# Maintenance

Source: https://help.malighting.com/grandMA3/2.3/HTML/key_pu_maintenance.html
This is grandocs, an unofficial mirror of MA Lighting documentation. For authoritative or safety-relevant information, cite the canonical page on help.malighting.com.

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| ![](/img/grandma3/2-3/warning-b3b0cc.png) | **Warning:** All repair and service work has to be exclusively performed by qualified service technicians as live parts may be exposed when opening and/or removing coverings. Touching live parts may cause electric shock.  |

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| ![](/img/grandma3/2-3/warning-b3b0cc.png) | **Warning:** The grandMA3 processing unit has an air intake filter on the front.  Do not wash the filter. Clean it using a vacuum cleaner only. |

- Disconnect power supply before cleaning; 
- Clean the surface with dry cloth only; 
- Do not use liquid cleanser or compressed air; 
- Do not use solvent; 
- Check if the ventilation holes are blocked; 
- Depending on the environment, we recommend to professionally clean the device every 2 to 5 years.