# Maintenance

Source: https://help.malighting.com/grandMA3/2.3/HTML/key_rack_unit_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/tip_gray-269535.png) | **Hint:**                                                  |
|                                            | The grandMA3 onPC rack-unit only requires minor attention. |

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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/important_gray-f4dfbc.png) | **Important:**                                                                                                        |
|                                                  | The intervals between maintenance may differ depending on the frequency of transport and the operational environment. |

- Disconnect all cables before cleaning; 
- Clean the surface with a dry cloth only; 
- Do not use liquid cleanser or compressed air; 
- Do not use solvent; 
- Depending on the environment, we recommend to professionally clean the device every 2 to 5 years.