Malmet WDF-3020 User manual

Serial Number:
Supplied to:
Date Installed:
Installed by:
Issue 1
Head Office and Customer Service
ABN 95 001 717 791
9-11 McKay Avenue
PO Box 373
Leeton NSW 2705
Phone: [phone]
Email: [email protected]
Front Loading Utensil
Washer Disinfector
Model WDF-3020
Operation, Maintenance and
Installation Manual
Note: Due to Malmet’s Policy of continuous product improvement;
design and technical specifications are subject to change without notice.

Front Loading Utensil Washer Disinfector (WDF)
Operation, Maintenance and Installation Manual
Issue 1 Page 1 20/01/2022
Table of Contents
Foreword .............................................................................................................................................................................................................2
Certifications and Compliances............................................................................................................................................................................ 2
Quality Policy .......................................................................................................................................................................................................2
Important Warranty Reminder ............................................................................................................................................................................2
Malmet Head Office and Factory Contact Details................................................................................................................................................2
Safety Instructions –Warnings ............................................................................................................................................................................3
Intended Use........................................................................................................................................................................................................4
1.0 Design Parameters ..................................................................................................................................................................................4
1.1 Operating Cycles ..................................................................................................................................................................................5
1.2 Chemical Dosing System ...................................................................................................................................................................... 5
1.3 Device Features....................................................................................................................................................................................6
1.4 Control Panel........................................................................................................................................................................................6
1.5 Buttons & Indicators ............................................................................................................................................................................7
1.6 LCD Layout............................................................................................................................................................................................7
2.0 Loading and Operation............................................................................................................................................................................8
2.1 Lower basket configuration..................................................................................................................................................................8
2.2 Upper basket configuration.................................................................................................................................................................. 9
3.0 Detergent replacement procedure .......................................................................................................................................................10
4.0 Cycle of Operation.................................................................................................................................................................................11
5.0 Device faults ..........................................................................................................................................................................................13
5.1 Fault indication...................................................................................................................................................................................13
5.2 Operator resettable faults..................................................................................................................................................................13
5.3 Fault list..............................................................................................................................................................................................14
5.7 Making equipment safe after incomplete operating cycle................................................................................................................. 18
5.4 Error reset ..........................................................................................................................................................................................18
5.5 Master reset (access to load in a fault condition) ..............................................................................................................................18
6.0 Maintenance .........................................................................................................................................................................................19
6.1 Daily maintenance (operator or maintenance technician) ................................................................................................................19
6.2 Bi-monthly maintenance (maintenance technician) ..........................................................................................................................19
6.3 Recommended preventative maintenance schedule (to be performed by qualified maintenance personnel)................................. 20
6.4 Wash arm nozzle cleaning instructions ..............................................................................................................................................20
6.5 Stainless steel maintenance/care.......................................................................................................................................................21
7.0 Safety checks .........................................................................................................................................................................................21
7.1 Door safety test.................................................................................................................................................................................. 21
7.2 Cycle operation check ........................................................................................................................................................................21
7.3 Post maintenance and repair of electrical systems............................................................................................................................21
8.0 Replacement of safety devices..............................................................................................................................................................22
9.0 Installation and Commissioning ............................................................................................................................................................ 24
9.1 Installation..........................................................................................................................................................................................24
9.2 Risk Assessment .................................................................................................................................................................................24
9.3 Handling .............................................................................................................................................................................................24
9.4 Service Connections ........................................................................................................................................................................... 25
9.5 Plumbing ............................................................................................................................................................................................25
9.5 Electrical............................................................................................................................................................................................. 25
9.6 Service connection and layout details................................................................................................................................................ 26
9.7 Dimensions......................................................................................................................................................................................... 27
9.8 Recommended installation clearances...............................................................................................................................................27
10.0 Commissioning (To only be completed by qualified persons) ...............................................................................................................28
11.0 Technical Data .......................................................................................................................................................................................28
11.1 Power and Water Consumption.........................................................................................................................................................28
11.2 Device specifications ..........................................................................................................................................................................29
11.3 Wiring Diagram (WDF-3020) .............................................................................................................................................................. 30
Warranty Statement ..........................................................................................................................................................................................31

Front Loading Utensil Washer Disinfector (WDF)
Operation, Maintenance and Installation Manual
Issue 1 Page 2 20/01/2022
Foreword
In order to obtain maximum life and efficiency from your Malmet Front Loading Utensil Washer Disinfector and to aid in the safe
operation of the device, please read and understand this manual thoroughly and follow all instructions before operating.
This device is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of
experience and knowledge.
Children should be supervised to ensure that they do not play with the device.
The specifications supplied in this manual were in effect at time of publication, however due to Malmet (Australia)’s policy of
continuous improvement, changes to these specifications may be made at any time without notice on the part of Malmet
(Australia) Pty Ltd.
Certifications and Compliances
ARTG Identifier: 381412
Electrical Safety Cert: CS10975N
Watermark Cert: WMK26630
Quality Policy
Malmet’s quality management system is certified to ISO 13485:2016 and ISO 9001:2015 and guarantees the quality of this device.
Important Warranty Reminder
Should you have any problems with your device, contact the company from whom you purchased it, or Malmet (Australia) Pty Ltd.
It is important that the name from whom you purchased your device and the name of the installer are recorded on the front page
of this manual. The installer is responsible for the correct installation, start up and demonstrating the operation of this device.
They are also responsible for issuing relevant certificates of compliance (these may differ from state to state).
Malmet Head Office and Factory Contact Details
Malmet (Australia) Pty Ltd
9-11 McKay Avenue
PO Box 373
LEETON NSW 2705
Telephone: [phone]
E-mail: [email protected]om.au
Website: www.malmet.com.au

Front Loading Utensil Washer Disinfector (WDF)
Operation, Maintenance and Installation Manual
Issue 1 Page 3 20/01/2022
Safety Instructions –Warnings
Please read and understand this manual before using this device, if this device is used in a manner not specified by the
manufacturer protection by the device may be impaired.
Please refer to this manual for information wherever this warning symbol is displayed –
Be aware of 240V / 415V Voltage
Disconnect power when servicing
Mains power ISO switch must be in an accessible position easily reached and not
obstructed so device can be isolated from mains power during service
For the safe use of this device the responsible body should ensure that all operators
are adequately trained to operate and maintain the device in its safe use
Only process items listed as per the design parameters in this manual
Be aware of steam discharge
Utensils and racks are hot to handle
Safety gloves and goggles must be worn when changing detergent
Be aware of hot surfaces, pipes and hoses from steam and hot water
Machine to be serviced and repaired by trained personnel
Safety critical devices must only be replaced by trained personnel
Plumbing service connection must comply with AS/NZS 3500.1 & AS/NZS 3500.2
Not suitable for use in the presence of flammable anaesthetic mixtures with air or
nitrous oxide and mode of operation as continuous

Front Loading Utensil Washer Disinfector (WDF)
Operation, Maintenance and Installation Manual
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Intended Use
The Malmet Front Loading Utensil Washer Disinfector is designed to clean and disinfect during an automatic cycle
medical devices of the types intended to be re-used as listed in the design parameters section of this manual.
1.0 Design Parameters
The Malmet Front Loading Utensil Washer Disinfector has been designed within the following parameters:
a) To clean and disinfect during each automatic cycle a load comprised of the following re-useable medical devices.
i) 345mm/305mm/240mm/210mm/185mm/140mm/110mm/100mm/80mm bowls, dishes and receivers.
ii) 300mm/255mm/220mm/160mm Kidney dishes
iii) Large (270mmx100mm) & Small (200mmx75mm) Procedure/Instrument trays
iv) Utensils
b) Baskets & racks are designed to ensure that items being processed are not dislodged during the cleaning cycle; re-
useable medical devices must be loaded in the appropriate holder as per the loading specifications in this manual
to ensure correct processing.
c) The wash chamber and door are self-cleaning and do not permit water or soil to remain after a properly
completed cycle. Steam disinfection ensures all internal surfaces are totally clean and safe.
d) The wash cycle is comprised of the following stages:
i) Cold Rinse
ii) Hot Wash
iii) Hot Rinse
iv) Disinfection
v) Cool Rinse
e) The wash times and parameters are pre-set by factory but can be customized on request.
f) Disinfection cycle is factory pre-set to 90° for 1 minute, but is able to be set to any of the common holding times
used to achieve an A₀of 600 in accordance with AS/NZS 4187:2014, Section 6.3, Table 6.1. Disinfection can also be
set to achieve a target A₀between 600 and 5000 at a specified maximum temperature.
*The efficacy of disinfection can be impaired if soil removal is incomplete before the start of the disinfection process.
Users should be aware that some medical devices might require pre-treatment such as soaking or brushing before
processing. Please follow the manufacturer’s instructions when processing re-useable medical devices.
**High disinfection temperatures may affect some heat sensitive reusable medical devices; ensure items are
disinfected as per the manufacturer’s instructions.

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Operation, Maintenance and Installation Manual
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1.1 Operating Cycles
The Device has three Wash Cycle Options –Eco/Normal/Intense
Eco –Light Wash Cycle
1. Cold Rinse/Hot Wash 2 Min
2. Hot Rinse/Disinfection (Disinfection Parameters Set)
3. Cool down 20 Sec
Normal –Standard Wash Cycle
1. Cold Rinse 2 Min
2. Hot Wash 2 Min
3. Hot Rinse/Disinfection (Disinfection Parameters Set)
4. Cool down 20 Sec
Intense –Heavy Wash
1. Cold Rinse 2 Min
2. Hot Wash 2 Min
3. Hot Rinse 2 Min
4. Disinfection (Disinfection Parameters Set)
5. Cool down 20 Sec
Note: These times are only the Stage specific holding times and do not include filling, heating or draining.
Wash Stages
Wash cycles are comprised of the following stages:
Cold Rinse: Initial Rinse using water below 45°C
Hot Wash: Hot Wash at 50°C with the addition of detergent
Hot Rinse: Hot Water Rinse
Disinfection: Disinfection Wash as per set disinfection parameters (Factory 1 minute @ 90°C)
Cool Rinse: Final Rinse to cool processed items below 75°C
1.2 Chemical Dosing System
The chemical dosing system ensures the correct amount of process chemicals are delivered at the correct stage during
each operating cycle. Chemical addition is controlled by the automatic cycle controller and an alarm if the incorrect
amount of chemical is injected. The dosing system is designed for use with Malmet Chemical; other chemicals may impair
the operation of the system.

Front Loading Utensil Washer Disinfector (WDF)
Operation, Maintenance and Installation Manual
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1.3 Device Features
1.4 Control Panel
LCD Control
Panel/HMI
Service Access
Panel
Wash Chamber
Access Door
Adjustable
Machine Feet
Status LED
Power
Button
Display
Back
Button
Start
Button
Rotary Dial &
Select Button
Cycle
Indication
LED Halo

Front Loading Utensil Washer Disinfector (WDF)
Operation, Maintenance and Installation Manual
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1.5 Buttons & Indicators
Status LED RED = OFF
ORANGE = Power On & Door Open
GREEN = Power On & Door Closed
POWER On/Off (Standby)
Cancel Cancel selection or Exit to previous Menu
Select/Rotary Dial Pushing Down in the Rotary Dial selects the highlighted item, rotating
the dial navigates or changes selected fields
Start button Commence selected cycle
Cycle Indication LED Halo Flashes during cycle, displays solid at cycle completion
1.6 LCD Layout
Internal chamber
temperature
A₀value attained
during cycle
Wash cycle
selected
Disinfection
temperature
selected
Status

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Operation, Maintenance and Installation Manual
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2.0 Loading and Operation
For the safe use of this device the responsible body should ensure that all operators are adequately
trained to operate and maintain the device in its safe use.
The Malmet Front Loading Utensil Washer Disinfector has two baskets for processing of re-useable medical devices of the
type listed as per the design parameters. The lower basket is intended to process bowls of various sizes, while the top
basket is intended to process a combination of kidney dishes and other small utensils.
Open door and pull out basket to be loaded.
2.1 Lower basket configuration
LOWER BASKET
UPPER BASKET
LOWER BASKET
Bowls, dishes, or receivers of 185mm - 345mm in diameter with a depth not greater than 120mm can be
loaded in the lower basket as per the above configuration

Front Loading Utensil Washer Disinfector (WDF)
Operation, Maintenance and Installation Manual
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2.2 Upper basket configuration
UPPER BASKET
The upper basket is split into two sections, a rack in the rear half for kidney dishes from 160-300mm. And a front
section which can accommodate smaller bowls, gallipots and receivers. An optional utensil basket can also be used for
smaller items.
NOTE: Take care when loading the top basket to ensure nothing protrudes below the basket that could potentially
foul the wash arm and prevent it from turning.
Large Kidney Dish Rack
Utensil Basket

Front Loading Utensil Washer Disinfector (WDF)
Operation, Maintenance and Installation Manual
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3.0 Detergent replacement procedure
WARNING!
SAFETY GLOVES AND GOGGLES MUST BE WORN WHEN CHANGING
DETERGENT AND DISPOSING OF EMPTY CONTAINERS
Current Safety Data Sheet for Malmet device Detergent is available in .PDF format from Malmet’s website.
www.malmet.com.au
Only use Malmet approved detergent (See technical data for detergent details)
1. Ensure area is clear of any potential hazards
2. Ensure you are wearing appropriate PPE
3. Move new bottle as close as practical to unit’s detergent storage location
Note: Leave cap on new bottle until in position
4. Remove empty detergent container and sit beside new detergent container
5. Remove lid from new container, then carefully remove suction cap and hose from old container an insert into the
new container and fasten cap
6. Place lid of old container onto empty container
7. Put new container back into position
8. Restart device operation as normal
Disposal of empty detergent bottles
1. When handling empty containers treat as though container is full and wear appropriate PPE as per SDS requirements
2. Triple rinse container and puncture base to render unusable
3. Dispose of containers as per facility chemical waste handling procedures, and/or local government requirements

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Operation, Maintenance and Installation Manual
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4.0 Cycle of Operation
The operation can be stopped at any time by pressing the Power button to the left of the display
In an emergency power off and isolate device at isolator/circuit breaker
1. Press the POWER button; to wake the device from Stand-by mode:
Stand-by
After a short delay display will show READY
Ready
2. Open door; and load items to be processed; display will show:
Door Open
3. When door is closed; display will show:
Ready
4. To start cycle press the start button; the door will lock, the cycle indication LED Halo around the start
button will begin to flash green and the display will show each cycle stage as the automatic cycle is
completed:
Cold Rinse

Front Loading Utensil Washer Disinfector (WDF)
Operation, Maintenance and Installation Manual
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Cycle of Operation cont’d
5. Hot Wash; display will show:
Hot Wash
6. Disinfection; display will show:
Disinfection
7. Cool rinse; display will show:
Cool Rinse
8. Cycle Completion; on successful cycle completion the door will unlock, the cycle indication LED Halo
around the start button will display solid green; display will show:
Cycle Finished
Note: The cycle summary information will remain on the screen until the door is opened for manual recording
purposes. This information can be accessed through the operator level menu for the previous 5 cycles if
required.

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Operation, Maintenance and Installation Manual
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5.0 Device faults
In the event of a fault or malfunction with the device during operation, abort the cycle by pressing the Power button on
the control LCD. Once the device is off, isolate the mains power supply and water services. Notify maintenance or service
provider of the fault and ensure device is not used until the fault is rectified.
5.1 Fault indication
In the event of a failure detected during or outside of cycle the device will go into fault. The display will show the fault
code corresponding to the cause of the fault, a brief description, the time at which the fault occurred, and any actions
required to resolve the fault.
If a fault occurs during a cycle access to the load will not be allowed until the cause of the fault has been fixed and a cycle
has been successfully completed. Please refer to the Fault Codes section of this manual for a description of the fault code
displayed.
Fault Screen Example
5.2 Operator resettable faults
Detergent dosing fault
At the start of cycle the chemical dosing system performs a self-check to ensure detergent is present prior to commencing
the cycle and checks the correct volume is delivered during the cycle. If detergent is not detected or the correct volume is
unable to be achieved the display will show:
Fault 03 –Detergent Empty
The device will then perform a drain step, once completed the display will cycle between:
Refill Detergent Press Start
Once the detergent has been replaced, (as per the detergent replacement procedure in this manual) Press the START
button. The unit will then prime the chemical dosing system; if successful the device will automatically start the cycle. If
priming is unsuccessful the device will remain in the fault condition. After 5 attempts if the device is unable to successfully
prime it will lock out any further priming attempts and require service intervention to rectify. The display will show:
Call Service
c
Machine Fault
F03 Deterg. Empty
3:06PM 21/6/21
Please Wait…
c
Machine Fault
F03 Deterg. Empty
3:06PM 21/6/21
Refill Detergent
c
Machine Fault
F03 Deterg. Empty
3:06PM 21/6/21
c
Machine Fault
F03 Deterg. Empty
3:06PM 21/6/21
Press Start
c
Machine Fault
F03 Deterg. Empty
3:06PM 21/6/21
c
Machine Fault
F03 Deterg. Empty
3:06PM 21/6/21
Call Service
c
Machine Fault
F03 Deterg. Empty
3:06PM 21/6/21
c
Machine Fault
Fault Code & Description
Time & Date Fault Occurred
Action Required

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Operation, Maintenance and Installation Manual
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Operator resettable faults cont’d
Door lock Error
On pressing the start button to commence a cycle, the machine will lock the door. If the door lock is not successfully
engaged a fault will be triggered. The display will show:
Fault 01 –Door Lock Error
The device will perform a drain step, once completed the display will cycle between:
Bump Door Closed Press Start
Check that the door is fully closed, once done press Start again. The device will attempt to engage the lock and start the
cycle. If successful, cycle will commence; if unsuccessful device will remain in the fault condition. After 5 attempts, if the
device is unable to successfully prime it will lock out any further priming attempts and require service intervention to
rectify.
5.3 Fault list
The operation of the Malmet Front Loading Utensil Washer Disinfector is controlled by a micro-processor. The processor
has fault detection capability and indicates faults by code on the LCD display
Fault 01
Door Lock Error
(No lock signal detected when door lock engaged)
Cause
Door not shut completely
Lock out of alignment
Lock position switch faulty
Lock solenoid failed
Fault 03
Detergent Empty
(No detergent detected during dosing)
Cause
Detergent container empty or suction hose not immersed in chemical
Detergent suction foot valve blocked or jammed
Flow meter blocked or impellor jammed
Non-approved detergent used
Detergent pump squeeze tube broken
Detergent pump failed
Flow meter failed
Fault 04
Rinse Aid Empty (Where Fitted)
(No Rinse Aid detected during dosing)
Cause
Rinse Aid container empty or suction hose not immersed in chemical
Rinse Aid suction foot valve blocked or jammed
Flow meter blocked or impellor jammed
Non-approved detergent used
Rinse Aid pump squeeze tube broken
Rinse Aid pump failed
Flow meter failed
Fault 06
Hot Fill
(Incoming water temperature for Cold Wash above 45°C)
Cause
Incoming water supply is too hot/incorrectly connected to hot water
c
Machine Fault
F01 Door Lock Error
3:06PM 21/6/21
Please Wait…
c
Machine Fault
F03 Deterg. Empty
3:06PM 21/6/21
c
Machine Fault
F01 Door Lock Error
3:06PM 21/6/21
Bump Door Closed
c
Machine Fault
F01 Door Lock Error
3:06PM 21/6/21
Press Start

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Fault 07
E-Stop
(Power button pressed during cycle)
Cause
Operator stopped cycle by pressing power button terminating operation
Fault 08
Power Interrupted
(Power loss during cycle)
Cause
Blackout or brown out
Faulty isolator
Blown control fuse
Fault 09
Syphon Fault
(Unit syphoning re-attempts attempts exceeded)
Cause
Drain Hose incorrectly installed
Negative pressure on drain hose connection
Fault 11
Detergent System Fault
(Detergent System dosing attempts exceeded)
Cause
Split or blocked suction tube
Split squeeze tube
Failed Rinse Aid Sensor
Fault 12
Detergent Over Dose
(Detergent volume delivered above allowed tolerance)
Cause
Detergent pump run on
Non approved detergent used
Controller error
Fault 13
Rinse Aid System Fault
(Rinse Aid System dosing attempts exceeded)
Cause
Split tor blocked suction tube
Split squeeze tube
Failed Rinse Aid Sensor
Fault 14
Rinse Aid Over Dose
(Rinse Aid volume delivered above allowed tolerance)
Cause
Blocked pump suction
Pump contactor failed
Wash pump failed
Fault 15
Filling Fault
(No water level increase detected during filling stage)
Cause
Water supply not turned on
Blocked inlet filter on water inlet solenoid
Water inlet solenoid failure
Blocked pressure sensing tube
Fault 16
Fill Timeout
(Water fill time exceeded)
Cause
Low incoming water pressure
Level sensor fault
Water syphoning from unit
Fault 17
Flood Protection
(Maximum water level exceeded)
Cause
Pressure sensor fault
Water inlet solenoid failure
Fault 18
Draining Fault
(No reduction in water level while drain pump operating)
Cause
Blocked drain pump inlet/outlet
Air lock in drain pump
Drain pump failed
Drain pump contactor failed
Fault 19
Water Level Low
(Water level dropped below minimum operation level during cycle)
Cause
Water syphoning from unit
Pressure Sensor Fault
Incorrectly loaded, container holding water

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Fault 20
Contactor Fail
(No feedback from contactor when ON)
Cause
Failed contactor
Wiring fault
Fault 21
Heating Fail
(No temperature rise seen during heating stage)
Cause
Over temperature protection device tripped
Blown element
Fault 22
Hot Wash Over Temp
(Control temperature set point tolerance exceeded)
Cause
Element relay fault
Temperature probe fault
Fault 23
Hot Rinse Over Temp
(Control temperature set point tolerance exceeded)
Cause
Element relay fault
Temperature probe fault
Fault 24
Disinfection Over Temp
(Control temperature set point tolerance exceeded)
Cause
Element relay fault
Temperature probe fault
Fault 25
Door Open
(Door detected open during cycle)
Cause
Door lock fault
Door position sensor fault
Door position sensor out of adjustment
Fault 26
Door Lock Fault
(Door unlock detected during cycle)
Cause
Faulty Door Lock Position Sensor
Door lock fault
Fault 27
Machine Contactor Fault
(Contactor state does not change when switched)
Cause
Failed Contactor
Controller Output Failure
Fault 28
Wash Pump High
(High current draw detected)
Cause
Pump impeller jammed
Start capacitor failure
Wash pump mechanical failure
Fault 29
Wash Pump Low
(Low or No current draw detected)
Cause
Start capacitor failure
Motor Failure
Wash pump mechanical failure
Fault 30
Unknown Load
(Load Detected outside or cycle)
Cause
Pump impeller jammed
Start capacitor failure
Wash pump mechanical failure
Fault 31
Cycle Time Exceeded
(Maximum allowable cycle time exceeded)
Cause
Low water pressure
Element leg failure
Fault 32
Disinfection Temp Fault
(Disinfection Temp not held)
Cause
Element Fault
Temp Sensor Fault
Phase dropped
Fault 33
Disinfection Time Fault
(Disinfection holding time not achieved)
Cause
Controller Failure

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Fault 34
Level Sensor Fault
(Level sensor fault detected)
Cause
Split tube to pressure sensor
Water build up in pressure sensor tube
Pressure sensor failed
Fault 35
Control Temp Probe Fail
(Probe fault detected)
Cause
Broken or shorted out connection
Probe failed internally
Fault 36
Validation Temp Probe Fail
(Probe fault detected)
Cause
Broken or shorted out connection
Probe failed internally
Fault 37
Temp. Probe Differential
(Control & validation temperature probe measurement discrepancy)
Cause
Probe not installed correctly
Probe fowled or covered by foreign object
Intermittent probe fault
Probe Failure
Fault 40
Master Reset
(A master reset of the device has been performed)
Cause
Service intervention

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5.7 Making equipment safe after incomplete operating cycle
If an incomplete cycle has occurred, it is assumed that the load being processed has not been subjected to a complete
cycle as per the set process parameters. For this reason access to the load is restricted and will not be allowed until a full
cycle has been completed.
At the end of an incomplete cycle or on powering up the device after an incomplete cycle, a fault code will display relating
to the cause of the incomplete cycle (Please see section 5.3 Fault list for description of fault code). Depending on the
nature of the fault an error reset may need to be completed; this can be done by following the instructions below. If the
device does not allow an Error Reset to be completed, or the fault re-occurs after an Error Reset, it is recommended that
the device is isolated and service is arranged to correct the fault.
The following functions must only be undertaken by trained service personnel.
5.4 Error reset
1. With the device in fault, press the both the Menu & Start Buttons simultaneously. A user login screen will appear.
2. Select User Level, Maintenance or Higher and enter 4 digit PIN.
3. Navigate to “Watch Pages” & press “Select”
4. Once in the “Watch Pages” menu, scroll down to “Machine Overview”
5. Once in the “Machine Overview” menu, scroll down to “Err Reset”
6. Select the highlighted field, and then change from “OFF” to “ON” using the rotary dial. Press dial in to “Select”
7. Once done press the “Cancel” button to exit each menu level until back at the Home screen.
If fault has been corrected, device will display “Ready” or automatically recommence the cycle depending on the
nature of the fault. If the fault recurs please Lock Out all services to the device and arrange for service to rectify.
5.5 Master reset (access to load in a fault condition)
1. With the device in fault, press the both the Menu & Start Buttons simultaneously. A user login screen will appear.
2. Select User Level, Maintenance or Higher and enter 4 digit PIN.
3. Navigate to “Watch Pages” & press “Select”
4. Once in the “Watch Pages” menu, scroll down to “Machine Overview”
5. Once in the “Machine Overview” menu, scroll down to “Master Reset”
6. Select the highlighted field, and then change from “OFF” to “ON” using the rotary dial. Press dial in to “Select”
7. Once done, while still in the “Machine Overview” menu. Scroll to “Err Reset” and select the highlighted field, then
change from “OFF” to “ON” using the rotary dial. Press dial in to “Select”
8. Once completed, press the “Cancel” button to exit each menu level until back at the Home screen.
9. Device should now be idle with the door unlocked.
Caution: When performing a Master reset to access the load, items are to be treated as unprocessed as they have
not been subjected to a complete cycle.

Front Loading Utensil Washer Disinfector (WDF)
Operation, Maintenance and Installation Manual
Issue 1 Page 19 20/01/2022
6.0 Maintenance
All maintenance; preventative or breakdown shall be carried out by a qualified person. Failure to comply
with this condition may result in unsafe conditions.
Preventative maintenance must be completed as per instructions below. Failure to comply may result in warranty
claims being rejected.
The Malmet Front Loading Utensil Washer Disinfector is self-cleaning; however, proper care should be taken to ensure
that the device is cleaned and maintained in accordance with maintenance instructions, regulatory requirements and
common sense practices.
Preventative maintenance schedule
6.1 Daily maintenance (operator or maintenance technician)
a) Run the device through a cycle to bring to operating temperature and disinfect the internal wash chamber area (do not
load any items).
b) Wipe out the inside of the door and chamber with warm water and detergent. A wipe with disinfectant is also
desirable.
c) Wipe over external stainless steel panels with a stainless steel cleaner (do not get cleaner on the control panel).
d) Wipe the front control panel with a soft cloth and mild detergent as necessary. Care should be taken not to damage
the digital display or to activate a cycle (turn off power at control panel).
e) Check tank mesh filter, remove and clean if soiled.
f) Check level in detergent bottle, replenish as necessary.
g) Visually inspect for signs of leaking fluid from the device, as these may pose a pathogenic risk. Inspect around the
chamber door, beneath the device and service connection points. If a spill or leak is observed, clean up as per the
facility’s infection control procedure and notify a maintenance technician to fix the cause of the leak.
6.2 Bi-monthly maintenance (maintenance technician)
WARNING 240/415 VOLTS!
ISOLATE DEVICE FROM ELECTRICAL SUPPLY BEFORE SERVICING
HOT SURFACES!
ALLOW DEVICE TO COOL PRIOR TO COMMENCING SERVICE WORKS
a) Inspect for steam or fluid leaks, tighten hose clamps and glands where necessary.
b) Check wash arms for free rotation.
c) Check spray nozzles in wash arms are not blocked, insert a small pin into the orifice of the spray nozzle to ensure no
blockages are present. If a build-up or blockage is detected, a technician should clean nozzles as per cleaning
instructions below to ensure adequate performance.
d) Remove temperature probe and clean off any residue or build up.
e) Visually inspect build-up of residue in tank, especially in locations with poor water quality.
f) Check filter in the water inlet solenoid valve and clean as necessary.
g) Check all electrical connections, and tighten if necessary.