Cryomech Cryocooler PT410 - Page 52

Operation
7
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7
7.7.4 Run time display screen description
Run time messages are displayed on the main display screen. The number of hours the
system has operated is displayed in the bottom right hand corner.
Top line message on the
display screen
Message description
“Idling....”
Front panel or remote interface turned off helium
compressor package. All is well.
“Running Normally” Compressor is running. All is well.
“Starting...”
Compressor ON request received, and helium compressor
package will start within 10 seconds unless an error occurs,
or a stop request is received.
“Helium Over Temp Recovery
Delay…. WAIT x”
(x is a number, counting down, in
minutes & seconds. When x is zero
compressor will start)
Compressor ON request received and helium compressor
package will be able to be restarted in x amount of time
unless an error occurs, or a stop request is received. This
message will show when the helium compressor package
has encountered certain errors that require a minimum off
time, such as “Helium Temp. too high”
“You have had 6 errors in less than
an hour: mm:ss”
mm:ss indicates them minutes :
seconds until the compressor can
be reset.
The helium compressor package has entered a locked out
state due to experiencing 6 errors within one hour. The
helium compressor package cannot be restarted until the
error lockout has been reset. You must select the lockout
menu and reset the number of lockouts. In doing this you
must acknowledge the relevant errors and therefore take the
necessary steps to prevent these errors from reoccurring.
Resetting the lockout status will enforce a 30 min cool down
period before the helium compressor package can be
restarted to prevent the short
cycling of compressor module.
The lockout contributors are noted in Section 7.6.5.
7.7.5 Error diagnostics on display screen
Errors will cause the helium compressor package to stop. Errors are displayed on the bottom line of
the display screen. If more than one of the errors below is present, only the highest priority one will be
displayed. The table lists errors from highest to lowest priority. If the error is a lockout contributor, it
will be noted in the Explanation column.
Once the error condition has cleared, the helium compressor package can be restarted by pressing
the Compressor ON button.
If the error condition still exists, the helium compressor package will not restart.
Error Message Explanation
"High pressure too High!"
The high side pressure is above the high set point. Release helium
from the system.
"High pressure too Low!"
The high side helium below the low set point. Add helium to the
system.
“Low Pressure Too Low!”
The helium gas pressure is below the threshold. Add helium to the
system.