Laurell Technologies
Operations Manual WS-400 Lite Series
All information contained in this manual is the property of Laurell Technologies Corporation® and is NOT to be edited, reproduced or
distributed without express written permission from a corporate officer.
34
3.2.3 SEAL PURGE INTERLOCK
All of our systems require at least 60 PSI (4.1 bar) of Nitrogen/CDA (Clean Dry Air) to
pressurize the labyrinth motor seal.
If Nitrogen/CDA (Clean Dry Air) is < 60 PSI (4.1
bar) the processor WILL NOT OPERATE
. The seal’s purpose is to separate the
process chamber from the motor and electronics in order to insure long service-free
operation. The gas consumption is very low (≈3 cubic feet per hour).
We recommend
a constant CDA supply even when the processor is not in use.
Nitrogen/CDA
pressure is monitored by a pressure sensor interlock. This interlock will report an “E10”
error if the pressure should drop below the 60 PSI (4.1 bar) requirement during
operation.
The interlock will not allow a new process to begin until the minimum
pressure of 60 PSI (4.1 bar) is met
.
If the purge falls below the required level while a
program is running, the program will be halted at that point, an E10 error message will
be displayed, and a
flashing
“
CDA”
will appear on the LCD display
2
, figure 3-4. Once
purge pressure has been re-established, it is necessary to press the
RUN/STOP
key on
the keypad to re-start the program.
Figure 3-4
FLASHING CDA DISPLAY
3.2.4 POWER ON LID CHECK
When powering on your equipment, the spin processor will initialize in an “END” mode.
This condition will persist until
THE LID IS OPENED
. This ensures the proper operation
of the lid switch before the spin processor can be operated (see Section 3.6, #5 for
more on “END” mode).
2
See Section 4 - Errors
Flashing CDA
