FRITSCH PULVERISETTE 13 premium line - Manual (Page 46)

10 Repairs
DANGER!
Mains voltage!
– Before beginning with repair work, unplug the mains
plug and protect the device against being unintention-
ally switched back on.
– Indicate repair work with warning signs.
– Repair work may only be performed by specialised per-
sonnel.
– Put safety equipment back into operation after mainte-
nance work.
10.1 Checklist for troubleshooting
Malfunction Possible cause Rectify fault
Mill does not start up No connection to mains Plug in mains plug
Mains switch off Switch on mains switch
Protection switch of the grinding
chamber is open
Close the grinding chamber properly
Protection switch of the grinding
stock container is open
Insert the grinding stock container
properly
Thermo switch has triggered Wait until device has cooled down
Fuse in control circuit Have fuse replaced by qualified tech-
nician
Disks do not rotate Gap width at 0 Set the gap width. See Ä Chapter 6
‘Using the device’ on page 23
Sample material blocking the disk Open grinding chamber and remove
sample material
Mill stops running during operation Overload! Switching off by motor
protection switch (main switch)
Cool off mill, remove grinding stock,
reduce infeed of grinding stock
Grinding chamber overfilled, jam-
ming of grinding stock that is too
large/hard
Open grinding chamber and empty
Mill has poor grinding result Grinding disk worn down Reverse direction of rotation or
replace grinding disk. See
Ä Chapter 6 ‘Using the device’
on page 23 or Ä Chapter 6 ‘Using the
device’ on page 23
Repairs
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