Carrier 19XL - Manual (Page 122)

• if the machine shuts down due to low refrigerant temperature, the chilled water pump
will stay running until the
LEAVING CHILLED WATER is greater than CONTROL
POINT , plus 5° F (3° C)
Automatic Soft Stop Amps Threshold (PSIO Software Version 09 and
Higher)
The SOFT STOP AMPS THRESHOLD closes the guide vanes of the compressor
automatically when a non-recycle, non-alarm stop signal occurs before the compressor motor is
deenergized.
If the STOP button is pressed, the guide vanes close to a preset amperage percent or until
the guide vane is less than 2% open. The compressor will then shut off.
If the machine enters an alarm state or if the compressor enters a RECYCLE mode, the
compressor will be deenergized immediately.
To activate SOFT STOP AMPS THRESHOLD, view the bottom of Service1 table. Set the
SOFT STOP AMPS THRESHOLD value to the percentage amps at which the motor will shut
down. The default setting is 100% amps (no Soft Stop).
When the SOFT STOP AMPS THRESHOLD is being applied, a status message
‘‘SHUTDOWN IN PROGRESS, COMPRESSOR UNLOADING’’ is shown.
Chilled Water Recycle Mode
The machine may cycle off and wait until the load increases to restart again when the