3--7
T-334
compressor on line. An example is alarm code “LO,”
(low main voltage), when a voltage drop of over 25%
occurs, an indication is given on the display, but the unit
will continue to run.
When an Alarm Occurs:
a. The red alarm light will illuminate for alarm code num-
bers 15, 17, 20, 21, 22, 23, 24, 25, 26, and 27.
b. If a detectable problem exists, its alarm code will be
alternately displayed with the set point on the left dis-
play.
c. The user should scroll through the alarm list to deter-
mine what alarms exist or have existed. Alarms must
be diagnosed and corrected before Alarm List can be
cleared.
To Display Alarm Codes:
a. While in the Default Display mode, press the ALARM
LIST key. This accesses the Alarm List Display Mode,
which displays any alarms archived in the Alarm
Queue.
b. The alarm queue stores up to 16 alarms in the se-
quence in which they occurred. The user may scroll
through the list by depressing an ARROW key.
c. The left display will show “AL##,” where ## is the
alarm number sequentially in the queue.
d. The right display will show the actual alarm code.
“AA##” will display for an active alarm, where “##” is
the alarm code. Or “IA##” will display for an inactive
alarm, See Table 3--6, page 3--20.
e. “END” is displayed to indicate the end of the alarm list
if any alarms are active.
f. “CLEAr” is displayed if all alarms are inactive. The
alarm queue may then be cleared by pressing the EN-
TER key. The alarm list will clear and “
-----
” will be dis-
played.
Note:
AL26 is active when all of the sensors are not
responding. Check the connector at the back of
the controller; if it is loose or unplugged, recon-
nect it, then run a pre-trip test (P5) to clear
AL26.
3.5. UNIT PRE-TRIP DIAGNOSTICS
Pre-Trip Diagnostics is an independent controller
function that suspends normal refrigeration controller
activities and provide preprogrammed test routines.
The test routines include Auto Mode testing, which
automatically preforms a pre programmed sequenced
of tests, or Manual Mode testing, which allows the
operator to select and run any of the individual tests.
CAUTION
Pre-trip inspection should not be per-
formed with critical temperature cargoes in
the container.
CAUTION
When Pre-Trip key is pressed, economy, de-
humidification and bulb mode will be deac-
tivated. At the completion of Pre-Trip activi-
ty, economy, dehumidification and bulb
mode must be reactivated.
Downloaded from
