Troubleshooting
59300855170_002_C8 - 08/2021 - © 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 connections in good working order?
■
Mains connection,
■
48 V DC cable to the frequency converter.
Observe the polarity.
Is the forevacuum pressure sufficient?
After having removed the cause for the error reset the error message: By
applying a STOP signal via the socket REMOTE (X1), or by a reset sequence
via the serial interface or by switching the mains power off.
The error codes can only be read if a serial interface is present.
The following table has been provided as a guide when determining the
causes of errors.
CAUTION
Malfunction Possible cause Remedy Shut
down
Yellow power LED is not
on
No DC power
DC power miswired
Frequency converter defective
Check cables and power supply
Ensure correct polarity of the DC cable.
Have the pump repaired. The following may
damage the freq. converter:
- Disconnection of the DC
cable while the pump was still rotating
- Non-compliance with the note related to con-
necting several pump to a single power supply.
—
Red LED flashes Warning message. The pump can continue to run, as long as opera-
tion limits are only exceeded for a short time. In
case of longer exceeding send pump and fre-
quency converter to the Leybold service.
no
Turbomolecular pump
does not start, ERROR
LED does not light.
Interface protocol error
No communication via the serial inter-
face.
REMOTE connector (X1) connected
wrongly.
Use USS protocol.
Connect bus as shown in the interface instruc-
tions
Observe Fig. 3.17.
—
Turbomolecular pump
produces loud running
noises and vibrations.
Rotor out of balance
Bearing defective
Balance the rotor
Replace the bearing
no
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