Renfert SILENT C2, Руководство пользователя, Страница: 21 / 29

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7 Troubleshooting
Trouble Reason Solution
An acoustic signal is
emitted, the suction unit
is switched off and a fil -
ter cleaning is performed
• The internal flow velocity limit was not
reached�
• After 12 hours of operation (turbine air
time) without switching off, a filter cleaning
is carried out�
• 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�
After switching on, the
display shows “Dust
drawer” (23, Fig. 2) and
a 3 x acoustic signal is
heard.
• 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.
• 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)�
“Cal” is shown in the
display.
• No switch-on threshold can be determined�
At the selected rotational speed on the
handpiece, the difference between stand-
by current and operating current is too low�
• No switch-on threshold can be determined�
• Adjust the switch-on threshold to a higher speed
on the handpiece�
• Operate the device manually (see chapter 5�2)�
Air” is shown in the dis-
play.
• During self-diagnosis a lack of com-
pressed air was detected�
• Check the air pressure connection� When com-
pressed air is available again, clear error mes-
sage pressing the menu key (20)�
“HOT” is shown in the
display.
• The electronics have become overheated� • 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)�
“ELEC” is shown in the
display.
• Leakage: Dust drawer not airtight�
• Leakage: Second channel open although it
should be closed�
• Turbine does not run even though elec-
tronics have been switched on�
• Faults in electronics�
• 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�
“FILt” is shown in the
display.
• The fine filter is so heavily clogged that
the filter cleaning does not show sufficient
effect�
• Change the fine filter (see accessories as well as
chapter 6�3)�
Dust drawer over full.
• Time interval to the “FULL” display of the
dust drawer too high�
• Set a shorter time interval (see chapter 5�4�2)�
The signal for emptying
the dust drawer appears,
even though it is not yet
full.
• The set time interval to the “FULL” dust
drawer is too low�
• Set a longer time interval (see chapter 5�4�2)�
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