Front Loading Utensil Washer Disinfector (WDF)
Operation, Maintenance and Installation Manual
Issue 1
Page
21
20/01/2022
6.5
Stainless Steel Maintenance/Care
Under normal usage, stainless steel products require regular cleaning with a soft clean rag moistened with a mild
detergent followed by a water-moistened clean rag and then a dry rag.
The #4 satin finish steel should be protected against muriatic acid and caustic or abrasive materials and harsh cleaning
detergents. In the event such agents cause discoloration, polish with a stainless steel cleaner such as 3M Stainless Steel
Cleaner & Polish and a pad.
7.0
Safety Checks
After servicing or repairing, the device shall be checked to confirm correct cycle operation and that the device is in a safe
operating state before being returned to service.
7.1
Door Safety Test
To check the correct functionality of the door safety and position sensors, open and close the door whilst watching the
Status LED and LCD display on the device. Rest the door closed so it is not in the catched position, check the status LED
displays orange and that “Door Open” is displayed on the LCD. Next push the door so it catches closed, and again check
the Status LED is displays green and the LCD now shows “Ready”.
7.2
Cycle Operation Check
After completion of the required checks above, a cycle operation check is to be completed. Run the device through a
complete cycle ensuring correct sequence of operation as per section 4 of this manual. Inspect for fluid leaks from around
the chamber door, rear service connections and beneath the device. If no faults are found during the inspection, and the
device displays no faults at end of the cycle, the device is fit for return to operation.
7.3
Post Maintenance And Repair Of Electrical Systems
Additional to the above safety tests if any repair or service work has been carried out that could affect the electrical safety
of the device; it must be inspected and tested as per the requirements of AS/NZS 3760 prior to being returned to service.
Inspection
1.
Check for obvious damage, defects or modification to the device that may affect its safe operation.
2.
Check the main power cord is effectively anchored to device, that the outer sheath is not damaged and free of
discoloration that may indicate exposure to excessive heat, chemicals or moisture, and that none of the internal cores
are visible.
3.
Check all guards are installed and secure, all ventilation inlets/outlets are unobstructed and that operating controls are
in good working order.
Testing - An insulation meter or PAT with an accuracy of class 5 or better shall be used for the following tests.
1.
An earth continuity test between the protective earth conductor and accessible earthed parts. Must not exceed 1Ω.
2.
Insulation resistance test between the live supply conductors connected together and accessible earthed parts. During
test equipment ON/OFF switch must be in the ‘ON’ position. Must not exceed 1Ω.
If device fails any of the above tests it is not safe for operation, and cannot be put into service until the cause
of the fault has been rectified and successful completion of tests.
