Carrier 69NT40-541-306, Операция и обслуживание

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4–31 T-354
P10-1
Frozen Mode
(Pull Down) Test
Setup: When the container temperature is greater than or equal to the 7.2

C
(45

F) set point which was set in the Frozen Mode Setup Test, the left display will
read "P10-1" and the right display will show the return air temperature. The set
point will then be changed to -17.7

C (0

F). The unit will then have a maxi mum
of three hours to pull the container temperature down to the -17.7

C set point.
Pass/Fail Criteria: If this occurs within the three hour time limit, the test pass-
es. If pulldown is not completed within the three hour time, the test fails.
P10-2
Frozen Mode
Maintain
Temperature Test
Setup: After the unit has successfully completed frozen pulldown test, the left
display will read "P10-2" and the right display will show return air temperature.
The unit will then be required to maintain -17.7

C (0

F) temperature within
+/-0.5

C (0.9

F) of set point until a DataCORDER recording is executed.
The recorder return probe temperature running total (and its associated count-
er) will be zeroed for the remainder of the recording period at the start of this
test, so that the actual recorded value will be an average of only this test's re-
sults.
Once the recording interval is complete, the average return temperature will be
recorded in the DataCORDER, and 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 temperature is out
side of the tolerance range at the DataCORDER recording, the test fails.
Table 4–7 Controller Pre-Trip Test Codes (Continued)
CODE TITLE DESCRIPTION