Renfert SILENT EC2 Manual Del Usuario página 46

7 Troubleshooting
Trouble
en
When the device is
switched on, there is a
loud vibration noise for
approx. 8 seconds.
An acoustic signal is
emitted, the suction
unit is switched off and
a filter cleaning is per-
formed.
After switching on, the
display shows "Dust
drawer" (23, Fig. 2) and
a 3 x acoustic signal is
heard.
"Cal" is shown in the
display.
Air" is shown in the dis-
play.
"HOT" is shown in the
display.
"ELEC" is shown in the
display.
"FILt" is shown in the
display.
Dust drawer over full.
The signal for emptying
the dust drawer ap-
pears, even though it is
not yet full.
Reason
• The suction unit performs an automatic
filter cleaning sequence.
• The internal flow velocity limit was not
reached�
• After 8 hours of operation (turbine air time)
without switching off, a filter cleaning is
carried out�
• The time interval for emptying the dust
drawer has expired and the dust drawer
has not yet been emptied�
• The emptying of the dust drawer has not
yet been confirmed.
• The automatic switch-on function cannot be
set� At the selected rotational speed on the
handpiece, the difference between stand-by
current and operating current is too low�
• The automatic switch-on function cannot
be set�
• During self-diagnosis a lack of compressed
air was detected�
• The electronics have become overheated�
• Leakage: Dust drawer not airtight.
• Leakage: Second channel open although it
should be closed�
• Turbine does not run even though electron-
ics have been switched on�
• Faults in electronics�
• The fine filter is so heavily clogged that
the filter cleaning does not show sufficient
effect�
• Time interval to the "FULL" display of the
dust drawer too high�
• The set time interval to the "FULL" dust
drawer is too low�
• This is functional and requires no intervention�
• Repeat work after cleaning is finished.
• Switch off devices at the end of each working day
at the on / off switch (3, Fig� 1) ausschalten�
• Empty dust drawer and confirm by pressing the
Enter key (30, Fig� 2)�
• Confirm emptying the dust drawer by pressing
the Enter key (30, Fig� 2)�
• Adjust the switch-on threshold to a higher speed
on the handpiece�
• Operate the device manually (see chapter 5�2)�
• Check the air pressure connection� When com-
pressed air is available again, clear error mes-
sage pressing the menu key (20)�
• Switch off the device and let it cool down�
• Provide adequate cooling, e�g�
- Chapter 4�2�
- Use external exhaust air duct (see chapter 4�7)�
- Change the fine filter (see accessories as well
as chapter 6�3)�
• Check the correct fit of the dust drawer (see
chapter 6�2)�
• Check compressed air pinch valves�
• Clean the air filter (see chapter 6.5).
• Check that the pinch valve in the unused channel
is closed�
• Check whether the turbine cable is properly
plugged in (especially after changing the turbine)�
• Contact Renfert / Service�
• Change the fine filter (see accessories as well as
chapter 6�3)�
• Set a shorter time interval (see chapter 5�4�2)�
• Set a longer time interval (see chapter 5�4�2)�
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Solution