FRITSCH PULVERISETTE 19 - Manual (Page 51)

9 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.
9.1 Checklist for troubleshooting
Fault description Cause Remedy
Start button does not light up
green
No mains connection Plug in mains plug (20)
The control switch (19) is at 0 Set the control switch (19) to AUTO or HAND
Incorrect direction of rotation Reverse two phases (Ä Chapter 4.7 ‘Electrical
connection’ on page 23
Socket fuse is faulty Check socket fuse
Device fuse blown Remove the housing and replace the fuse
START button is pressed but
mill does not start up
Closing lid (6) not closed prop-
erly
Clean contact surface, close closing lid (6)
Collecting vessel (8) or adapter
for exhaust system (27) not
inserted properly
Insert collecting vessel (8) or adapter for exhaust
system (27) properly ® until safety switch (15)
engages.
The control switch (19) is set to
HAND.
Switch the control switch to AUTO.
Coarse samples were added to
the machine first and are
blocking rotor start-up.
Open grinding chamber and remove sample
material. ® Switch on device before adding
sample.
Mill stops running Motor safety switch has trig-
gered
Motor safety switch (see Ä Chapter 6.4 ‘Over‐
load of the cutting mill’ on page 37)
STOP button lights up red Incorrect direction of rotation Swap two phases in the mains plug (20)
(Ä Chapter 4.7 ‘Electrical connection’
on page 23)
Too much comminution material
in grinding chamber
Reduce feeding amount
Repairs
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