# 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="/files/WwH1QIJFHvVFWIMyf7Fu" 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.

| ![](/files/ptms8XrqlQ1sUzRaOSuw) | <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.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.irs.systems/eme/manual/maintenance-and-cleaning.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.