Maytag Commercial MHN30PN User Manual

FOR SERVICE TECHNICIAN ONLY - DO NOT REMOVE OR DESTROY
PART NO. W10340707A PAGE 1
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 finished,
but failure may occur at a later date due to ESD stress.
■
Use an anti-static wrist strap. Connect wrist strap to green
earth connection point or unpainted metal in the appliance.
-OR-
Touch your finger repeatedly to a green earth connection point
or unpainted metal in the appliance.
■
Before removing the part from its package, touch the anti-
static bag to a green earth 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.
BASIC OPERATION OF EXPORT COMMERCIAL FL
WASHER, STARTING WITH MODEL 30
■
For additional information, see
www.MaytagCommercialLaundry.com
GENERAL USER INFORMATION
Scrolling ‘out of order’ showing in display, followed by a
failure or diagnostic code
This condition indicates the washer is inoperative.
‘0 Minutes’ showing in display
This condition indicates the washer cannot be operated. Coins
dropped or debit inputs during this 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 Start (after power failure)
A few seconds after power is restored, if a cycle was in progress
at the time of the power failure, ‘RESELECT CYCLE’ will flash
in the display, indicating the need for a button press to restart
the washer.
Door Lock
The door will be locked when the cycle starts. The door will remain
l
ocked until the end of a cycle or approximately 2 minutes after a
power interruption.
Pricing
After the door is opened following the completion of a cycle,
the display indicates the cycle price (unless set for free operation).
As coins are dropped or debit inputs arrive, the display will change
to lead the user through the initiation of a cycle.
Free Cycles
This is established by setting the cycle price to zero. When this
happens, ‘SELECT CYCLE’ will appear rather than a cycle price.
Display
After the washer has been installed and plugged in, the display will
show ‘0 MINUTES’. Once the washer has been plugged in and the
washer door opened and closed, the display will show the price. In
washers set for free cycles, the display will flash ‘SELECT CYCLE’.
NOTE: Not displayed on washer as shown. Message scrolls
followed by the failure or diagnostic code.

Maytag Commercial MHN30PN Specifications

General

Brand	Maytag Commercial
Model	MHN30PN
Category	Washer
Language	English

Summary

Basic Operation and User Information

WARNING: Electric Shock Hazard

Critical safety warning about disconnecting power before servicing.

Electrostatic Discharge (ESD) Precautions

Control Set-Up Procedures

Setting Up Control Codes

Guide to programming wash cycles using set-up codes and keypad functions.

Diagnostic Guide and Error Codes

Diagnostic Guide

General troubleshooting steps and checks before servicing.

Failure/Error Display Codes

Explains common error codes like CCU ERROR and MCU ERROR.

Service Access and Diagnostic Modes

Service Access Code

Procedure to enter service mode without removing the console.

Diagnostic Test Modes

Overview of diagnostic modes like Code Display, Flashing Mode, and Special Cycle Mode.

Help Mode

Verifying washer behavior and checking system status via Help Mode.

Diagnostic Test Procedures

Quick Overview Test

Step-by-step guide for the Quick Overview Test.

Manual Overview Test

Detailed test for system components before replacement.

Component Testing and Specifications

Pump Motor and Transformer Tests

Procedures for testing pump motor continuity and transformer resistance.

Water Temperature Sensor Test

Instructions for measuring water temperature sensor resistance.

Wiring Diagram

CCU and Component Connections

Diagram showing wiring between CCU, MCU, UI, and other components.

Troubleshooting Guide

Blank Display and Keypad Issues

Washer Vibration and Drum Rotation

Incorrect Water Temperature