W&H Lexa Error Codes 520 – 591
Understanding the error codes that can occur while operating an autoclave is vital to ensure it functions optimally and reliably. This article explores the different error
codes associated with the W&H Lexa, detailing their meanings and steps to troubleshoot them.
This article focuses on error codes 520 – 591, sourced from the official troubleshooting manual provided by W&H.
If you have any queries regarding these error codes, the W&H Lexa, or any other related matters, feel free to contact us at 704-966-1650 Option 3 for our Free Tech Support Line.
Error Codes
Error Code 520
Description –Door locking timeout.
Possible Causes
A.) Microswitch disconnected (LOCKED position).
B.) Microswitch failure (LOCKED position). Main board failure.
Checks and Actions
A.) Check the connections between the microswitch (LOCKED position) and the main board and the relevant wires. If the problem persist, see next step.
B.) See Test instructions service book, chapter SPECIFIC TEST FOR INDIVIDUAL COMPONENTS, Door locking system – automatic mode, Door locking system – manual mode. Replace the microswitch if needed. If the problem persists, check the continuity of the cables from the microswitch to the main board. If the problem persists, replace the main board.
The W&H Lexa Main Board with Temp Sensors can be found here on our website.
Error Code 521
Description – No current through the door locking motor.
Possible Causes
A.) Motor disconnected.
B.) Main board failure (current detection or motor supply).
C.) Cable failure.
D.) Motor failure.
Checks and Actions
A.) Check the connections between the motor, the pressure switch and the main board.
B.) See Test instructions service book, chapter SPECIFIC TEST FOR INDIVIDUAL COMPONENTS, Door locking system – automatic mode, Door locking system – manual mode. If the motor rotates, but the problem persists replace the main board. Otherwise see next step.
C.) Check the integrity of the relevant wires. If needed replace cables.
D.) See Test instructions service book, chapter SPECIFIC TEST FOR INDIVIDUAL COMPONENTS, Door locking system – automatic mode, Door locking system – manual mode.
The W&H Lexa Main Board with Temp Sensors can be found here on our website.
Error Code 522
Description –Door locking motor: too high current at start (during door closure)
Possible Causes
Motor failure. Main board failure.
Checks and Actions
See Test instructions service book, chapter SPECIFIC TEST FOR INDIVIDUAL COMPONENTS, Door locking system – automatic mode, Door locking system – manual mode.
Error Code 526
Description – Unexpected position of the microswitch (the door is locked and the switch changes status)
Possible Causes
Microswitch failure. Main board failure
Execution of the Emergency door opening procedure.
Checks and Actions
Replace the door locking system, if the problem persists replace the main board.
The W&H Lexa Main Board with Temp Sensors can be found here on our website.
Error Code 527 – 531
Description – Impossible position detected.
Possible Causes
Microswitch failure. Main board failure.
Checks and Actions
See Test instructions service book, chapter SPECIFIC TEST FOR INDIVIDUAL COMPONENTS, Door locking system – automatic mode, Door locking system – manual mode.
Error Code 529
Description – Unexpected pressure during door opening.
Possible Causes
Pressure sensor failure. Main board failure.
Checks and Actions
Depressurize the chamber artificially (activate the chamber safety valve manually). If the problem persists, disconnect progressively all sensor cables from the main board. Every time you disconnect a sensor, check the ERRORS screen:
- If the error disappears, replace the cable/sensor that causes the error.
- If the error persists, replace the main board
The W&H Lexa Main Board with Temp Sensors can be found here on our website.
Error Code 532
Description – Door locking motor: too high current at start (during door opening)
Possible Causes
Motor failure. Main board failure.
Checks and Actions
See Test instructions service book, chapter SPECIFIC TEST FOR INDIVIDUAL COMPONENTS, Door locking system – automatic mode, Door locking system – manual mode.
Error Code 533
Description – Door unlocking timeout.
Possible Causes
- Wrong microswitch connection (OPEN side).
- Microswitch failure (OPEN side). Main board failure.
Checks and Actions
The following should only be performed on OPEN side microswitch:
See Test instructions service book, chapter SPECIFIC TEST FOR INDIVIDUAL COMPONENTS, Door locking system – automatic mode, Door locking system – manual mode.
Error Code 534
Description – Impossible position detected.
Possible Causes
Microswitch failure. Main board failure.
Checks and Actions
See Test instructions service book, chapter SPECIFIC TEST FOR INDIVIDUAL COMPONENTS, Door locking system – automatic mode, Door locking system – manual mode.
Error Code 535
Description – Door locking: motor: current consumption error (during door opening)
Possible Causes
Motor failure. Main board failure.
Checks and Actions
Replace the door locking system, if the problem persists replace the main board.
The W&H Lexa Main Board with Temp Sensors can be found here on our website.
Error Code 591
Description – Software error in door position detection
Possible Causes
Software error. Main board failure.
Checks and Actions
Upgrade the software to the latest version, if the problem persists replace the main board.
If the problem persists, call service.
The W&H Lexa Main Board with Temp Sensors can be found here on our website.
As always if you have any questions about this process or anything else please feel free to contact us and take advantage of our “FREE TECH SUPPORT.”
We also offer FREE VIRTUAL TECH SUPPORT to “See and Talk” with a “Real Time Live Technician” for any problems you may be in need of help with.
You can also use our “FREE MAINTENANCE PROGRAM”. Take the guesswork and worrying about what unit is due for maintenance and which maintenance cycle it is time for. We will keep track of all your autoclaves and let you know when it’s time for anything.
The W&H Lexa Sterilizer is available to purchase here.
We also have a range of parts for the W&H Lexa on our website that you can find here.
The W&H Lexa Installation Guide is available to view here on our website.
The W&H Lexa Operation Guide is available to view here on our website.
The W&H Lexa Printer Management Guide is available to view here on our website.
The W&H Lexa Maintenance Guide is available to view here on our website.