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EN
Troubleshooting
Safety
WARNING!
Work that is carried out incorrectly can cause serious injury or damage.
All the work described below must only be carried out by trained and qualified personnel.
Do not carry out any of the work described below until you have fully read and understood
the following documents:
► this document
► all the operating instructions for the system components, especially the safety rules
WARNING!
An electric shock can be fatal.
Before starting the work described below:
► turn the power source mains switch to the "O" position
► disconnect the power source from the mains
► ensure that the power source remains disconnected from the mains until all work has
been completed
After opening the device, use a suitable measuring instrument to check that electrically
charged components (e.g. capacitors) have been discharged.
WARNING!
An inadequate ground conductor connection can cause serious injury or damage.
The housing screws provide a suitable ground conductor connection for earthing the hous-
ing and must NOT be replaced by any other screws that do not provide a reliable ground
conductor connection.
CAUTION!
Danger of scalding by hot coolant.
Wait until the coolant has cooled down before carrying out any of the activities described
below.
NOTE!
Make sure that no coolant enters the device.
If there is any coolant on the exterior of the cooling unit, remove it immediately.
General If the cooling unit is fitted with one of the following options, the relevant error message ap-
pears on the power source control panel:
- Flow watchdog with coolant filter ... no | H2O (coolant flow error)
- Thermostat ... hot | H2O (coolant temperature too high)
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