W&H recommends recording all periodic tests, repairs and modifications on the sterilizer in a logbook including date and signature of the person who carried out the test or other activity. Compulsories of recording is regulated by local/national guidelines. more

All W&H sterilizers features test cycles (B&D/Helix test, Vacuum test). Compulsory and frequency of testing are regulated by local/national guidelines. more

Validation is a testing procedure carried out by an official authority, proving the effectiveness of your sterilizer. Compulsories and frequency of validation are regulated by local/national guidelines. more

POSSIBLE CAUSE
The main switch or network circuit breaker is OFF.
SOLUTION
Activate the main switch or network circuit breaker (ON).

POSSIBLE CAUSE
No voltage at the socket.
SOLUTION
Check the building electrical supply.

POSSIBLE CAUSE
The power cord is not connected properly.
SOLUTION
Check and connect the power cord properly. more

POSSIBLE CAUSE
Leaks through the chamber door seal.
SOLUTION
Clean or replace the door seal. Clean the door surface facing the chamber.

POSSIBLE CAUSE
Internal leak.
SOLUTION
Contact an authorized W&H service partner. more

To ensure that your instruments are stored in a sterile state from their successful sterilization until they are used, W&H recommends wrapping them in suitable sterile barrier systems before sterilization. The recommended storage period can be found in the recommendations of the wrapping material manufacturer. For further information, please contact your dealer. more

The water quality for sterilizers is internationally specified by standards and directives. The reasons for this are that your sterilizer can be seriously damaged by it or the sterilization can be jeopardized. Consequently, only water with conductivity of less than 15 µS/cm should be used for your W&H sterilizer. The Water treatment devices is especially suited to preparing suitable water (see chapter “Water quality” in the Instructions for Use). more

POSSIBLE CAUSE
Instruments rinsed with tap water and not dried before sterilization.
SOLUTION
Ensure that instruments are rinsed with distilled or demineralized water and completely dry before they are placed in the sterilizer.

POSSIBLE CAUSE
Use of water of poor quality or water containing chemical substances.
SOLUTION
Drain both water tanks. Use good quality water (see chapter “Water quality” in the Instructions for Use).

POSSIBLE CAUSE
Organic or chemical residues on the instruments
SOLUTION
Clean, rinse and dry instruments before placing them in the sterilizer (see chapter “Load maintenance and preparation” in the Instructions for Use.

POSSIBLE CAUSE
Dirt in chamber, trays, tray rack.
SOLUTION
Clean the chamber and wash the chamber furniture.

POSSIBLE CAUSE
Contact between instruments of different materials.
SOLUTION
Ensure that instruments of different materials do not touch each other (aluminium, carbon or stainless steel, etc.); place them on different trays or cassettes or pouch them (see chapter “Load maintenance and preparation” in the Instructions for Use).

POSSIBLE CAUSE
Scale deposits on the chamber.
SOLUTION
Clean the chamber and use good quality water (see chapter “Water quality” in the Instructions for Use). more

POSSIBLE CAUSE
An electronic board was replaced when serviced.
SOLUTION
The memory of the old board can not be restored. Consult the cycle history in the USB pen drive. more

POSSIBLE CAUSE
Door seal not properly placed.
SOLUTION
Ensure that the door seal is correctly inserted around the whole circumference.

POSSIBLE CAUSE
Door jammed by external objects or by the load itself.
SOLUTION
Remove any objects interfering with the chamber door. Check for interference between the door and the chamber furniture and/or the load. more

POSSIBLE CAUSE
The unit was turned off while in standby mode.
SOLUTION
Press the standby mode button to exit. more

POSSIBLE CAUSE
The chamber temperature dropped below the minimum threshold and the software performed a successful recovery.
SOLUTION
Wait for cycle completion. If the problem occurs frequently, contact an authorized W&H service partner. more

POSSIBLE CAUSE
The USB mass storage is disconnected or full.
SOLUTION
Check presence and condition of the USB pen drive. If the problem persist, contact an authorized W&H service partner. more

POSSIBLE CAUSE
The maintenance program needs to be carried out.
SOLUTION
Contact an authorized W&H service partner. more

POSSIBLE CAUSE
Printer not properly connected or not powered.
SOLUTION
Check the data and power connection to the printer. more

POSSIBLE CAUSE
Water filling system not connected.
SOLUTION
Connect the water filling system to the sterilizer. (see ANNEX 7 For water quality requirements see chapter “Water quality” in the Instructions For Use).

POSSIBLE CAUSE
When the water filling system attempted to fill the tank, water was temporarily unavailable.
SOLUTION
Since the water tank filling is attempted only once in-between cycle execution, this event inhibits water feeding. Switch the sterilizer OFF and then ON again.
Check the external water supply system.
Check for water leaks from the sterilizer.

POSSIBLE CAUSE
Faulty MIN water level sensor in the clean water tank.
SOLUTION
Contact an authorized W&H service partner. more

POSSIBLE CAUSE
Sterilizer not properly levelled.
SOLUTION
Place the sterilizator on a flat, level surface.

POSSIBLE CAUSE
Overloaded chamber.
SOLUTION
Comply with the maximum load weight limits for each type of load. Always use the chamber rack for trays and cassettes.

POSSIBLE CAUSE
Chamber filter clogged.
SOLUTION
Remove and clean the chamber filter.

POSSIBLE CAUSE
Chamber filter cap mispositioned.
SOLUTION
Mount the chamber filter cap properly (see chapter “Monthly or 50-cycle maintenance - Cleaning the chamber filter” in the Instructions for Use).

POSSIBLE CAUSE
Load incorrectly placed.
SOLUTION
Follow the recommendations as listed in chapter “Load maintenance and preparation” in the Instructions for Use. more

POSSIBLE CAUSE
A consumable needs to be replaced.
SOLUTION
Order the requested consumable (door seal, dust filter, bacteriological filter) and replace it. See the chapter “Maintenance” in the Instructions for Use. more

Validation generally comprises a range of tests defined in internationally recognised standards. These tests begin for every device with the factory tests at W&H. In addition, corresponding documentation is included with your device. Prior to commissioning the device at your premises, the technician performs further checks to ensure the device functions correctly. Then, depending on the national/regional laws and directives, the device must be subjected to a so-called renewed performance qualification at regular intervals. For further information, please contact your dealer. more

The max. noise level of Lisa 2019 is 64.3 dB. more