# Maintenance and cleaning

In the following sections, the maintenance is described, which is required for optimal and trouble-free operation. If you have questions about maintenance work and intervals contact the manufacturer.\
Connections for higher currents must be checked for clean contacting and mechanical strength (tensile test).

| Component                                      | No. / System | After setup | Monthly | Yearly                                                     | To Do                                                                                                                                                      |
| ---------------------------------------------- | ------------ | ----------- | ------- | ---------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------- |
| <p>High current contacts</p><p>motorphases</p> | 9            | X           |         | X                                                          | Check proper connection of the ring-lugs. Do the ring lugs lie flat on the contact area? Are the nuts pulled tight? Do a manual tensile test on the cable. |
| High current contacts HV DC                    | 12           |             |         | X                                                          |                                                                                                                                                            |
| calibration                                    | 1 set        |             |         | <p>According</p><p>To aggreement</p><p>Typ. 1..3 years</p> | EME calibration needs to be done on site with calibration kit.                                                                                             |
| EME internal cooling circuit                   | 3            | x           | X       |                                                            | Check water pressure at manometer (see chapter 11.1.1). ggf. nachfüllen (siehe Kapitel 11.1.2)                                                             |

#### Cooling water pressure check <a href="#toc472694268" id="toc472694268"></a>

<img src="https://2885081809-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FASow5OW3r2Iqc4FrSPHd%2Fuploads%2FngZDPdgFgVMq7lW1uUeM%2Ffile.excalidraw.svg?alt=media&#x26;token=5b402181-7d1f-4a4f-92c7-4779d842e59f" alt="" class="gitbook-drawing">

#### Fill the cooling water <a href="#toc170750935" id="toc170750935"></a>

If the internal pressure drops below 1 bar, the internal cooling circuit must be refilled. To do so, connect a tube with ½“ fitting to the refill connection (see picture above) and fill with a water/glycol mixture with a pressure of at least 3 bar.

Optimum mixture is:

* 25% glycol
* 75% clean water

Open the valve behind the refill connection to let water/glycol mixture flow into the internal buffer. Close the valve when the manometer shows 2,5 bar. Disconnect the filling tube, and clean remnants of eventually spilled water/glycol.

| ![](https://2885081809-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FASow5OW3r2Iqc4FrSPHd%2Fuploads%2FgjceUyZZ7faa8jPIMDcp%2FISO_7010_W001.png?alt=media\&token=acbfcf3d-ae04-48b3-9563-9db6bea14a6b) | <p><strong>WARNING!</strong></p><p><strong>Beware of the health and environmental risk of glycol coolant mixture</strong></p><ul><li>Coolant mixture may never be inhaled or swallowed or get in contact with eyes</li><li>Avoid contact with your body or skin.</li><li>If you were in contact with glycol, wash yourself properly.</li><li>Coolant mixture may never get into the environment</li><li>Make sure that spilled coolant mixture is properly wiped away and dispose the cloth appropriately.</li></ul> |
| --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

### Cleaning <a href="#toc40709215" id="toc40709215"></a>

Switch off system bevor cleaning, service and maintenance and measures and secure against immediate restart.

Cool off system before cleaning and service.

The surface of devices can be cleaned with a damp cloth.

If water or is present in the drip pan, absorb it with a dry cloth.