Maintenance; Cleaning The Cabinet; Cleaning The Heatsink - Danfoss UNILYNX ULX 3600i Indoor Benutzerhandbuch

4. Maintenance

4. Maintenance
4.1. Maintenance
Normally, the ULX indoor inverters need no maintenance or calibration. It should be ensured,
however, that the cooling is not obstructed and that the inverter is kept dry at all times.
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To ensure the functionality of the DC-switch, all switches should be switched on and off (by turning
the switch to on and off positions ten times) once a year, to clean the contacts.
If it becomes wet, wipe it dry immediately. Liquids may contain substances that corrode the elec-
tronics.

4.1.1. Cleaning the Cabinet

Clean inverter and integrated display with a soft cloth. Do not use aggressive chemicals, cleaning
solvents or strong detergents to clean the inverter.

4.1.2. Cleaning the Heatsink

In order to secure proper function and long inverter life, it is essential that the free air circulation
around the heat sink at the back of the inverter is not obstructed.
If the free air circulation is obstructed, e.g. by dust, this has to be removed. Clean the heatsink
by means of a soft cloth or a brush. Do not use aggressive chemicals, cleaning solvents or strong
detergents to clean the inverter.
Note:
Do not cover the inverter.
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The heatsink can reach a temperature of more than 80°C during operation. Touching
components of this temperature may result in serious injuries!