Carrier 69NT40-541-306, Операция и обслуживание

Страница: 66 / 154

T-354 4–30
P7-1
High Pressure
Switch Open
Requirement: Test P7-0 must pass for this test to execute. Setup: The con
denser fan is started and a 60 second timer is started.
Pass/Fail Criteria: Passes the test if the high pressure switch (HPS) closes
within the 60-second time limit, otherwise, it fails.
P8-0
Perishable Mode
Heat Test
Setup: If the container temperature is below 15.6

C (60

F), the set point is
changed to 15.6

C, and a 60-minute timer is started. The left display will read
"P8-0." The control will then heat the container until 15.6

C is reached. If the
container temperature is above 15.6

C at the start of the test, then the test pro-
ceeds immediately to test P8-1 and the left display will change to "P8-1."
Pass/Fail Criteria: The test fails if the 180-minute timer expires before the con-
trol temperature reaches set point. The display will read "P8-0," "FAIL."
P8-1
Perishable Mode
Pull Down Test
Requirements: Control temperature must be at least 15.6

C (60

F).
Setup: The set point is changed to 0

C (32

F), and a 180-minute timer is started.
The left display will read "P8-1," the right display will show the supply air tempera-
ture. The unit will then start to pull down the temperature to the 0

C set point.
Pass/Fail Criteria: The test passes if the container temperature reaches set
point before the 180-minute timer expires.
P8-2
Perishable Mode
Maintain
Temperature Test
Requirements: Test P8-1 must pass for this test to execute.
Setup: The left display will read "P8-2," and the right display will show the sup-
ply air temperature. A 60-minute timer is started. The unit will be required to
maintain the 0

C temperature to /-0.5

C (0.9

F) of set point until a Data
CORDER recording is executed.
The recorder supply probe temperature running total (and its associated read-
ings counter) will be zeroed out for the remainder of the recording period at the
start of this test, so that the actual value recorded in the DataCORDER will be
an average of only this test's results.
Once a recording interval is complete, the average recorder supply temperature
will be recorded in the DataCORDER, as well as stored in memory for use in
applying the test pass/fail criteria.
Pass/Fail Criteria: If the recorded temperature is /-0.5

C. of set point
from test start to DataCORDER recording, the test passes. If the average tem-
perature is outside of the tolerance range at the recording, the test fails.
P9-0 Defrost Test
Setup: The defrost temperature sensor (DTS) reading will be displayed on the
left display. The right display will show the supply air temperature. The unit will
run FULL COOL for 30 minutes maximum until the DTT is considered closed.
Once the DTT is considered closed, the unit simulates defrost by running the
heaters for up to two hours, or until the DTT is considered open.
Pass/Fail Criteria: The test fails if: the DTT is not considered closed after the
30 minutes of full cooling, HTT opens when DTT is considered closed or if re-
turn air temperature rises above 248

C (120

F).
P10-0
Frozen Mode
Setup Test
S etup: After completion of the defrost test, the testing proceeds directly to test
P10-1 if the container temperature is above 7

C (45

F). If the container tem-
perature is below 7

C, a 180-minute timer will be started, the set point will be
set to 7

C and the control will be placed in normal heat. The left display will read
"P10-0" and the unit will continue in operation until the temperature is raised to
set point.
Pass/Fail Criteria: If the temperature does not reach set point (less -0.3

C or
6.7

F) before the timer times out display will read "P100," "FAIL." The test will
not auto-repeat.
Table 4–7 Controller Pre-Trip Test Codes (Continued)
CODE TITLE DESCRIPTION