Carrier 69NT40-541-001 Operation And Service page 66

CODE # TITLE
P8-0 Perishable Mode Heat Test
Perishable Mode Pull
P8-1
Down Test
Perishable Mode Maintain
P8-2
Temperature Test
P9-0 Defrost Test
Frozen Mode
P10-0
Setup Test
T-316
Table 4–7 Controller Pre-Trip Test Codes (Continued)
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 15.65°C at the start of the
test, then the test proceeds 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
control temperature reaches set point. The display will read "P8-0," "FAIL."
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 temperature. The unit will then start to pull down the tempera-
ture 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.
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
supply air temperature. A 60 minute timer is started. The unit will be re-
quired to maintain the 0°C temperature to within + or - 0.5°C (0.9°F) of set
point until a DataCORDER recording is executed. The recorder supply
probe temperature running total (and its associated readings 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 aver-
age of only this test's results. Once a recording interval is complete, the av-
erage 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 within +/- 0.5°C. of set
point from test start to DataCORDER recording, the test passes. If the av-
erage temperature is outside of the tolerance range at the recording, the
test fails.
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 con-
sidered 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 return air temperature rises above 248°C (120°F).
Setup: 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 con-
tainer temperature 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.
DESCRIPTION
4–30