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3-24T -309
Table 3-7 Controller Pre-Trip Test Codes (Sheet 4 of 4)
P10-0
Frozen Mode
Heat Test
Setup: If the container temperature is below 7.2_C(45_F), the set point is
changedto7.2_C and a 180 minute timer is started. The control will then be
placed in the equivalent of normal heating. If the container temperature is above
7.2_C at the start of the test, then the test proceeds immediately to test 10--1.
During this test, the control temperature will be shown in the right display.
Pass/Fail Criteria: The test fails if the 180 minute timer expires before the con-
trol temperate reaches set point --0.3_C (0.17_F). If the test fails it will not auto--
repeat. There is no pass display for this test, once the control temperature reaches
set point, the test proceeds to test 10--1
P10-1
Frozen Mode Pull
Down Test
Requirements: Control temperature must be at least 7.2_C(45_F)
Setup: The set point is changed to --17.8_C(0_F). The system will then attempt
to pull don the Control temperature to set point using normal frozen mode cool-
ing. During this test, the control temperate will be shown on the right display
Pass/Fail Criteria: If the control temperature does not reach set point --0.3_ C
(0.17_F) before the 180 minute timer expires the test fails and will auto--repeat
by starting P10--0 over..
P10-2
Frozen Mode
Maintain
Te mperature Test
Requirements: Test P10-1 must pass for this test to execute. This test is skipped
if the DATAcorder is not configured or available.
Setup: During this test, the left display will read “P10-2,” and the right display
will show the supply air temperature. A t wo hour timer i s started. The unit will
be required to m aintain the temperature to within + 0.5_C (0.9_F)/--1.3_C
(2.3_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 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 within +0.5_C (0.9_F)/-- 1.3_C
(2.3_F) of set point from test start to DataCORDER recording, the test passes. If
the average temperature is outside of the tolerance range at the recording, the test
fails and will auto--repeat by starting P 10--0 over.