Carrier 69NT40-561-300, Operation And Service Manual

Page: 88 / 174

T-365 4–54
P1 Tests - Heaters Current Draw: Heater is turned on, then off. Current draw must fall within specified range. No
other system components will change state during this test.
P2 Tests - Condenser Fan Current Draw : Condenser is first verified in low speed then in high speed. Current
draw must fall within specified range. No other system components will change state during this test. If the Water
Pressure Switch is open this test will be skipped.
P3 Tests - Low Speed Evaporator Fan Current Draw : The system must be equipped with a low speed evapora-
tor fan, as determined by CnF02, the Evaporator Fan Speed Select configuration variable. Low speed evaporator
fan is turned on, then off. Current draw must fall within specified range. No other system components will change
state during this test
P0-0 Pre-Trip Initiated:
Configuration Dis-
play, Indicator
Lamps, LEDs, and
Displays Container identifier code, Cd18 Software Revision Number, Cd20 Container
Unit Model Number, & configuration database identifier CFMMYYDD are dis-
played in sequence.
Next the unit will indicate the presence or non-presence of an RMU according
to whether any RMU inquiry messages have been received since the unit
was booted.
Units equipped with Autoslide Enabled (Cnf44) will cause the vent to seek to
its closed position, followed by two sequences of opening to 100% and re-
turning to the closed position. No other autoslide mode of operation will be
available until the two cycles of opening and closing have completed.
Since the system cannot recognize lights and display failures, there are no
test codes or results associated with this phase of Pretrip. To know if the test
passes the operator must observe that the LCD display elements and the in-
dicator lights behave as described below.
CODE TITLE DESCRIPTION
P1-0 Heaters Turned On Heater starts in the off condition, current draw is measured, and then the
heater is turned on. After 15 seconds, the current draw is measured again.
The change in current draw is then recorded.
Test passes if the change in current draw test is in the range specified.
P1-1 Heaters Turned Off Heater starts in the off condition, current draw is measured, and then the
heater is turned on. After 15 seconds, the current draw is measured again.
The change in current draw is then recorded.
Test passes if the change in current draw test is in the range specified.
CODE TITLE DESCRIPTION
P2-0 Condenser Fan
High Speed Condenser fan starts in the off condition, current draw is measured, and con-
denser fan is then turned on. After 10 seconds the current draw is measured
again. After the current is measured the Condenser fan is turned off and after
10 seconds a second off measurement is taken.
Test passes if change in current draw test is in the specified range.
P2-1 Condenser Fan
Low Speed Condenser fan starts in the off condition, current draw is measured, and Con-
denser low speed fan is then turned on. After 10 seconds the current draw is
measured again. The change in current draw is then recorded. After the cur-
rent is measured the Condenser fan is turned off and after 10 seconds a sec-
ond off measurement is taken.
Test passes if change in current draw test is in the specified range.
Table 4–4 Controller Pre-Trip Test Codes
CODE NO. TITLE DESCRIPTION