Carrier NDK33BN0KB, Руководство по эксплуатации и обслуживанию

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62-61753-21 2-11
e. Return Air Temperature Sensor (RAT)
The RAT is a temperature control probe which pro-
vides the microprocessor with information on the tem-
perature of the air entering the evaporator section. The
reading is displayed, recorded in the Data Recorder
and used to control the refrigeration system. It is locat-
ed on roadside of the return air grille.
f. Supply Air Temperature Sensor (SAT)
The SAT is a temperature control probe which pro-
vides the microprocessor with information on the tem-
perature of the air leaving the evaporator section. The
reading is displayed, recorded in the Data Recorder
and used to control the refrigeration system. It is locat-
ed in the engine side supply air outlet housing.
2.6 SYSTEM OPERATING CONTROLS AND
COMPONENTS
The temperature controller is a Carrier Transicold
LogiCOLD microprocessor based controller. Once the
controller is set at the desired temperature, the unit will
operate automatically to maintain the desired tempera-
ture within very close limits.
2.6.1 Multiple Languages
The displayed language may be changed by toggling
the LANGUAGE switch. Language order is: Spanish,
French, German, Italian, Dutch, Danish, Russian, Por-
tuguese and English.
2.6.2 Automatic Start-Stop
Standard equipment includes an auto start-stop fea-
ture. This feature provides automatic cycling of the
diesel engine, which in turn offers an energy efficient
alternative to continuous operation of the engine with
control of temperature by alternate cooling and heating
of the supply air (evaporator outlet air).
2.6.3 Special Features
The following additional special features are incorpo-
rated into the Carrier Transicold LogiCOLD Micropro-
cessor:
An LCD display MessageCenter which clearly displays
all information in dot matrix form.
Unit Operation & Alarms are displayed in text (not in
codes)
Unit Data and Functional Parameters
Programmable Maintenance Hour Meters (resettable
from the Keypad)
Bright LED Alarm & Indicator Lights
Fully Automated Pretrip
Automated Micro Self-test
Data Recorder (date & time can be set from the Key-
pad)
Trip Start to record date/time of trip in Data Recorder
memory
PC card functionality for downloading data, upgrading
programming, and Configuration set up
FETs (Field Effect Transistors) that are illuminated
when a circuit is energized
Automatic Engine Starting
Functional Parameter locks
Alarms are stored in microprocessor memory for future
reference
2.6.4 Temperature Controller Component De-
scription And Location
The temperature controller consists of two modules;
the control module and the display, MessageCenter &
keypad module, and a switch board. The control mod-
ule is housed in the control box on the lower roadside
(engine side) corner of the unit. The display & keypad
module and switch board are located, for driver ac-
cess, at the lower roadside corner of the unit.
CAUTION
Under no circumstances should anyone at-
tempt to repair the Logic or Display
Boards. Should a problem develop with
these components, contact your nearest
Carrier Transicold dealer for replacement.
a. Control Module
The control module (see Figure 2-5) consists of the
microprocessor (with status LED), 3 fuses (F1, F2, &
F3), a DC current sensor (CT1), 2 relays (RR & SR),
2 status LED’s (LED30 & LED31), 6 input/output con-
nectors (QC), 6 digital input/output connectors (MP), a
programming card slot (with status LED’s) and twelve
FET indicators.
The microprocessor is totally self contained and does
not contain any serviceable components. Micropro-
cessor activity can be determined by observing the
LED’s and FET’s (see Figure 2-5 and Table 5-1). If the
microprocessor is calling for a circuit to be energized,
the indicator is illuminated.
The PC card slot allows programming of the micropro-
cessor using Carrier Transicold PC Cards. The con-
troller automatically detects the presence and type of
PC Card inserted and responds accordingly. The dif-
ferent types of PC Cards are:

Download Card for copying unit data from Data
Recorder.

Options PC Card for installing optional software
programs

Configuration PC Card for setting the Microproces-
sor Functions, Configurations and Data Recorder
Configurations.

Program PC Card for upgrading the microprocessor
software.