Fronius FK 4000, Operating Instructions Manual, Page: 38 / 52

Every 6 months in 3-shift operation with ethanol-based coolant
- Gas purge the cooler
- Change the coolant
Every 12 months in single-shift operation with ethanol-based coolant
- Change the ethanol-based coolant
Every 12 months in 3-shift operation with FCL 10/20 coolant
- Change the coolant
Every 24 months in single-shift operation with FCL 10/20 coolant
- Change the coolant
Gas purge the
cooler
Gas purging the cooler:
NOTE!
For the sake of clarity, the cooling unit is shown in the following figures without
the power source.
However, the power source can remain on the cooling unit when gas purging the cooler.
Always follow the instructions in the "Safety" section at the start of the "Care, mainten-
ance and disposal" chapter.
NOTE!
Risk of damage to electronic components.
Do not bring air nozzle too close to electronic components.
(1)
- Remove the unit side panels and
clean the cooler (1)
If a large amount of dust has accumulated:
-
Remove device side panels and clean inside of device with dry reduced compressed
air
Changing the
coolant
Changing the coolant:
NOTE!
The coolant must not be disposed of in the public sewage system.
Dispose of coolant in accordance with the applicable local and national regulations.
NOTE!
Use only original Fronius coolant when refilling the cooling unit.
1
Undo the screw cap on the fill nozzle
38