Troubleshooting
45300324726_002_C0 - 10/2016 - © Leybold
6 Troubleshooting
When the connector cable is attached, the outputs at the frequency con-
verter are not free of voltage.
Before you start searching for the source of the problem, you should carry
out a few simple checks:
Are the electric connections in good working order?
Is the forevacuum pressure sufficient?
After having removed the cause for the error reset the error message at the
frequency converter by applying a STOP signal via the socket CONTROL or
by switching the mains power off.
Malfunction Possible cause Corrective action Responsible
Red ERROR LED is on Forevacuum or high-vacuum pressu-
re too high.
Gas volume too great.
Bearing defective.
Ambient temperature too high.
Frequency converter faulty
EMC influence
Check the forevacuum pump and use a
different forevacuum pump if necessary.
Seal leak; install a higher-capacity
vacuum pump if necessary.
Repair the pump.
Install additional water cooling or reduce
throughput.
Replace frequency converter.
Switch the power supply voltage off and
then on again
Operator/
maintenance staff
Maintenance staff
Leybold service
Maintenance staff
Maintenance staff/
Leybold service
Operator
Yellow power LED is
not on.
No power supply
Frequency converter defective.
Check cables and power supply.
Replace frequency converter.
Operator/
maintenance staff
Maintenance staff/
Leybold service
Red LED flashes. Warning message.
Possible causes as in “Red ERROR
LED is on”
The pump can continue to run, as long as
operation limits are only exceeded for a
short time.
Operator
Yellow LED flashes. Warning message: Supply voltage
too low or too high.
The pump can continue to run. Check the
reason for wrong voltage and eliminate
the fault.
Operator/
maintenance staff
CAUTION
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