Carrier VECTOR 1800 MT, Operation & Service Manual

Page: 40 / 315

9
2-19 62-11039
2.8.3 Out of Range Alarm
The Out Of Range Alarm is intended to notify the driver
when the box temperature is moving away from Set
Point. The Out Of Range Alarm may be configured as an
Alarm Only, or as an Alarm and Unit Shutdown. (Refer
to Section 5.2 Configuration Mode)
Generally, before the Out of Range Alarm can be
triggered, the box temperature must have first been In
Range. In Range is defined as the temperature(s) of
one or all of the compartments having been within
±
2.7
°
F (1.5
°
C) of setpoint in the Perishable Range, or
2.7
°
F (1.5
°
C) of setpoint in the Frozen Range.
If the Out--Of_Range configuration (Refer to Section
5.2.1) is YES for shutdown, only the compartment that is
out of range will shut down IF that compartment has a
setpoint in the frozen range or has a setpoint in the
perishable range and the actual compartment
temperature is out of range is above setpoint.
If the Out--Of--Range configuration is YES for shutdown
(Refer to Section 5.2.1), all compartments will shut
down if the compartment that is out of range has a
setpoint in the perishable range and the actual
temperature in that compartment is out of range below
setpoint.
If the unit shuts down due to a shutdown alarm, the Out
Of Range Alarm will come on after the timer expires (30
or 45 minutes), and when the box temperature goes out
of range, regardless if the box temperature was ever
within setpoint range or not.
Out of Range is determined by the Functional
Parameter setting. Selections of 4
°
F (2
°
C), 5.5
°
F (3
°
C),
7
°
F (4
°
C), and OFF are available. The OFF setting
disables the Out of Range Alarm. All other settings
allow the user to determine how far away from setpoint
the box temperature may move before turning on the
Alarm. Once the box temperature has moved away
from set point by the selected amount, the Out of Range
timer begins. If the alarm is configured for Alarm Only,
after 30 minutes the alarm will be activated. If the alarm
is configured for Alarm & Shutdown, after 45 minutes
the alarm will be activated and the unit will shutdown.
In Sleep Mode, Pretrip, Diagnostic Test Mode,
Component Test Mode, or if the unit has a Door Switch,
and the door has been opened, the Out of Range Alarm
is not in use. After exiting any of these modes, or closing
the trailer or rail car door, the box temperature must
again come In Range of the set point before the Out of
Range Alarm can be activated.
In Defrost and in Start/Stop Off Cycle, the 30 or 45
minute timer does not count. Once the unit leaves these
modes, and goes into a temperature control mode
(heat, cool, or null), the timer will be reset for the full
time, allowing the unit either 30 or 45 minutes to bring
the box temperature into range before activating the Out
of Range Alarm.
Individual settings are available in functional
parameters for compartments 1, 2 and 3. (See
Table 3-2).
2.8.4 Remote Control Panel
User-friendly indicator and operator control panels
clearly show individual compartment temperatures with
easy-to-read displays.
These compact panels can be mounted to suit the
individual operator’s preferences -- on the front
bulkhead, or in the refrigerated compartment (including
in the wall itself). See Section 3.20.2 for more
information on the remote control panels.