Carrier 17/19EX - Manual (Page 121)

Certain conditions during shutdown will change this sequence:
• if the COMPRESSOR MOTOR LOAD is greater than 10% after shutdown, or the
starter contacts remain energized, the oil pump and chilled water pump remain ener-
gized and the alarm is displayed
• if the ENTERING CONDENSER WATER temperature is greater than 115 F (46 C) at
shutdown, the condenser pump will be deenergized after the 1CR compressor start
relay
• 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
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).