Maytag Commercial MYR20 User manual

Maytag Commercial
Multi Load Washer
SERVICE MANUAL
MYR20 MYR30
MYR25 MYR40
W11262428
TECHNICAL EDUCATION
MODELS:

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WHIRLPOOL CORPORATION assumes no responsibility
for any repairs made on our products by anyone other than
authorized Commercial Laundry Service Professionals.
Copyright © 2018, Whirlpool Corporation, Benton Harbor, MI 49022
FORWARD
This Service Manual, (Part No. W11262428), provides the Commercial Laundry
Service Professional with information on the operation, and service of the Maytag
Commercial Multi Load Washer. For specic information on the model being serviced,
refer to the “Installation Instructions,” provided with the Multi Load Washer or on the
Service Website. The Wiring Diagrams used in this Service Manual are typical and
should be used for training purposes only. Always use the Wiring Diagram located in
the Tech Sheet supplied with the product, or on the Service Website, when servicing
the Multi Load Washer.
The Service Website is located online at www.serviceconnections.org. For access to
the website or for questions, please contact your Field Service Manager.
GOALS AND OBJECTIVES
The goal of this Service Manual is to provide information that will enable the
Commercial Laundry Service Professional to properly diagnose malfunctions and
repair the Maytag Commercial Multi Load Washer. The objectives of this Service
Manual are to:
• Understand and follow proper safety messages.
• Understand and diagnose improper installations.
• Successfully troubleshoot and diagnose malfunctions.
• Successfully perform necessary repairs.
• Successfully return the Multi Load Washer to its proper operational status.
Phillips is a registered trademark of Phillips Screw Company
Torx is a registered trademark of ACUMENT INTELLECTUAL PROPERTIES, LLC

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Page
TABLE OF CONTENTS
GENERAL................................................................................................................................. 1-1
Washer safety................................................................................................................... 1-1
Model number designations.............................................................................................. 1-2
Serial number designations .............................................................................................. 1-3
Data plate location ............................................................................................................ 1-4
Warranty for vended product ............................................................................................ 1-5
Warranty for on-premise product ...................................................................................... 1-6
INFORMATION & SPECIFICATIONS....................................................................................... 2-1
Rigid model dimensions.................................................................................................... 2-1
Specications.................................................................................................................... 2-2
Bolt torque values ............................................................................................................. 2-6
BASIC OPERATION ................................................................................................................. 3-1
Power................................................................................................................................ 3-1
Door lock........................................................................................................................... 3-1
Water inlet valves.............................................................................................................. 3-2
USB update procedure .....................................................................................................3-3
Chemical injection............................................................................................................. 3-3
Washer maintenance........................................................................................................ 3-4
Belt inspection and adjustment......................................................................................... 3-5
COMPONENT ACCESS ........................................................................................................... 4-1
Top panel open ................................................................................................................. 4-1
Components accessible under the top panel.................................................................... 4-2
Chemical dispenser assembly .......................................................................................... 4-3
Top panel lock................................................................................................................... 4-5
Top panel removal ............................................................................................................4-6
EMI lter............................................................................................................................ 4-7
Drive contactor.................................................................................................................. 4-8
Supply power transformer................................................................................................. 4-9
Supply power switch ......................................................................................................... 4-10
Fuse replace ..................................................................................................................... 4-11
Soap signal board............................................................................................................. 4-12
Variable frequency drive ................................................................................................... 4-13
Water inlet valve repair ..................................................................................................... 4-15
Water inlet valve removal.................................................................................................. 4-16
Control panel open ........................................................................................................... 4-18
Emergency stop button..................................................................................................... 4-19
Coin drop .......................................................................................................................... 4-20
HMI - connections............................................................................................................. 4-21
Human machine interface - removal................................................................................. 4-22
Appliance control unit - ACU - connections ...................................................................... 4-23
Appliance control unit - removal ....................................................................................... 4-24
Wi module ....................................................................................................................... 4-25

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TABLE OF CONTENTS - CONTINUED
Page
Service switch................................................................................................................... 4-26
Door handle ...................................................................................................................... 4-27
Door strike ........................................................................................................................ 4-27
Door and Door hinges....................................................................................................... 4-28
Door glass......................................................................................................................... 4-29
Toe panel .......................................................................................................................... 4-30
Drain valve........................................................................................................................ 4-31
Front panel........................................................................................................................ 4-32
Door lock........................................................................................................................... 4-33
Heating elements.............................................................................................................. 4-34
Ornament panel ................................................................................................................ 4-35
Back panel ........................................................................................................................ 4-36
Lower back panel.............................................................................................................. 4-37
Drive belt........................................................................................................................... 4-38
Temperature sensor.......................................................................................................... 4-38
Speed sensor.................................................................................................................... 4-39
Drive motor ....................................................................................................................... 4-40
Bearing housing................................................................................................................ 4-41
Bearing and basket replacement - Preferred method....................................................... 4-44
COMPONENT TESTING........................................................................................................... 5-1
Component resistance values .......................................................................................... 5-1
Door lock........................................................................................................................... 5-2
Variable frequency drive ................................................................................................... 5-4
Variable frequency drive wiring......................................................................................... 5-6
Drive contactor.................................................................................................................. 5-7
Coin drop acceptor ........................................................................................................... 5-8
DIAGNOSIS AND TROUBLESHOOTING ................................................................................ 6-1
Service diagnostics........................................................................................................... 6-1
Diagnostic cycle chart....................................................................................................... 6-2
Error codes ....................................................................................................................... 6-3
WIRING DIAGRAM................................................................................................................... 7-1
Single phase ..................................................................................................................... 7-1
ALPHABETICAL COMPONENT INDEX .................................................................................. 7-3

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INTERACTIVE SERVICE MANUAL INSTRUCTIONS
View on PC, MAC, iPad, iPhone and Android devices.
Acrobat Reader is available for all devices to open .pdf documents.
Click on any topic in the Table of Contents to go directly to that section.
Click on any link that says (See page ?-?) to go directly to the page referenced.
Click to view the video procedure on YouTube.
VIEW EQUIPMENT & SAFETY VIDEO

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---- NOTES ----

1-1
GENERAL
IMPORTANT
Electrostatic Discharge (ESD)
Sensitive Electronics
ESD problems are present everywhere. ESD may damage or weaken
the electronic control assembly. The new control assembly may appear
to work well after repair is nished, but failure may occur at a later date
due to ESD stress.
• Use an anti-static wrist strap. Connect wrist strap to green ground
connection point or unpainted metal in the appliance
-OR-
Touch your nger repeatedly to a green ground connection point or
unpainted metal in the appliance.
• Before removing the part from its package, touch the anti-static bag
to a green ground connection point or unpainted metal in the
appliance.
• Avoid touching electronic parts or terminal contacts; handle
electronic control assembly by edges only.
• When repackaging failed electronic control assembly in anti-static
bag, observe above instructions.
WASHER SAFETY

1-2
MODEL NUMBER DESIGNATIONS
MODEL NUMBER M YR 30 PD W 0 0 0 0
BRAND
M Maytag
MOUNTING TYPE
YR Rigid Mount
YS Soft Mount
DRY WEIGHT CAPACITY
20 20 lbs / 9.1 kg
25 25 lbs / 11.4 kg
30 30 lbs / 13.6 kg
40 40 lbs / 18.2 kg
55 55 lbs / 25 kg
65 65 lbs / 29.5 kg
PAYMENT METHOD / CONTROL TYPE
PR Card Reader Ready
PD Single Coin Drop Mechanism (US$0.25)
PE Dual Coin Drop Mechanism (CA$0.25/CA$1.00)
PF Electronic Coin Drop Mechanism
PN OPL Control (no payment system)
ELECTRIC POWER CONNECTION
W 120V / 60Hz / 1-Phase (Non-IEC, no electric heat)
T 208-240V / 50/60Hz / 1 Phase (Non-IEC, no electric heat)
S 220-240V / 50/60Hz / 1 Phase (Non-IEC, no electric heat)
V 220-240V / 50/60Hz / 3 Phase (IEC)
N 380-415V / 50/60Hz / 3 Phase (IEC)
R 440-480V / 50/60Hz / 3 Phase (IEC)
ELECTRIC HEAT OPTION CODE
0 No Internal Heating
1 8 kW
2 12 kW
3 16 kW
4 18 kW
PANEL MATERIAL / COLOR OPTION CODE
0 Painted Sides, Stainless Fronts
1 Stainless Sides and Front
EXTERNAL CHEMICAL SIGNAL OPTION CODE
0 No
1 Yes
WATER INLET & DRAIN OPTION CODE
0 2 Inlets & 1 Drain 2 2 Inlets & 2 Drains
1 3 Inlets & 1 Drain 3 3 Inlets & 2 Drains

1-3
SERIAL NUMBER DESIGNATIONS
SERIAL NUMBER MC 7 35 109
DIVISION RESPONSIBILITY
MC Fall River, MA
YEAR OF PRODUCTION
7 2017
8 2018
9 2019
WEEK OF PRODUCTION
35 35th Week in the calendar year
MANUFACTURING SEQUENCE NUMBER

1-4
DATA PLATE LOCATION
Data Plate On Back Panel