Renfert SILENT TS Mode D'emploi page 34

6.3.3 Replacing the Electronics Filter
Cooling air for the unit's electronics passes through the electronics filter. The type of material trapped by
en
the filter and the degree of contamination depend on the ambient laboratory conditions.
The filter should be examined annually and replaced, as necessary:
• Press on the two lock tabs on the filter cassette and pull the cassette off towards the rear of the unit
(Fig� 24)�
• Properly dispose of the filter and the filter cassette.
Always comply with all local ordinances governing proper disposal and accident prevention!
Depending on the filter contents, protective clothing may be required.
• Install a new filter cassette and filter on the opening.
• Make sure the filter cassette is properly seated and locked in place on both tabs.
6.4 Fuses
Instead, two device overload switches, (L, Fig� 4) are provided to protect these units�
Press the button to reset a switch which has tripped�
6.5 Self-diagnosis
The dust extractor is equipped with a self-diagnosis, which checks various functions and displays errors
on the display (G)�
Before the diagnosis takes place, insert a new dust bag and ensure that the fine filter is clean and
the suction pipe is not blocked.
Activate the self-diagnosis:
• Switch Silent TS off;
• Press and hold the operating mode selector switch (D) and switch Silent TS on (Fig� 7a)�
• For approx� 3 sec�:
- all LED displays are illuminated,
- An „8" is indicated in the display
- The signalling device gives an acoustic signal�
• A "d" appears on the display during the unit's self-test (Fig. 7b). During this time, the unit's electronics
check various internal elements and functions. The suction turbines will briefly run at Level 1 during this
test phase�
• If no errors are detected, the Silent TS automatically goes into the previously selected operating mode
at the end of the self-test (after approx� 10 sec�)�
• If an error is detected during the self-test, a flashing "E" will appear on the display, together with a num-
ber (1 to 3)�
• These indicate:
- E1: A irflow sensor fault; have the unit repaired.
- E2: Plug on grey motor wire out of its socket (Fig� 26) or suction turbine fault� Replace suction turbine if
necessary (refer to the spare parts list)�
- E3: Error in the electronics; have the unit repaired�
• In this case, the Silent TS remains in the self-diagnosis mode until it is switched off at the OFF
switch (A)�
6.6 Replace the suction turbine
The suction turbine is encased in an encapsulating housing to form a single unit, thus allowing it to be
easily replaced without the need for any tools�
Before opening the unit, disconnect it from the mains power supply by unplugging the power cord
from the wall outlet.
The motor may be hot. Allow the motor to cool off before proceeding.
The suction turbine may only be operated when it is installed in the unit. Only an authorized elec-
trician may perform a functional inspection of or repair the unit.
Please observe the documents included with the spare part!
• Turn the lock knob 90° anticlockwise (Fig� 25)�
• Remove the motor compartment cover�
• Open the fixing clip and remove the motor plug (Fig. 26).
• Loosen the two internal, grey knurled nuts (Fig� 27) and unscrew them approx� 1 cm� These knurled
nuts do not need to be completely removed�
• Release the suction turbine by turning it anticlockwise, then pull it straight out towards the back (Fig� 28)�
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