Carrier VECTOR 6500 Operation & Service Manual page 170

Alarm
Steps
NO.
53 BOX TEMP OUT OF RANGE
•
TRIGGER–ON:
Condition One: If the unit is running in Pulldown Mode and the SAT is not greater than 1°F
(0.56°C) below the RAT or if the unit is running in Pull-Up Mode and the SAT is not above the RAT,
the configured action (Alarm only after 30 minutes or Alarm and Shutdown after 45 minutes) will be
activated.
NOTE: If the Out-Of-Range Alarm Functional Parameter is set to OFF, the following conditions will
not trigger an alarm or shutdown.
Condition Two: If the refrigerated compartment temperature has been within ±2.7°F (±1.5°C) for
perishable or +2.7°F (±1.5°C) for frozen of set point at least once since the unit was started and is
now further away from set point than the limit set in the Out-Of-Range Alarm Functional Parameter
[ 4°, 5°, or 7°F (2°, 3°, or 4°C)], the configured action (Alarm only after 30 minutes or Alarm and
Shutdown after 45 minutes) will be activated.
Condition Three: If a shutdown alarm occurs and the RAT is further away from set point than the
limit set in the Out-Of-Range Alarm Functional Parameter [ 4°, 5°, or 7°F (2°, 3°, or 4°C)], the
configured action (Alarm only after 30 minutes or Alarm and Shutdown after 45 minutes) will be
activated regardless if the refrigerated compartment temperature has been in-range or not.
•
UNIT CONTROL: Engine and standby Operation:
If the microprocessor is not configured for shutdown, alarm only.
If the microprocessor is configured for shutdown the unit will shutdown and alarm.
•
RESET CONDITION:
Condition 1: Auto Reset; If the unit is running in Pulldown Mode and the SAT is greater
than 1°F (0.56°C) below the RAT or if the unit is running in Pull-Up Mode and the SAT is greater
than the RAT.
Condition 2 & 3: Auto Reset when the temperature is within ±2.7°F (±1.5°C) for perishable
set points or +2.7°F (±1.5°C) for frozen set points.
For any Condition: alarm may be manually reset via Keypad OR by turning the unit off,
then back on again.
NOTE: The 30, or 45 minute timer is reset and starts again whenever:
•The unit cycles off and restarts in Start-Stop.
•The unit goes into and comes out of Defrost.
NOTE: This alarm does not go into the Inactive alarm List when it becomes inactive or is cleared.
NOTE: This alarm will not be activated in Sleep Mode.
NOTE: For Condition Two, the temperature criteria for this alarm is reset, and the refrigerated compartment
temperature must again go In Range before this alarm can be activated if any of the following occur:
•Pretrip is started.
•Set point is changed.
•A door switch or remote switch is installed and configured as a door switch, and the switch is opened indicating
that the compartment door has been opened.
Troubleshooting steps begin on the next page.
Alarm/Cause
7−37
Corrective Action
62-11389