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FOR SERVICE TECHNICIAN ONLY - DO NOT REMOVE OR DESTROY

PART NO. W10340707A

PAGE 8

ACCU

TRAC

®

WASHER

INDICATION DISPLAY

EXPLANATION AND RECOMMENDED PROCEDURE

PUMP DISCONNECTED

The electrical connection between the pump and the
CCU is lost.

Possible Causes

– Poor connection between CCU (DP2) and drain

pump.

– Pump thermal overload caused by the pump

running for an extended period of time.

Procedure

1. Clear error code.
2. Unplug the washer or disconnect power.
3. Check electrical connection between pump and

CCU (DP2) (see page 14).

4. Check the pump using a diagnostic mode.
If all of the above are OK and the pump still does not
run, replace the CCU.

LOAD DETECTED IN WASHER
DURING WASHER CLEANOUT CYCLE

The washer detects a load inside the washer tub
at the beginning of the Washer Cleanout Cycle.

Possible Causes

– Load inside the washer during the Washer

Cleanout Cycle.

– Friction between the drum and bellows material.

Procedure

1. Clear error code.
2. Unplug the washer or disconnect power.
3. Remove clothes from washer drum.
4. Verify that misalignment of the spin basket and the

T bearing on the boot is not causing friction (which
is interpreted by the motor as a load in the washer).

If bellows adjustment does not correct the friction issue,
the spin basket will need to be replaced.

COMMUNICATION FAILURE
BETWEEN CCU AND UIC

Communication between Central Control Unit (CCU)
and User Interface Control (UIC) has failed.

Possible Cause

– Electrical connection between CCU and UIC

is damaged.

Procedure

1. Clear error code.
2. Unplug the washer or disconnect power.
3. Verify that the communication cable is connected

in the upper connector of the UIC.

4. Verify continuity in the cable between the CCU

and the UIC.

If, after these procedures, the continuity test fails,
replace the communication cable. If F70 is still
present, replace the UIC.

d

1 5

F 3 4

d

1 4

F 3 3

ACCU

TRAC

®

WASHER

INDICATION DISPLAY

EXPLANATION AND RECOMMENDED PROCEDURE

DOOR UNLOCK ERROR

The door is unable to unlock after 6 tries.

Possible Causes

– Misaligned or broken door latch.
– Electrical connections from CCU (DLS2, DL3)

to door lock are damaged.

– Misaligned, broken, or overtightened door hook.

Procedure

1. Clear error code.
2. Unplug the washer or disconnect power.
3. Manually unlock the door (page 14).
4. Make sure that the latch is secured to the front panel.
5. Check for misaligned, broken, cracked, or loose

door hook.

6. Check the electrical connections between CCU

(DLS2, DL3) and latch (see page 14).

If the latch fails to unlock after checking all of the
above, replace the latch.

OVERHEATING OF MOTOR

The heat sink exceeds 212°F (100°C). If this condition
is met, the CCU resets the MCU, then waits for the
motor to cool down before restarting the motor.
This procedure can repeat up to 4 times before F31
is displayed.

Possible Causes

– Improper installation of washer.
– Poor electrical connection from CCU (MS2) to MCU.

Procedure

1. Clear error code.
2. Unplug the washer or disconnect power.
3. Verify the washer is not located near a source

of heat and has proper ventilation.

4. Check the electrical connections between CCU

(MS2) and MCU.

5. Verify the drive motor operation in diagnostic mode.
If, after the above tests, the motor overheats, replace
the MCU.

d

1 9

F 2 9

d

1 0

F 3 1

d

2 3

F 7 0

Summary of Contents for MHN30PD

Page 1: ...his condition will be stored in escrow but cannot be used until normal operation is restored by opening and closing the door If a door switch fails it must be replaced before normal operation can be restored Cold Start initial first use Washer is programmed at the factory as follows 11 minute wash period 3 rinses extra rinse not enabled 1 75 wash price PD models 0 00 wash price PN models Warm Star...

Page 2: ... PRICE Represents the number of coins coin 1 needed to start the washer may adjust from 0 39 See VALUE OF COIN 1 Advance from 0 39 by pressing the PERMANENT PRESS button Factory default of 7 x coin 1 PN MODELS ONLY Factory default of 0 coins With coin slide activation this represents the number of push in actuations of a coin slide to start the washer 6 01 setting would represent one coin slide ac...

Page 3: ...s the value of coin 2 in the quantity of 5 increments of the larger coin value 20 x 5 100 By pressing the PERMANENT PRESS button there is the option of 1 199 for the quantity of 5 increments PN MODELS This represents the value of coin 2 in the quantity of 5 increments of the larger coin value Factory default 5 x 5 of the larger coin value Press the DELICATES AND KNITS button once to advance to nex...

Page 4: ...t for 800 rpm Press the DELICATES AND KNITS button once to advance to next code PENNY INCREMENT OFFSET This option is not supported for non North American models and the value must be set to 00 Press the DELICATES AND KNITS button once to advance to next code PREWASH LENGTH This is the number of minutes of PREWASH Choose 0 to disable the prewash or select between 2 and 7 minutes by pressing the PE...

Page 5: ... press and hold the QUICK CYCLE button for 1 second while in set up code 6xx anytime a diagnostic code is present or while dAS displays if operating with Maytag Data Acquisition set up On entry to diagnostic mode the entire display will flash a cycle in process is canceled money in escrow is cleared and diagnostic codes are cleared If a diagnostic code persists it must be corrected before the foll...

Page 6: ...recommended height Poor connection between CCU DP2 and drain pump Procedure 1 Clear error code 2 Unplug washer or disconnect power 3 Make sure the drain hose is not sealed in the standpipe 4 Make sure the drain height is not more than 8 ft above the base of the washer 5 Check the drain hose and make sure it is not plugged or kinked 6 Check the drain pump for foreign objects 7 Check the electrical ...

Page 7: ...bols page 13 or continuity test at CCU DCS3 connection If the door switch circuit fails to open or close replace the door latch FOR SERVICE TECHNICIAN ONLY DO NOT REMOVE OR DESTROY PART NO W10340707A PAGE 7 d 1 2 F 25 d 4 F 26 ACCU TRAC WASHER INDICATION DISPLAY EXPLANATION AND RECOMMENDED PROCEDURE OVERFLOW CONDITIONS The overflow contact on the pressure switch is closed for more than 60 seconds ...

Page 8: ... Unplug the washer or disconnect power 3 Verify that the communication cable is connected in the upper connector of the UIC 4 Verify continuity in the cable between the CCU and the UIC If after these procedures the continuity test fails replace the communication cable If F70 is still present replace the UIC d 1 5 F 34 d 1 4 F 33 ACCU TRAC WASHER INDICATION DISPLAY EXPLANATION AND RECOMMENDED PROCE...

Page 9: ...low 90vac for 8 seconds Possible Causes Voltage drop due to multiple washers on same circuit Worn outlet Procedure 1 Clear error code 2 Unplug the washer or disconnect power 3 Check the wire harness connection between the RFI filter and the transformer If the above procedures do not solve the problem replace the UIC d 3 F 73 F 74 ACCU TRAC WASHER INDICATION DISPLAY EXPLANATION AND RECOMMENDED PROC...

Page 10: ...ode Display Mode This mode can be accessed only when the washer is in error state For PD Models Open the service door The current F code or d code will be displayed If the washer is showing an error code consult FAILURE ERROR DISPLAY CODES page 5 For PN Models Remove the AA1 connector from the UIC board or insert a manual diagnostic card Enter the Service Access Code see Service Access Code sectio...

Page 11: ...ng at Motor 5 MCU wash speed Motor control MCU Hardware Version 30 sec Bright 6 UIC Drain pump is ON Drain pump EEPROM Version Pressure switch Colors 7 UIC Drum rotates Motor Software Version counter clockwise Motor control MCU and ramps up Drain pump on Permanent Press Performs unbalance procedure before and after spinning If not interrupted the drum will slow and stop after reaching 0 rpm the do...

Page 12: ...ce door Press the DELICATES AND KNITS button until the display reads 2 XX Press the PERMANENT PRESS button Press the DELICATES AND KNITS button to move to the next option see Help Mode Submenu If the washer displays an error code consult the Code Display section page 10 b Accessing the Help Mode in dAS Mode Open the service door or insert a manual diagnostic card The message dAS will appear in the...

Page 13: ...yed in the MANUAL BUTTON FUNCTION IN DIAGNOSTIC SUB MODE The values 255 and 254 are reserved numbers for specific cases 255 unbalance has not been calculated yet 254 unbalance could not be calculated FOR SERVICE TECHNICIAN ONLY DO NOT REMOVE OR DESTROY PART NO W10340707A PAGE 13 Help Mode Submenu This sub menu consists of 14 steps To change to the next step press the DELICATES AND KNITS button To ...

Page 14: ...s NOTE Be sure to perform the Diagnostic Tests before replacing the control board Primary Black to black 220 ohms White to white 3 ohms Green to green 1 2 ohms The number 1 pin has been marked on the bottom part of the connector An infinity measurement occurs when the multimeter does not detect an ohm reading CCU Wire Harness Connector Table Unplug washer or disconnect power before taking ohm meas...

Page 15: ...if L_moussage excessif 22 24 26 21 11 14 p 3 2 1 5 3 6 1 2 3 AA6 AA1 Service Contacteur du service Connecteur du lecteur de carte Contacteur du coffre Switch Coin Vault Switch 1 4 2 3 AA4 1 4 2 3 AA5 1 2 3 1 2 3 4 5 6 AVAIL 2 AVAIL 1 ENABLE 1 ENABLE 2 DEBIT POWER DEBIT GROUND Card Reader Connector 1 2 3 4 NC NC USER INTERFACE CONTROL Interface utilisateur EE1 Battery Optional Pile en option Moteur...

Page 16: ...o operate replace it Procedure if door switch is disconnected In this error the keypad works normally in set up mode but will not start a user paid cycle 1 Verify door switch operation by performing test for F26 error code page 7 even if the F26 code is not displayed If the above procedures fail to solve the problem replace the UIC WASHER VIBRATES 1 Verify that the washer is level 2 Verify that th...

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