Carrier TRANSICOLD 69NT40-489, Операция и обслуживание

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Table 1-8. Pre-Trip Test Codes
TEST CODE DESCRIPTION
P Pre-Trip Initiated
P1-0 Heaters Turned On
P1-1 Heaters Turned Off
P2-0 Condenser Fan On
P2-1 Condenser Fan Off
P3-0 Low Speed Evaporator Fan
Motors On
P3-1 Low Speed Evaporator Fan
Motors Off
P4-0 High Speed Evaporator Fan
Motors On
P4-1 High Speed Evaporator Fan
Motors Off
P5-0 Probe Test
P5-1 Probe Test
P6-0 Compressor Started
P6-1 Future Expansion
P6-2 Suction Modulation Valve (Open)
P6-3 Future Expansion
P6-4 Suction Modulation Valve
(Closed)
P6-5 Suction Solenoid Valve
P6-6 Future Expansion
P6-7 Future Expansion
P6-8 Future Expansion
P7-0 High Pressure Switch Closed
P7-1 High Pressure Switch Open
P8-0 Perishable Mode Heat Test
P8-1 Perishable Mode Pull Down Test
P8-2 Perishable Mode Maintain
Temperature Test
P9-0 Defrost Test
P10-0 Frozen Mode (Setup) Test
P10-1 Frozen Mode (Pull Down) Test
P10-2 Frozen Mode Maintain
Temperature Test
1.13.1 Pre-Trip
In this mode, the unit will automatically test unit
components using internal measurements and compari-
son logic, and will provide a “PASS” or “FAIL” display to
indicate the results of each test.
If the user depresses the PRE-TRIP key, the unit
gives access to a pre-trip selection menu. The contents of
the menu is shown as follows:
For Revision Level 1013 and below:
Auto, P1, P2, P3, P4, P5, P6, rSLts
For Revision Level 1014 and above:
Auto 1, Auto 2 (Optional), P1, P2, P3, P4, P5,
P6, P7, P8, P9, P10, rSLts
If the pre-trip was last executed manually since
power up, the last menu selection will appear on the left
display. If pre-trip was not executed since power up, then
the right display will display “Auto 1” upon execution of
pre-trip. The user may scroll through the test selection
menu using the arrow keys.
A given test is selected by pressing ENTER while it is
displayed. The entire battery of tests may be run by
pressing ENTER while “Auto 1” or “Auto 2” is displayed.
During this selection mode, failure to press either an
arrow key or ENTER for 5 seconds will return the unit to
its default display, and normal operating mode.
Any test may be interrupted by pressing the UP
ARROW. This will return the user to the test selection
mode described above, and all machinery outputs will be
de-energized.
While given tests from “Auto 1” are running, PX-X
will be on the left display, where the X’s indicate the test
number and sub-test. The right display will show a
countdown time in minutes and seconds, indicating how
much time there is left remaining in the test.
For “Auto 2”, the left display will show PX-X, while
the left display will show applicable data.
a. Manual Test Operation
Individually selected tests, other than the LED/Dis-
play test will perform the operations necessary to verify
the operation of the component under test. At the
conclusion of the selected test, PASS or FAIL will be
displayed. Upon failure, the Supply and Return LED’s
will flash on alternately. This message will remain
displayed for up to three minutes, in which time a user
may select another test. If the three minutes expires, the
unit will terminate pre-trip and return to control mode
operation. Following any individually selected test, all
outputs will be de-energized.
b. Auto Test Operation From Keypad
If “Auto 1” or “Auto 2” test is initiated, then the unit
will execute a series of consecutive tests, each related to
an identifiable unit component, without any need of user
interface directly. These tests vary in length, depending
on the component under test.
When an automatic test fails, it will be repeated once
automatically. A repeated test failure will cause “FAIL”
to be shown on the right display, with the corresponding
test number to the left. The user may then press the
DOWN ARROW to repeat the test or the UP ARROW
to skip to the next test. The unit will wait indefinitely for
user input. Holding the PRE-TRIP key will terminate the
pre-trip mode operation.
When “Auto 1” is allowed to run to completion
without being interrupted, the unit will exit the pre-trip
mode, and return to normal control operation.
When “Auto 2” is allowed to run to completion
without being interrupted, the unit will terminate pre-
trip and display “Auto 2” “end”. The unit will remain
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