3-4
Pretrip Inspection
Operating Instructions
CSR-20 & CSR-40, September 1999
9.
Optional: Check water level in humidity system tank.
Add only demineralized or distilled water to prevent plug-
ging of the atomizing nozzle.
10. Observe the unit for proper operation and functions during
Pre-load Operation.
Functional Inspection
To properly perform a Full Pretrip Test on units equipped with
the
µ
P-D controller, the container must be empty with the rear
doors closed.
1.
Start the unit (see “Starting the Unit and Adjusting the
Controller Setpoint” on page 3-5). A second sequence
start of the required loads occurs during initial start-up of
the unit.
• The status Indicator LEDs and display turn On and then
Off.
• The controller display shows “Phase Check” while it
determines the correct phase sequence. Phase selection
takes 50 to 80 seconds; or more on extremely noisy
power lines. Phase select contactor ABC and the electric
heaters, condenser fan and evaporator fans are energized
for 10 seconds. Phase select contactor ABC is then de-
energized. 30 seconds later, phase select contactor CBA
and the electric heaters, condenser fan and evaporator
fans are energized for 10 seconds. The controller then
turns OFF all unit loads and energizes phase select con-
tactor ABC or CBA.
• The setpoint and controlling air sensor temperature are
displayed.
• Controller energizes unit loads, starting the evaporator
fans. The condenser fan may also start (if required).
• If the controller calls for cooling, the compressor motor
starts. If the unit starts in Modulation Cool the modula-
tion valve opens or closes to the required setting.
• If the controller calls for heating, the electric heaters are
energized.
NOTE: If the unit does not start, turn the On/Off
switch OFF. Check power supply. Then repeat
step 1. If the unit still does not start, refer to
“Alarm Codes, Descriptions and Corrective
Actions” in the
µµ
P-D Controller chapter of this
manual.
2.
Check controller setpoint for proper setting. Adjust if
necessary.
3.
Check the direction of the condenser airflow (see
“Condenser Fan and Evaporator Fan Rotation” in the
Electrical Maintenance chapter of this manual).
4.
Check direction of evaporator airflow (see “Condenser
Fan and Evaporator Fan Rotation” in Electrical
Maintenance chapter of this manual).
5.
Perform a Full (or Extended) Pretrip Test to check the unit
refrigeration and electrical systems for proper operation. :
NOTE: An Extended Pretrip test can take up to 7
hours to complete.
• Press the PRETRIP key. The left display flashes
“ENTER” and the right display flashes “PTRIP”.
• Press the ENTER key. “LOAD PTRIP” briefly appears
in the display.
NOTE: If Alarm Code(s) are stored in the con-
troller when the ENTER key is pressed, the dis-
play briefly shows “CLEAR ALARM”. The display
then returns to the Standard Display. Correct the
alarm condition(s) and clear the alarm code(s)
before attempting a Pretrip Test.
NOTE: To perform an Extended or Single Pretrip
Test, see “Pretrip Tests” in the
µµ
P-D Controller
chapter of this manual.
• The controller then performs the Full (or Extended)
Pretrip Test.
NOTE: If the container temperature is below 0 C
(32 F), the controller places the unit in the HEAT
mode when a Full or Extended Pretrip Test is ini-
tiated. The test begins when the container tem-
perature increases to 0 C (32 F).
• Observe the unit for proper operation and functions dur-
ing pretrip test.
• If the unit passes the Full Pretrip test, “PTRIP PASS” is
stored in the datalogger memory and the unit returns to
normal operation. A Start of Trip (SOT) marker is also
recorded in the data logger memory when an automatic
Full or Extended Pretrip is successfully completed.
• If an operating problem is encountered during the Full
Pretrip Test, the Alarm LED will turn ON, “PTRIP
FAIL” is stored in the datalogger memory and the unit
returns to normal operation (unless a shutdown fault has
occurred). View and correct any alarm conditions. Then
clear the Alarm Code(s) and repeat the pretrip test.
