Midea MDV160-V042/F01-SA User manual

Service Manual
Dryer
Model:MDV160-V042/F01-SA
Note：
Before service the unit, please read this manual first.
Contact with your service center if meet problem

1 PRECAUTION………………….………………..……………………………………………………….3
1.1 Safety Precautions
1.2 Servicing Precaution
1.3 Cautions For Safety
2 UNPACKING WAYS OF MAIN PARTS…………………………………………………………..5
3 MALFUNCTIONS CODES AND EXPLANATIONS …………………………………...…..13
4TROUBLESHOOTING………………………………………………………………………..………14
4.1 Will not start or run
4.2 Motor runs/ tumbler will not turn
4.3 Runs a few minutes and then stops
4.4 Blows fuses or trips circuit breaker
4.5 Will not heat (motor runs)
4.6 Improper drying clothes wrinkled Rough texture long dry time
4.7 Noisy and / Or Vibration
5 CHECK POINT OF CIRCUIT ……………………………………………………………….…….. 17
6SERVICE TOOLS……..………………..................................................................18
7APPENDIX………………………………………………………………………………………..……..19
Contents
2

1 Precaution
3
When performing troubleshooting and part replacement during servicing, note the following safety
precaution.
1-1.Safety Precautions
1-1-1.Use Genuine Parts
The components of the Tumble Dryer machine have safety features such as non-combustibility and
voltage withstanding. Therefore, always use the same part as suggested by the maker. In particular,
be sure to use only designated parts in case of major safety parts identified by the marker.
1-1-2.Grounding
Connect the grounding wire to the shell plate, and bury it under at least 25cm of earth:
alternatively, connect the ground wire to the appropriate pin on a properly grounded power
receptacle. Never connect the wire to a telephone line, lightning rod, or gas pipe.
1-2. Servicing Precautions
1-2-1. Observe Warnings
Be sure to follow special warning and precautions that are described on part labels and in the
owner’s manual.
1-2-2. Parts Assembly and wiring
Be sure to use insulation material (such as tube and tape). And be sure to restore all parts and wires
to their original position. Take special care to avoid contact with sharp edges.
1-2-3 Perform Safety Checks after Servicing
After servicing, check to see that the screws, parts, and wiring are restored to their original
positions, and check the insulation between the external metals and the socket plug. In addition,
place the Tumble Dryer machine in a level position (less than 1(one) degree) to prevent vibration
and noise during operations.
1-2-4.Insulation Checks
Pull out the plug form the power receptacle, pour water into the spin tub, and then set the timer.
Check to see that the resistance insulation between the terminals of the plug and the externally
exposed metal is greater than 1M.
Note: When it is impossible to perform insulation check with a 500V insulation resistance tester,
use other testers for inspection.

1.3 Cautions For Safety
Symbol
Meaning
WARNING
Indicates possibility of death or serious injury of a repair technician and a
person nearby through the misconducted work, or of a user by a defect of
the
product after the work performed by the technician.
CAUTION
Indicates possibility of injury or physical damages* of a repair technician and
a person nearby through the misconducted work, or of a user by a defect of
the product after the work performed by the technician.
Graphic Symbol
Meaning
Caution : Read
the operator’s manual before using this product!
caution, hot surface
caution, risk of fire
UNPLUG
POWER
Unplug power cord for the work such as disassembling which is not
unnecessary to power on . Do not hold the plug by a wet hand. Failing to
unplug may cause an electric shock.
•Please observe the following notes for safety.
•The symbols indicate as follows.
4
1 Precaution

5
Ordinary Information
1.Please unplug the power cord when you disassemble or maintain the product；
2.Please use the regulation connector lug between the wires as much as possible. Then crimp
them firmly by the proper tools and bundle them by the insulating tape;
3.When you plug the wires, please insert the plug to the bottom so it is not easily to be
unplugged;
4.Make sure that the wires cannot touch the mobile part such like the drum, and also cannot
touch the sharp/hard-edged party and high-heat part (motor);
5.Please preserve the screws when you take them down. You will use them when you install
the dryer;
6 6.ometimes you must operate the dryer when it is electriferous. In this case, you must be
careful and pay attention to the electric shock.
2 Unpacking Ways Of Main Parts

6
2 Unpacking Ways Of Main Parts
Steps of disassembling machine Pictures
1.Remove the control panel
1.1 Remove the screws
that is used to fix the control
panel;
1.2
Remove the screws on the electrical box;
1.3
Flip the electrical box;
1.4
Pull out the terminals;
1.5 Take down the PCB kit.
2. Remove the top cover
2.1 Remove three screws behind the top cover;
2.2 Push off the top cover
3. Take down the back air outlet
3.1 Remove the screw that is used to fix the back air
outlet;
3.2 Pull out the rear vent pipe;
4. Remove the back cover
4.1 Remove the screws that is used to fix power line;
4.2 Pull out the terminals;
4.3 Remove the screws on the back cover;
4.4 Take down the back cover;

7
Steps of disassembling machine Pictures
5. Take down the tumble
assy;
5.1 Remove the screws;
5.2 Take down the belt from the Motor;
5.4 Hold the belt and take down the tumble
assy;
6. Remove the heater
assy
6.1 Pull out all the terminals;
6.2 Remove the screw that is used to fix the heater
assy
;
6.3 Take down the heater
assy;
6.4 Remove the thermostat;
7. Remove the Door
assy
7.1 Remove the screws on the Door Hinge and Take
down the Door
assy;
8. Remove the Door Hinge
9.
Remove the Door seal
2 Unpacking Ways Of Main Parts

8
Steps of disassembling machine Pictures
10.
Deleave the Door assy
10.1 Remove all 12 screws around the door.
10.2 Depart the door front and back.
11. Remove the door lock.
Take care the slots.
12. Remove the Door Hook
13. Remove the Front Cover
13.1 Remove the screws that is used to fix the Front Cover;
13.2 Take down the Front Cover;
13.3 Pull out the terminals connecting to the Front Cover;
2 Unpacking Ways Of Main Parts

9
Steps of disassembling machine Pictures
14. Take down the Lint Filter
15. Pull out the terminals as shown on the fig.
16. Remove the screws as shown on the fig.
17. Remove the air flow channel
assy
18. Remove the temperature sensor
19. Remove the temperature switch
2 Unpacking Ways Of Main Parts

10
Steps of disassembling machine Pictures
20. Remove the belt switch.
21.
Remove the idle wheel.
22. Remove the motor and fan assy.
2 Unpacking Ways Of Main Parts

11
Steps of disassembling machine Pictures
23. Remove the fan
23.1 the screws that is used to fix the Fixed Sheet
Assembly;
23.2 Remove the Fixed Sheet Assembly.
24. Remove the motor.
25. Remove the wheels supporting the drum.
2 Unpacking Ways Of Main Parts

P1 display communication
P2 TEMP
P3 HUM
P4 Lamp
P5 Heater
P6 Door switch
P7 Motor
P8 Heater
12
2 Unpacking Ways Of Main Parts
P6
P3
P2
P1
P8
P4
P5
P7

13
P1
P3
P2
P4
P5
3 Malfunctions Codes And Explanations

14
4 Troubleshooting
No
Problem
What To Do
1 Will not start or run
●
All wires are hooked up to their corresponding terminals.
●
Dryer is plugged in.
●
Blown fuse or circuit breaker.
●
Door switch functional…door closed.
●
Star/Pause button rotary selector dial functional.
●
Control Board operational.
●
Belt off or broken and Belt Cut-off Switch operates.
●
Drive motor functional.
●
Check motor winding resistance: 2.88 ohms between pin #3 and 4, 3.5
ohms between pin #4 and 5.
2
Motor runs/ tumbler
will not turn
●
Belt off or broken/ damaged.
●
Idler tension spring too weak or stretched.
●
Idler pulley jammed or stuck.
3
Runs a few minutes
and then stops
●
Lint buildup around drive motor.
●
Low voltage present.
●
Blower impeller blocked in blower housing.
●
Drive motor –start switch contacts stuck closed.
●
Check if manual thermostat tripped---- press the red button on
the
thermostat
to restart the dryer (Clean filter and exhaust duct to prevent
it
happen
again)
4
Blows fuses or trips
circuit breaker
●
Is the belt connected well?
●
Is the winding of the motor continuous?
(Rotor winding, stator winding, generator)
●
Is the motor protector normal?
●
If above points are not found, the PCB assembly is out of order.
Replace it.
5
Will not heat (motor
runs)
Open heating element
●
Hi-Limit trips easily or is open.
●
Regulating thermostat trips easily or is open.
●
Membrane switch open.
●
Check thermistor.

15
4 Troubleshooting
No
Problem
What To Do
6
Improper drying
clothes wrinkled
Rough texture long
dry time
●
Lint filter is not clean.
●
Restriction in exhaust.
●
Outside exhaust hood damper door stuck closed.
●
Exhaust too long, too many elbows, flex ductwork installed.
●
Poor intake air available for the dryer.
●
Incorrect tumbler speed. Tumbler belt slipping.
●
Blower impeller bound; check for foreign material in blower area.
●
Customer overloading dryer.
●
Check clothing labels for fabric content and cycle selected.
●
Clothes too wet due to insufficient spin out by washer.
7
Noisy and / Or
Vibration
●
Thumping Check for loose tumbler baffle, rear tumbler roller(s) worn or
misaligned, out
-or-round tumbler or high weld seam on tumbler.
●
Ticking Check for loose wire harness or object caught in blower wheel
area.
●Scraping Check for front or rear bulkhead felt seal out of position or worn
tumbler front bearings.
●
Roaring Check for blower wheel rubbing on blower housing or bad motor
bearings.
●
Popping or squealing sound. Check for a sticky or frayed belt.

Before repairing, use multimeter to judge circuit stand of fail.
5 Check Point Of Circuit
16
No Parts picture parameter
1
Thermostat
●
Thermostat 1 resistance < 1Ω
- If resistance is infinity, replace
Thermostat 1.
●
Thermistor resistance 40KΩ @30℃
50KΩ @25
℃
99KΩ @10
℃
- If resistance is infinity, replace
Thermistor.
2
Heater
Thermostat 3 resistance < 1Ω
- If resistance is infinity, replace
Thermostat 3.
●
Thermostat 2 resistance < 1Ω
- If resistance is infinity, replace
Thermostat 2.
●
Heater resistance 20Ω
- If resistance is infinity, replace Heater.
3
Door switch
●Measure resistance of the
following terminal (Electronic & GAS)
(1) Door switch: open
Terminal: “COM”
– “NO” (1-2): ∞Ω
●Measure resistance of the following
terminal
(2) Door switch push: On
Terminal: “COM”
– “NO” (1-2): < 1Ω
4
Belt Cut
-off
Switch
-Lever open: Resistance value < 1Ω
-Lever push: Resistance value: ∞Ω

Before repairing, use multimeter to judge circuit stand of fail.
5 Check Point Of Circuit
17
No Parts parameter
5
Motor
●
Centrifugal Switch (Motor)

18
5 Service Tools

19
7 Appendix
19
Machine function description, program description, the whole detailed parameter table,
fault codes, etc. Please refer to the instructions.
Note: The schedule for the reference value.

20
The end!