Front Loading Utensil Washer Disinfector (WDF)
Operation, Maintenance and Installation Manual
Issue 1
Page
20
20/01/2022
6.3
Recommended preventative maintenance schedule
(to be performed by qualified maintenance personnel)
To be performed
THREE TIMES YEARLY
for devices in constant day and night use and
HALF YEARLY
or
YEARLY
for devices
in lesser usage situations
WARNING 240/415 VOLTS!
ISOLATE DEVICE FROM ELECTRIC SUPPLY BEFORE SERVICING
HOT SURFACES!
ALLOW DEVICE TO COOL PRIOR TO COMMENCING SERVICE WORKS
1.
Remove rear top and side panels and front lower panel.
Note: Panel removal
i)
Remove 11 screws from the rear panel
ii)
Lift the top panel up and forwards to remove. Take care not to pull harnesses.
iii)
Remove the side panels by sliding towards the rear and then out to clear the bottom tabs.
iv)
Remove 2 x M5 screws from bottom corners of the front lower panel
2.
Remove and clean the sprays as per
6.4 Wash Arm Nozzle Cleaning Instructions
3.
Check condition of baskets for damage
4.
Check operation of centre wash arm check valve
5.
Check condition of centre wash arm spigot O-ring
6.
Check for scale build up inside wash tank sump. Remove and clean temperature probe.
7.
Check for scale build up on element
8.
Water inlet solenoids: Check filters for material build up, clean if necessary
9.
Make sure the water fill solenoids are completely shutting off and levels are not creeping up, if so, clean and/or
replace the solenoid
10.
Detergent pump: Check hose on pump and hoses in detergent lines for cracks or signs of leaks
11.
Cycle verification: Run a cycle and check temperatures attained and wash cycle times are within the operating
parameters
12.
Replace battery on processor PCB every 12 months. Check time and date are correct, adjust if required
Malmet will make available on request circuit diagrams, component parts lists, descriptions, calibration instructions,
or information which will assist the user’s appropriately qualified technical personnel to repair those parts of the
device.
6.4
Wash Arm Nozzle Cleaning Instructions
Ensure device is isolated prior to removing wash arms to ensure it cannot be inadvertently used while arms are removed
for service
Remove wash arms from mounting bosses by unscrewing the retaining knob, and sliding wash arm off the axle
Check that the nozzle holes are clear and clean as necessary
Hold under tap and pressurise through the nozzle outlet in opposite direction of normal flow. In areas with hard water or
high minerals in water supply, leaving wash arms to soak in a chemical de-scaler may be the quickest and easiest means to
remove build-up of deposits
