FRITSCH PULVERISETTE 14 - Manual (Page 45)

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.
– Repair work may only be performed by specialised per-
sonnel.
– Put safety equipment back into operation after repair
work.
– Indicate repair work with warning signs.
9.1 Checklist for troubleshooting
Fault description Cause Remedy
The displays do not light up or POWER
SUPPLY does not light up
No connection to mains Plug in mains plug
Main switch is off Switch on main switch
Device fuse has switched off n Check device fuse
n Fuse is on
n Back side of device, 1 x 15 A T
START button is pressed but mill does
not start up
Excess temperature Switch off mill and allow to cool down
Safety lock was opened man-
ually
see Ä Chapter 2.6.1 ‘Opening the housing
cover without voltage supply’ on page 14
Electrical fault in the device Notify customer service
Mill stops running Switched off due to thermal
overload of the drive
Allow device to cool down and select a
lower speed
Drive was blocked Rectify malfunction in grinding chamber
Speed sensor is defective Notify customer service
The hood cannot be opened No connection to mains Plug in mains plug
Main switch is off Switch on main switch
Device fuse n Check device fuse
n Fuse is on
n Back side of device, 1 x 15 A T
Source material escapes Seal rings are soiled or defec-
tive
Clean or replace seal rings
Runs unevenly with strong vibrations Motor bearings are defective,
grinding rotor is unbalanced
Check motor and grinding rotor
Repairs
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