Renfert 2921-0050, Manual

Page: 26 / 195

EN - 8 -
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 protection switch (M, Fig. 4)
has been activated due to overload
(temperature, electricity).
• Motor over-temperature protector
switch activated.
• Plug on grey motor wire out of its
socket or loose.
• Suction turbine fault.
• In-house fuse blown.
• Check and replace the dust bag and fine particle
filter (Chapter 3.2 and 3.3).
• Check and reinstall the fuse.
• Check the motor protection switch, if necessary
reset.
• Change the motor if repeatedly activated.
• Check dust bag and filter, replace as required.
(Sec. 3.2 and 3.3).
• Check exhaust air filter, 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.
• Check plug (Fig. 26).
• Carry out self-diagnosis (chapt. 3.5), at fault „E2“
exchange suction turbine (see spare parts list).
• Replace the in-house fuse.
• Check the total power consumption of the dust
extractor plus dust-generating devices.
Dust extractor stops
suddenly, for no apparent
reason. E4 is indicated on
the display.
• The electronics may be overheated
due to excessively high ambient
temperature, e.g., if the unit is
installed in a cabinet.
• Allow the extractor to cool down.
• Attempt to improve the ventilation conditions. Refer
also to Sec. 1.1.
After switching on the
unit, the display immedi-
ately indicates E4.
• Temperature sensor fault.
• After overheating, the device has
not yet cooled down sufficiently.
• Have the device repaired.
• Disconnect the device and let it continue to cool
down.
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 fine particle filter, replace as
required. (Sec. 3.2 and 3.3.1).
• Remove obstruction from the suction hose.
• Replace the suction turbine (Sec.3.6).
Insufficient extraction
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 fine particle filter, 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.