MP-3000 Controller
84
Pre-trip (PTI) Test
NOTE: Units equipped with a water-cooled
condenser must be set to operate on air-cooled
condensing to perform a complete system
capacity test.
The MP-3000 controller contains a special PTI
pre-trip test that automatically checks unit
refrigeration capacity, heating capacity,
temperature control, and individual components
including the controller display, contactors, fans,
protection devices and sensors. The test includes
measurement of component power consumption
and compares test results to expected values. The
test takes about 2 to 2.5 hours to complete,
depending on the container and ambient
temperature.
NOTE: Correct all existing alarm conditions
and clear the alarm codes before performing a
PTI test. The controller will automatically clear
all existing alarms before beginning the PTI test.
With the U
NIT ON/OFF switch ON and the LCD
display showing the standard display (setpoint):
1. Press F3 key to enter the menu list.
Repeatedly press F2 key to scroll through
Main menu until “COMMANDS” appears in
LCD display.
2. Press F4 key to access the Commands menu.
The first command in the submenu appears in
the LCD display.
3. Press F2 or F3 key to scroll to “PTI TEST”.
4. Press F4 key to start the PTI test. LCD display
shows PTI test currently being performed. PTI
test ends automatically. Press any key on the
controller to return the unit to normal
operation.
See “CSR Pre-trip (PTI) Test Procedure” below
for a detailed description of the PTI Test. Detailed
PTI test results are stored in the MP-3000
Datalogger for later viewing. Any alarm codes
recorded during the test can be viewed through the
controller’s Alarm List menu at the end of the test.
CAUTION: The PTI test should only be
performed on an empty container!
CSR Pre-trip (PTI) Test Procedure
LED
Display
(Test No.)
LCD Display
(Shows Approx. Amps for
460V, 60 Hz Unit)
Test Description
Possible
Alarms
Duration
(Time)
P1.00
Display Test
Activated
0.1 A 0.0 A 0.1 A
Event Log for PTI begins.
All alarms are turned off.
Alarm list is cleared.
All lights and bars in display turn on.
None 10 Seconds
P1.01
Sensor Test
Activated
0.1 A 0.0 A 0.1 A
All sensors must have values within their
measuring range.
When Container ID begins with MAE,
MSF or MWC prefix, at least 1 USDA
sensor must be installed or USDA No. 1
Open alarm will be logged.
00, 01, 02,
03, 04, 05,
28, 31, 32,
33, 34, 35,
97, 98, 99,
112
10 Seconds
P1.02
Heat Test
Activated
5.2 A 5.1 A 5.2 A
Electric heaters are turned on.
Amp draw is measured and compared to
voltage:
• 4.4 Amps approx. at 400V;
• 5.1 Amps approx. at 460V.
Heater amperes are recorded in PTI log.
10, 11 10 Seconds
P1.03
Defrost
Activated
5.2 A 5.1 A 5.2 A
If evaporator sensor is below +10 C
(50 F), heat remains on until evaporator
sensor reaches +18 C (65 F).
20
1 Hour
Maximum
P1.04
Pre-Cool
Activated
12.2 A 15.1 A 15.2 A
If the return sensor is above +20 C (68 F),
unit operates in Cool until sensor
temperature is below +15 C (59 F).
22
1 Hour
Maximum
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