair or replace if necessary.
5. Plug in dryer or reconnect power. Unplug dryer or disconnect power. The following table on ACU.
Unplug dryer or disconnect power.
3. Measure the continuity through...
W10240504 - Page 19
... ACU. If the ohmmeter indicates an open circuit, replace the thermal fuse. TEST #4d: Gas Valve (Gas Dryer)
1.
If the preceding steps did not correct the problem, replace the ACU.
Unplug dryer or disconnect power.
2. For thermal cut-off temperature
If the temperature is wired in series with temperature setting, replace the outlet thermistor.
If the temperature...
W10240504 - Page 20
... power.
7.
Reassemble all parts and panels.
12.
Remove console to verify repair.
if not, replace coils.
10. Perform steps under "Service Test Mode", page 6, to access the machine electronics.
3. Measuring gas valve resistance.
4. Using an ohmmeter, measure the resistance across the terminals (see figure 11). Resistance should match those shown in dryer or reconnect power...
W10240504 - Page 25
Wiring Diagram, Gas
IMPORTANT: Electrostatic discharge may cause damage to machine control electronics. DO NOT REMOVE OR DESTROY
GAS DRYER WIRING DIAGRAM PAGE 25
See page 1 for ESD information. FOR SERVICE TECHNICIAN'S USE ONLY
Figure 15 -
W10240504 - Page 26
... Start
Run
= Contacts closed
Centrifugal Switch (Motor)
Black Light Blue
White
White Light Blue
Gas Valve, Gas Dryer
Lt. FOR SERVICE TECHNICIAN'S USE ONLY
COMPONENT LOCATIONS
• ACU (beneath console) • User Interface (UI)
Door Switch (Location may vary between models)
• Drum Light Assembly • Thermal Cut-off • High Limit Thermostat • Heater...
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