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g) Replacing the fuse
If it is no longer possible to switch on the mains power supply, the mains fuse
has probably tripped.
Proceed as follows to replace the mains fuse:
1. Switch off the mains power supply and remove all the connection and power cables.
2. Use a suitable screwdriver for slotted screws to prise out the fuse holder on
the rear of the device.
3. Replace the defective fuse with a new fine-wire fuse (5 x 20 mm) of the same
type and rated current, which is as follows: F 3.15 A / 250 V (fast blowing).
4. Press the fuse-link back into the fuse holder until it snaps in properly.
9. Troubleshooting
By purchasing the switched-mode mains power supply you have acquired a product that is reliable and operation-
ally safe. However, problems and malfunctions may occur. For this reason we want to describe how to troubleshoot
potential malfunctions:
Always heed the safety instructions!
Any other repair work must always be carried out by qualified experts familiar with the hazards involved and
with the relevant regulations. Unauthorized modifications and repairs of or inside the device lead to expiry
of the warranty.
Malfunction
adfadf
The mains power supply
does not work
Connected consumers do
not work
The output voltage of 13.8 V
cannot be changed
Periodically check the technical safety of the device, e.g. check for damage to the housing etc.
24
Possible cause
1
Is the green power indicator (2) of the mains power supply lit?
Check the mains voltage (you may also want to check the mains fuse in the device
or the line circuit breaker).
Correct voltage set?
Correct polarity?
Overload of the mains power supply (display 7)?
Check the technical data of the consumers.
The mains power supply has been switched to the fixed voltage mode.
Change the position of the fixed voltage switch underneath the device.
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