The set rotation speed is selected via the parameter
[P:707]
in the range
25 to 170 %
of the set rotation
speed. As of a speed higher than the set rotation speed (> 100%), increased pump wear is possible.
The rotation speed setting mode has priority over the stand-by mode.
Set the rotation speed setting mode
1. Set the parameter
[P:707]
to the required value in %.
2. Set the parameter
[P:026]
to "1".
3. Query the set rotation speed via parameter
[P:309]
or
[P:398]
.
8.5 Operation monitoring
8.5.1 Operating mode display via LED
The LED on the electronic drive unit indicates the basic operating conditions. A differentiated malfunc-
tion and warning display is possible only for operation with DCU or HPU.
Display
Activity
Meaning
None
● No adequate power supply
10% active, 1 Hz
● No errors
● Vacuum pump "OFF"
● Vacuum pump stationary
50 % active, 1 Hz
● No errors
● Vacuum pump "OFF"
● Vacuum pump still rotating
90 % active, 1 Hz
● No errors
● Vacuum pump "ON"
● Set rotation speed not reached
100% active
● No errors
● Vacuum pump "ON"
● Target speed reached
50% active, 10, Hz
● Defect
Tbl. 15:
Behavior and meaning of the LED of the electronic drive unit
8.5.2 Temperature monitoring
If threshold values are exceeded, output signals from temperature sensors allow the vacuum pump to
be switched to a safe state. Depending on the type, temperature thresholds for warning and malfunction
messages are stored immutably in the electronic drive unit. For information purposes, various status re-
quests are set up in the parameter set.
● With a pump temperature T > 75 °C, the electronic drive unit reduces the motor to the nominal
rotation speed to avoid overheating of the vacuum pump.
─ "
Warning
" is displayed.
─ After cooling down (< 72 °C), the vacuum pump starts to run at set rotation speed.
● If the error threshold for excess temperature T > 85 °C is exceeded, the vacuum pump switches
off immediately.
─ A "
Malfunction message
" is displayed.
Acknowledge the malfunction
► Remove the cause of the fault.
► Switch the vacuum pump off and back on.
As an alternative, acknowledge the malfunction via Pfeiffer Vacuum display and control unit
► Set the parameter
[P:010]
to the value "0/1".
► Reset the error message with parameter
[P:009]
or by pressing the button
on the DCU.
► Switch the running vacuum pump off and back on again by pressing the
on the DCU once.
Operation
35/54
