Diagnose and Fix Error HMS_0702-0100-0001-000C in the AMS
When your 3D printer displays the code HMS_0702-0100-0001-000C, the Automatic Material System (AMS) warns you of a critical problem: it cannot regenerate its internal desiccant. This process, which cyclically heats the absorbent material, has failed. As a result, humidity increases inside the bins, and the filament begins to absorb water, directly degrading the quality of your parts. 🚨
Understand the Root Cause of the System Failure
The AMS relies on a thermal cycle to reactivate the desiccant that dries the air around the filament. If this internal heater or its control circuit has an anomaly, the system triggers the alert. This is not just a message, but a defense against humidity that can ruin your projects. The environment is no longer controlled, and the printing material becomes vulnerable.
Initial Steps for Diagnosis:- Confirm that the AMS lid seals hermetically and that the desiccant filters are properly placed and not completely saturated.
- If the previous check is correct, the problem is usually located in the heater component or its wiring.
- Turn off and completely unplug the printer before any internal inspection to ensure safety.
An AMS that doesn't control humidity is like filament exposed to the elements; both end up absorbing problems.
Repair Procedure and Verification
With the printer disconnected, carefully open the AMS unit. Locate the heater module and examine its connection. A visual diagnosis may reveal the cause.
Key Elements to Check:- Wiring and Connectors: Inspect for loose, disconnected cables, signs of burning, or rust on the terminals.
- Continuity Test: Use a multimeter in ohmmeter mode. Place the probes on the heater terminals. An infinite resistance reading (open circuit) confirms that the element is broken and needs replacement.
- Overheating Damage: Check the area around the heater and the control board for discoloration or burnt smell.
Prevent the Error from Recurring
Fixing the failure is only half the job. To ensure reliable long-term operation, it is crucial to handle the drying system precisely and maintain a favorable environment. Ambient humidity is the constant enemy. 🛡️
Avoid touching the desiccant with bare hands, as skin oils and moisture compromise its ability to absorb water. When not using the AMS, ensure all its bins are hermetically sealed. Store spare filament spools in zip-lock bags with additional silica gel packets. If you live in a humid climate area, consider using an environmental dehumidifier in your workshop; this measure drastically reduces the workload on the printer's integrated system and extends the life of all its components.