Other problems
MN-111 | Service book | Errors and Troubleshooting MN-111 ENG Rev08 | 2019/06/21 | © 2019 W&H Sterilization Srl
19
USB DEVICE PROBLEMS
Description
Possible Cause
Checks and actions
USB error
No communication between the MMI to the USB
devices/boards
Check the connections between the HUB, the MMI board and the USB
plug. If all connections are OK, replace the faulty component.
HTML save error or
SCL save error
Impossible to save a file on the USB device
Check if the USB device works properly.
Check if there is enough memory space in the USB device.
Note
: The SCL files take much more memory space that the HTML files.
Check if the USB device is formatted, format if necessary. Valid
formats are FAT 16 or FAT32.
Is suggest to format the USB device through the sterilizer.
DISPLAY PROBLEMS
Description
Possible Cause
Checks and actions
Points or lines are missing on the touch screen
Connection problems
Check display connection on MMI board.
Touch screen failure
Replace the MMI board if necessary.
Touch screen is too dark
Connection problems
Check the sterilizer power supply.
Check MMI board connection.
Check connection MMI removable module.
Touch screen failure contrast off
Adjust the display contrast. Please refer to the Instructions for use.
The sterilizer is in SLEEP MODE
Press the
icon or open or close the chamber door to exit sleep
mode.
Touch screen failure
Replace MMI board if necessary.
Touch screen is too bright or show strange colour
Connection problems
Check MMI board connection (e.g. Display flat cable).
Touch screen failure
Replace MMI board if necessary.
Display is working but the touch is not working
Connection problems
Check MMI board connection (e.g. touchscreen connector).
Touch screen failure
Replace MMI board if necessary.
User configuration lost or cycle history lost
SD card not detected
Check if the SD card in insert properly in the MMI slot.
Replace SD card if necessary (the SD card shall be programmed).
Replace MMI board if necessary.
OTHER PROBLEMS AND MALFUNCTIONS
Description
Possible Cause
Checks and actions
Wet load at the end of the cycle
Chamber overloaded
See maximum load weight specified for each cycle and type of load.
Please refer to the Instructions for use.
Wrong load distribution
Check if rack and trays are well positioned. See Instructions for use.
Particular load type
Extend the drying time.
Bacteriological filter failure
Replace the bacteriological filter. Please refer to the Instructions for
use.
Chamber filters obstructed
Clean the chamber filters. Please refer to the Instructions for use.
White stains on the load, chamber, trays and/or
chamber rack
Water quality
Check the quality of the water used for sterilization and switch to water
of better quality if necessary. If water gets close to the threshold of
15µs/cm conductivity, it may cause spots on sensitive objects such
as mirrors.
Load not properly rinsed and/or dried
Ensure that loads get properly rinsed and dried prior to placement in
the sterilizer to prevent stains from minerals of residual tap water.
B&D or HELIX test not passed
Leakage
See error "100" on page 11 and "130" on page 12, all causes.
Non conform water
Drain and clean the sterilizer water tank. Please refer to the
Instructions for use.
Check external filling system.
Safety valve leakage or sudden opening
Load not properly rinsed
Clean instruments and sterilizer chamber. Please refer to the
Instructions for use.
Non conform water
Drain and clean the sterilizer water tank. Please refer to the
Instructions for use.
Check external filling system.
Chamber not properly rinsed after cleaning
Clean sterilizer chamber. Please refer to the Instructions for use.
