Edwards nEXT730D Instruction Manual page 49

Turbomolecular pumps
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LED
Alarm LED
Serial Communications
Receive (Rx) LED
Serial Communications
Transmit (Tx) LED
CAN Status LED
Bearing LED
Note:
If an external electrical load is connected to the Normal output line, the normal LED may
illuminate.
B8J200880_D
300812671_002_C3
B8J200880_D - Technical data
Description
This red LED flashes in a sequence to indicate an error code if
a FAIL condition is preventing pump operation. The error co-
des can be used for fault finding as described in
on page 96.
This yellow LED flashes briefly whenever activity is detected
on the serial link receive line and can be used for fault finding
the serial link.
This yellow LED flashes briefly whenever the motor controller
is transmitting data on the serial link transmit line and can be
used for fault finding the serial link.
This bicolour (red and green) LED illuminates green when the
CAN communication is good and active, and red to indicate an
error preventing CAN communication.
This blue LED illuminates or flashes when a bearing service
activity is due or ongoing. Refer to
Page 49
Fault finding
Table: Bearing
LED.
08/2021 - ©Edwards Limited

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