W&H Lexa Error Codes 422 – 430
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 422 – 430, 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 422
Description –H20 overconsumption during HEA3 phase.
Possible Causes
A.) Door gasket failure.
B.) Water pump failure.
C.) Check/priming ULKA valve failure.
D.) Failure of the clean water MIN level sensor.
E.) S.G. temperature sensor failure
F.) Steam generator failure.
G.) Solenoid valve EV5 failure.
H.) Solenoid valve EV1 failure.
I.) EV5/EV1 tube line clogged/dirty
J.) Pressure transducer failure.
K.) Multiple failure: solenoid valve EV3 and check valve V1.
L.) Leakage (e.g. chamber)
Checks and Actions
A.) Check and replace the door gasket if needed.
B.) See Test instructions service book, chapter SPECIFIC TESTS FOR INDIVIDUAL COMPONENTS, Water pump. Replace the water pump if needed.
C.) See Test instructions service book, chapter SPECIFIC TESTS FOR INDIVIDUAL COMPONENTS, Water pump. Replace the ULKA valve if needed.
D.) See Test instructions service book, chapter SPECIFIC TESTS FOR INDIVIDUAL COMPONENTS, Water level sensors. Replace the sensor if needed.
E.) See Test instructions service book, chapter SPECIFIC TESTS FOR INDIVIDUAL COMPONENTS, Steam generator temperature sensor. Replace the sensor if needed.
F.) Run the diagnostic cycle S. G. Perform. Test. If necessary, replace the steam generator.
G.) Check the components conditions. Replace the components if necessary.
H.) Check the components conditions. Replace the components if necessary.
I.) Check the tube line conditions. Replace the components if necessary.
J.) See Test instructions service book, chapter SPECIFIC TESTS FOR INDIVIDUAL COMPONENTS. Replace the sensor if needed.
K.) Check the components conditions. Replace the components if necessary.
L.) Run a 270°F sterilization cycle with maximum load and check for leaks during the pressure and process phases. The check should be done visually (water drops, steam sprays). Fix any detected leak.
The W&H Lexa HEPA Filter is available on our website here.
The W&H Lexa Solenoid Valve EV1 – EV5 Assembly is available on our website here.
The W&H Lexa Main Board with Temp Sensors can be found here on our website.
The W&H Lexa Water Pump can be found here on our website.
The W&H Lexa Steam Generator Temp Sensor is available here on our website.
The W&H Lexa Door Gasket is available here on our website.
The W&H Lexa Water Level Sensor can be found here on our website.
Error Code 423
Description – H20 overconsumption during HEA1 phase.
Possible Causes
A.) Door gasket failure.
B.) Water pump failure.
C.) Check/priming ULKA valve failure.
D.) Failure of the clean water MIN level sensor.
E.) S.G. temperature sensor failure
F.) Steam generator failure.
G.) Solenoid valve EV5 failure.
H.) Solenoid valve EV1 failure.
I.) EV5/EV1 tube line clogged/dirty
J.) Pressure transducer failure.
K.) Multiple failure: solenoid valve EV3 and check valve V1.
L.) Leakage (e.g. chamber)
Checks and Actions
A.) Check and replace the door gasket if needed.
B.) See Test instructions service book, chapter SPECIFIC TESTS FOR INDIVIDUAL COMPONENTS, Water pump. Replace the water pump if needed.
C.) See Test instructions service book, chapter SPECIFIC TESTS FOR INDIVIDUAL COMPONENTS, Water pump. Replace the ULKA valve if needed.
D.) See Test instructions service book, chapter SPECIFIC TESTS FOR INDIVIDUAL COMPONENTS, Water level sensors. Replace the sensor if needed.
E.) See Test instructions service book, chapter SPECIFIC TESTS FOR INDIVIDUAL COMPONENTS, Steam generator temperature sensor. Replace the sensor if needed.
F.) Run the diagnostic cycle S. G. Perform. Test. If necessary, replace the steam generator.
G.) Check the components conditions. Replace the components if necessary.
H.) Check the components conditions. Replace the components if necessary.
I.) Check the tube line conditions. Replace the components if necessary.
J.) See Test instructions service book, chapter SPECIFIC TESTS FOR INDIVIDUAL COMPONENTS. Replace the sensor if needed.
K.) Check the components conditions. Replace the components if necessary.
L.) Run a 270°F sterilization cycle with maximum load and check for leaks during the pressure and process phases. The check should be done visually (water drops, steam sprays). Fix any detected leak.
The W&H Lexa HEPA Filter is available on our website here.
The W&H Lexa Solenoid Valve EV1 – EV5 Assembly is available on our website here.
The W&H Lexa Main Board with Temp Sensors can be found here on our website.
The W&H Lexa Water Pump can be found here on our website.
The W&H Lexa Steam Generator Temp Sensor is available here on our website.
The W&H Lexa Door Gasket is available here on our website.
The W&H Lexa Water Level Sensor can be found here on our website.
Error Code 424
Description – H20 overconsumption during HEA2 phase.
Possible Causes
A.) Water pump failure
B.) Check/priming ULKA valve failure.
C.) Failure of the clean water MIN level sensor.
D.) S.G. temperature sensor failure
E.) Main board failure
Checks and Actions
A.) See Test instructions service book, chapter SPECIFIC TESTS FOR INDIVIDUAL COMPONENTS, Water pump. Replace the water pump if needed.
B.) See Test instructions service book, chapter SPECIFIC TESTS FOR INDIVIDUAL COMPONENTS, Water pump. Replace the ULKA valve if needed.
C.) See Test instructions service book, chapter SPECIFIC TESTS FOR INDIVIDUAL COMPONENTS, Water level sensors. Replace the sensor if needed.
D.) See Test instructions service book, chapter SPECIFIC TESTS FOR INDIVIDUAL COMPONENTS, Steam generator temperature sensor. Replace the sensor if needed.
E.) See Test instructions service book, chapter SPECIFIC TESTS FOR INDIVIDUAL COMPONENTS:
- Water pump (step 3),or
- Heating element of the steam generator and safety thermostat (step2), or
- Steam generator temperature sensor (steps 2, 5 and 6).
Replace the main board if needed.
The W&H Lexa Main Board with Temp Sensors can be found here on our website.
The W&H Lexa Water Pump can be found here on our website.
The W&H Lexa Steam Generator Temp Sensor is available here on our website.
The W&H Lexa Water Level Sensor can be found here on our website.
Error Code 430
Description – Fan error.
Possible Causes
A.) Fan disconnected.
B.) Fan blade jammed.
C.) Fan motor failure.
D.) Main board failure.
Checks and Actions
A.) Check the connection to the board and the relevant wires.
B.) See Test instructions service book, chapter DIAGNOSTIC CYCLE/LEAKAGE TESTING (2), Diagnostic cycle: fan tests (step 2).
C.) Run diagnostic cycle Fan Test. Follow the instructions given on MN-111’s screen. Replace component if needed.
D.) If the problem persists, replace the main board.
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.