Troubleshooting
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300554859_002_C0 - 11/2016 - © Leybold
6 Troubleshooting
Parameter 171 contains in the case of an error the corresponding error code. For the respective error, the correspon-
ding rotor frequency and the corres ponding number of operating hours at that point of time the error has occurred is
saved under the parameters 174 and 176 at the same index number.
Listed in the following are the possible error codes and their causes.
Error
code
Designation
Possible cause
Remedy
1
Overspeed warning. The actual frequen-
cy exceeds the setpoint by over 10 Hz.
Frequency converter defective Contact Leybold Service.
2
Pass through time error
The pump has not reached the mini-
mum speed after the maximum run-up
time has elapsed.
Forevacuum pressure too
high.
Gas flow too high
Rotor blocked
Check the ultimate pressure of the backing
pump and install a bigger backing pump if
req.
Seal leak, check process
Check if the rotor turns freely. Contact Leybold
Service if the rotor is damaged or blocked.
3
Bearing temperature error. The maxi-
mum permissible bearing temperature
was exceeded.
Forevacuum pressure too
high.
Gas flow too high
Fan defective
Water cooling switched off
Check the ultimate pressure of the backing
pump and install a bigger backing pump if
req.
Seal leak, check process
Replace fan
Switch on water cooling
4
Short circuit error
5
Converter temperature error
Overtemperature at the power output
stage or within the frequency converter
Ambient temperature too high
Poor cooling
Ensure max. ambient temperature of 35°C
Improve cooling
6
Run-up time error
The pump has not reached the normal
operating frequency after the maximum
run-up time.
Forevacuum pressure too
high.
Gas flow too high
Check the ultimate pressure of the backing
pump and install a bigger backing pump if
req.
Seal leak, check process
7
Motor temperature error
The motor temperature has exceeded
the shutdown threshold.
Forevacuum pressure too
high.
Gas flow too high
Fan defective
Water cooling switched off
Check the ultimate pressure of the backing
pump and install a bigger backing pump if
req.
Seal leak, check process
Replace fan
Switch on water cooling
8
Pump error: The pump could not be
identified or no pump has been con-
nected.
Pump not correctly con-
nected to the frequency con-
verter.
Defective hardware
Check the connection between pump and
frequency converter.
Contact Leybold Service.
61
Bearing temperature warning, top
82
Fan voltage has failed
83
Motor temperature low warning
84
Motor overtemperature warning
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