¶ Issue Description
The filter switch flap controls whether air circulates through the filter. This HMS alert triggers when the flap fails to open or close as expected.
¶ Troubleshooting
¶ Tools, Equipment and Materials
H2.0 Allen key
¶ Fault Isolation Process
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If the filter switch flap cannot open/close → the filter switch flap is abnormal
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If the filter switch flap moves freely → the filter switch flap Hall sensor or magnet is abnormal
¶ Solutions
Users may adjust the order of these solutions as needed.
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Check if there is any foreign object stuck in the filter switch flap/the servo itself moves abnormally.
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Check if the Hall sensor and magnet are installed properly and if the sensor cable is detached.
¶ Step 1: Check if there is any foreign object stuck on the filter switch flap
For further troubleshooting steps, you may first refer to this Wiki article to remove the activated carbon filter cover and filter: Replace H2D Activated Carbon Filter Cover/Activated Carbon Filter.
You can check for any foreign objects near the filter switch flap that may prevent it from opening or closing properly.
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If foreign objects are found, remove them and retest to see if normal function resumes.
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If the filter switch flap is damaged, you may refer to this Wiki article for replacement: Repalce Right Inner Lining/Chamber Heater Unit/Chamber Heat Circulation Fan.
The heating assembly spare part includes the filter switch flap. If the flap is damaged, we recommend replacing the heating assembly.
¶ Step 2: Check Servo and Hall Sensor Operation
The servo connector and Hall sensor share a single connector to the MC board. If the filter switch flap appears functional in Step 1, but you still encounter one of the following issues:
- Filter switch flap fails to open/close:
First, refer to this Wiki article to remove the printer rear panel and purge chute:Replace H2D Purge Chute*
Check if the servo connector is properly connected (refer to the images below). If loose, firmly reinsert and retest.
- Filter switch flap moves but HMS alert remains:
If the filter switch flap can be opened/closed, but still reports an error, it may be that the Hall sensor is abnormal. You can refer to the figure below to check whether the connector is loose. If the connector is loose, it is recommended to plug it in tightly and try again to check whether it can return to normal.
¶ Equivalent Codes
The following HMS codes represent the same type of issue.
| HMS Code | Description |
|---|---|
| 0300-C000-0001-0002 | Filter Switch Flap malfunction: it may be stuck. |
¶ End Notes
We hope the detailed guide provided has been helpful and informative.
If this guide does not solve your problem, please submit a technical ticket, will answer your questions and provide assistance.
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