Pfeiffer Vacuum HISCROLL 12, Operating Instructions Manual

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12 Malfunctions
12.1 General
WARNING
Danger to life from electric shock in the event of a fault
In the event of a fault, devices connected to the mains may be live. There is a danger to life from
electric shock when making contact with live components.
► Always keep the mains connection freely accessible so you can disconnect it at any time.
Vacuum pump and electronic drive unit malfunctions always result in a warning or error message. In
both cases, you will receive an error code that you can read out via the interfaces of the electronic drive
unit. Generally, the LED on the electronic drive unit displays the operating messages. If an error occurs,
the vacuum pump and connected devices will be switched off.
Problem Possible causes Remedy
The vacuum pump will not start
up; none of the built-in LEDs on
the electronic drive unit light up
● Current supply interrupt-
ed
● Check the current supply lines.
● Incorrect operating volt-
age
● Supply the correct operating voltage.
● Electronic drive unit de-
fective
● Contact Pfeiffer Vacuum Service.
The vacuum pump fails to reach
the nominal rotation speed with-
in the run-up time
● Leakage on the vacuum
pump
1. Carry out leak detection.
2. Check seals and flange connections.
3. Eliminate leaks.
● Gas throughput too high ● Reduce the process gas load.
● Rotor not running
smoothly, defective
bearing
1. Check the vacuum pump for noise development
2. Contact Pfeiffer Vacuum Service.
Thermal load due to:
● lack of ventilation
● ambient temperature too
high
1. Check to make sure the fan is working.
─ Check the fan connecting cable for a correct fit
and damage.
2. Reduce the thermal load.
─ Ensure adequate air supply.
─ Adapt the ambient conditions.
Vacuum pump does not reach
ultimate pressure
● The vacuum pump is
contaminated
1. Contact Pfeiffer Vacuum Service.
2. Have it cleaned.
● Vacuum chamber, pipes
or vacuum pump are
leaking
1. Carry out leak detection starting from the vacuum
chamber.
2. Check seals and flange connections.
3. Eliminate leaks in the vacuum system.
● Pressure measurement
incorrect or not calibrat-
ed
● Check the pressure measurement settings.
● Calibrate the integrated pressure sensor.
─ Use a vacuum gauge for the reference meas-
urement.
● Condensate in the suc-
tion chamber
1. Check the process medium.
2. Operate the scroll pump with gas ballast.
● Seal the tip seal ● Contact Pfeiffer Vacuum Service.
● Replace the tip seal.
● Tip seal insufficiently
run in (e.g., after tip seal
replacement)
● Operate the vacuum pump with no load for a while
Malfunctions
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