Maintenance requirement

Please describe in detail the maintenance requirements of the device or system, as well as the problem or malfunction you have experienced. Specify when and how the issue occurs, how it affects operation, and provide any other relevant information that may help with accurate diagnosis and quick repair.
For example: unusual noise, reduced performance, leakage, intermittent shutdown, or warning signals.
The more detailed the information you provide, the more efficiently we can schedule the intervention.