Renfert Silent - Error List; Dust Extractor Stops Suddenly; Self-Test Returns Turbine Error; Insufficient Extraction Force

8. Error List
Error Possible cause Corrective action
Dust extractor stops
suddenly, for no
apparent reason.
• Dust extractor continued to be
used, despite “Change Filter”
indicator.
• Unit fuse blown.
• Motor over-temperature protector
switch activated.
• The electronics may be
overheated due to excessively
high ambient temperature, e.g., if
the unit is installed in a cabinet.
• Plug on grey motor wire out of its
socket or loose.
• Suction turbine fault
• In-house fuse blown.
• Replace the dust bag (Sec. 3.2). Refer also to
Sec. 2.7.
• Check fuse, replace as required (Sec. 3.4).
• Check dust bag and lter, replace as
required.(Sec. 3.2 and 3.3)
• Check exhaust air lter, replace as required.
(Sec. 3.3.2).
• Check whether suction hose is blocked. Remove
obstruction as required.
• Dust extractor can be restarted after being allowed
to cool off for approx. 1 hour.
• Allow the extractor to cool down.
• Attempt to improve the ventilation conditions. Refer
also to Sec. 1.1
• Check plug (Figure 26a).
• Run the diagnostics mode (Sec. 2.8). If an "E2"
error is indicated, replace the suction turbine
(refer to the spare parts list).
• Replace the in-house fuse.
• Check the total power consumption of the dust
extractor plus dust-generating devices.
The self-test returns a
suction turbine error,
even though the turbine
is running.
• Filter full.
• Suction hose blocked.
• Suction turbine fault
• Check dust bag and ne particle lter, replace as
required.(Sec. 3.2 and 3.3.1)
• Remove obstruction from the suction hose.
• Replace the suction turbine (Sec.3.5).

force.
• Extraction force level too low
• Filter blocked.
• Suction hose blocked.
• Dust drawer seal not tight.
• Upper front panel fails to close
properly.
• Suction hose damaged.
• Increase the extraction level (Sec. 2.3).
• Check dust bag and ne particle lter, replace as
required.(Sec. 3.2 and 3.3.1)
• Remove obstruction from the suction hose.
• Check the proper seat of the dust drawer (Sec. 3.2).
• Check the dust drawer seal for damage and replace
as required (Sec. 3.1).
• Check the proper seat of the upper front panel
(Sec. 3.3.1).
• Check the upper front panel seal for damage and
replace as required (Sec. 3.1).
• Inspect the suction hose and replace as required.
“Change Filter”
indicator goes on

replaced.
• Fine particle lter blocked.
• Suction hose blocked.
• Cross-section of the dust-
generating device’s hose tting is
too small.
• Dust is too ne.
• Replace the ne particle lter (Sec. 3.3.1).
• Remove obstruction from the suction hose.
• Adjust the “Change Filter” indicator signal threshold
(Sec. 2.7.1).
• Adjust the “Change Filter” indicator signal threshold
(Sec. 2.7.1).
Dust bag ruptures. • The “Change Filter” indicator’s
sensitivity has not been adjusted
for the material being extracted.
• When adjusting the “Change Filter” indicator signal
threshold (Sec. 2.7.1), do not block the hose tting
or hose cross-section as much.