Carrier NDK33BN0KB, Operation & Service Manual

Page: 52 / 270

62-61753-21 3-4
3.4 PRETRIP
COOL DEFROST ALARM START-STOP
E R U T A R E P M E T X O B T N I O P T E S
ALARM LIST
SELECT MANUAL
DEFROST
S U O U N I T N O C T A E H
TEST #1
2. Press the SELECT key until the MessageCenter
displays “PRESS THE = KEY TO START PRETRIP”.
3. Press the ”=” key to start PRETRIP.
4. Verify that during TEST#1 (5 seconds) the complete display is turned on and that all lights on the
Light Bar come on.
5. Verify that during the first 5 seconds of TEST#2 the buzzer comes on.
6. The remainder of Pretrip will take 7 to 15 minutes, and will run itself automatically.
START--STOP/
CONTINUOUS
1. Place SROS in the “START / RUN” position.
KEYPAD
+34.5
°
F
--20.0
XX% COMPLETE
The PRETRIP mode is for checking unit operation and
evaluating operation of all modes. It will indicate a
failure when one is detected.
TIP
A Pretrip can be started at any refrigerated
compartment temperature.
The MessageCenter displays the current test and the
% complete of the test. When the Pretrip tests are
complete the MessageCenter will display one of three
different messages:

"PRETRIP PASS" or

"PRETRIP FAIL IN TEST X" or

"PRETRIP FAILED & COMPLETE" and alarm light
is ON
Press the ALARM LIST key to review the alarms trig-
gered by the Pretrip tests.
TIP
The Pretrip test "PASS" results message will
stay displayed until a key is pressed, or until
the SROS switch is placed in the Off position.
The Pretrip test "FAIL" results message will
stay displayed until the alarms are cleared
Once Pretrip is started, the keypad keys are disabled
until Pretrip is completed.
TIP
If "CAN NOT START PRETRIP" is displayed
in the MessageCenter, check to see if the unit
is in Defrost Mode, or check the alarm list
(Section 3.11) for active shutdown alarms.
NOTE
Pretrip will run until completed, unless an
alarm occurs that causes Pretrip to be abort-
ed. Only alarms that will result in other errone-
ous alarms or will affect future Pretrip tests will
allow Pretrip to be aborted.