Carrier Integra 20X User manual

62-10892 Rev B
Truck Refrigeration
Operator’s Manual
for
20X and 35X
Road Only
Truck Refrigeration Units
with Cab Command Controller

©Carrier Corporation, 2018 - Printed in U. S. A. March 2018
Operator’s Manual
for
20X and 35X
Road Only
Truck Refrigeration Units
with Cab Command Controller

Table of Contents
Introduction
....................................................................... 1
Safety
................................................................................ 2
Unit Identification
.............................................................. 3
Keypad and Display .............................................................. 5
Unit Operation
................................................................... 6
Operating Principle .......................................................... 6
Starting
.............................................................................. 7
Temperature Setpoint
....................................................... 8
Manual Defrost
.................................................................. 9
Defrost Interval
................................................................ 10
Minimum Setpoint, Out-of-Range, and Continuous
Airflow
............................................................................. 11
Stopping the Unit
............................................................ 12
Product Loading
.............................................................. 13
Before Loading .............................................................. 13
During Loading ............................................................. 13
Recommended Transport Temperatures
...................... 15
Problems and Alarms
...................................................... 16
Alarm Display
.................................................................. 17
Alarm List
........................................................................ 18
Alarm Reset
.................................................................... 19
Fuses
.............................................................................. 20
Unit Maintenance
............................................................ 21
Service Schedule
........................................................ 22
Emergency Road Service
............................................... 23
Index
............................................................................... 24

Introduction
This guide has been prepared for the operator of Carrier
Transicold 20X and 35X Road Only Truck Refrigeration units with
Cab Command Controller. It contains basic instructions for the
daily operation of the refrigeration unit as well as safety
information, and other information that will help you to deliver the
load in the best possible condition. Please take the time to read
the information contained in this booklet and refer to it whenever
you have a question about the operation of your Carrier Transicold
truck refrigeration unit.
Your refrigeration unit has been engineered to provide long,
trouble-free performance when it is properly operated and
maintained. A comprehensive maintenance program will help to
insure that the unit continues to operate reliably. Such a
maintenance program will also help to control operating costs,
increase the unit’s working life, and improve performance.
This guide is intended as an introduction to your unit and to
provide general assistance when needed. More comprehensive
information can be found in the Operation and Service Manual for
your unit. This manual can be obtained from your Carrier
Transicold dealer.
When having your unit serviced, be sure to specify genuine Carrier
Transicold replacement parts for the highest quality and best
reliability.
At Carrier Transicold, we are continually working to improve the
products that we build for our customers. As a result,
specifications may change without notice.
1

Safety
Your Carrier Transicold refrigeration unit has been designed with
the safety of the operator in mind. During normal operation, all
moving parts are fully enclosed to help prevent injury. During all
pre-trip inspections, daily inspections, and problem
troubleshooting, you may be exposed to moving parts; please stay
clear of all moving parts when the unit is in operation.
WARNING
Beware of unannounced starting of the fans
caused by the thermostat and the start/stop cyc-
ling of the unit.
Refrigerants
The refrigerant contained in the refrigeration system of your unit
can cause frostbite, severe burns, or blindness when in direct
contact with the skin or eyes. For this reason, and because of
legislation regarding the handling of refrigerants during system
service, we recommend that whenever your unit requires service
of the refrigeration system you contact your nearest Carrier
Transicold authorized repair facility for service.
WARNING
Inspect battery cables for signs of wear,
abrasion or damage at every pretrip inspection
and replace if necessary. Also check battery
cable routing to ensure that clamps are secure
and that cables are not pinched or chafing
against any components.
2

The unit is identified by a nameplate which identifies the complete
model number of the unit, the serial number, the refrigerant charge
and quantity, and the date the unit was placed in service.
If a problem occurs, please refer to the information on this plate,
and make a note of the model and serial number before calling for
assistance. This information will be needed when you contact a
technician or Carrier Transicold Service Engineer so that he or she
may properly assist you.
20X Nameplate
35X Nameplate
3
Unit Identication

B
C
E
D
E
A : Evaporator
A
B : Condenser
C : Cab Command control
D : Compressor
E : Vehicle battery
D
4
Unit Identication

Readout
Standby operation display (Not Applicable)
Road operation display
Manual defrost control key
Unit start-up key
Unit shut-down key
Data selection key
Selected data decrease key
Selected data increase key
Unit operation display
- Green = In-range (left half)
- Red = Alarm (right half)
5
Keypad and Display

Operating Principle
After starting up the refrigeration unit by pressing the ON key on
the Cab Command, unit start-up and shutdown are automatic.
Road operation: An open-type compressor is driven by the
engine of the vehicle. The vehicle battery powers the evaporator
and condenser fans. The unit automatically shuts down when
the engine is switched off with the ignition key.
6
Unit Operation

1. Press the ON key. Start-up may be time-
delayed.
2. Check if box temperature is displayed.
3. Check that the road operation light is on.
NOTE: If standby power cord is plugged in, the
controller will trigger a visual alarm in the form
of a flashing alarm light and readout (4), and the
unit will run in standby mode.
40°F
321
4
7
Starting the Unit

1. Press SET key to display setpoint.
2. Press + (plus) key to increase setpoint or
press - (minus) key to decrease setpoint.
3. Press SET key when desired setpoint is
displayed to lock in new setpoint.
2
1
3
8
Temperature Setpoint

1. Check that box temperature is 40°F or lower.
2. Press Manual Defrost key to initiate manual defrost.
21
9
Manual Defrost

Defrost Interval
1. Press the OFF key.
2. Press Defrost and ON key to display the
previously selected defrost interval.
3. Press -- (minus) or + (plus) key to select
defrost interval.
4. Press the SET key to validate modified value.
1
3
2
4
Defrost Interval in Hours: 0, 1, 1.5, 2, 2.5, 3, 4, 5 & 6
AUT: Microprocessor optimized automatic defrost
according to type of cargo.
10

Minimum Setpoint, Out-of-Range, and
Continuous Airflow
1. Turn unit on and press + (plus) key.
2. Press – (minus) key.
3. Press Defrost key.
4. Check that the ! light flashes green.
5. The operator can select a minimum set point. The selections are
-20° F (-28.9° C), -4° F (-20° C), or 32° F (0° C). Press + or – key
to change setting.
6. Press the SET key to save setting. Out-of-range setting will appear
next.
7. Press the + key to increase out-of-range setting. Press the
–key to decrease out-of-range setting.
8. Press the SET key to save out-of-range setting.
9. Check that the display shows ON or OFF. ON indicates That the
evaporator fan continues to run when the setpoint is reached for
constant air flow. OFF indicates the evaporator fan stops when box
temperature is within setpoint range.
10. Press the + or – key to change airflow option. Press the SET key
to save fan mode setting.
Minimum Setpoint Settings: ---20_F ( --- 2 8 . 9 _C ) , --- 4 _F ( --- 2 0 _C), or
32_F(0_C)
Out-of-Range Settings: 1.8, 3.6 or 5.4_F(1,2or3_C)
Continuous Airflow Settings: ON or OFF
4
3
2
1
11

Stopping the Unit
Press the OFF key.
1
12

Product Loading
Before Loading
•Pre-cool the body. This will remove much of the heat from
the inside of the body and give the product better protection
when it is loaded.
•Place the unit in a defrost cycle immediately before loading.
This will remove moisture accumulated on the evaporator
coil.
During Loading
•Turn the unit off!
•Check product temperature during loading.
•Ensure that the air return and supply opening remain
unobstructed.
•Leave approximately 4 to 5 inches between the load and the
front wall for air return to the unit.
•Leave at least 10 to 12 inches between the top of the load
and the ceiling to ensure there is nothing to prevent airflow
to the rear of the body.
•Load product on pallets to provide free air return to unit and
improve product protection.
Proper air circulation in the truck body (air that can move around
and through the load) is a critical element in maintaining product
quality during transport. If air cannot circulate completely around
the load, hot spots or top-freeze can occur.
The use of pallets is highly recommended. When loaded, air can
flow freely through the pallets to return to the evaporator, helping
to protect the product from heat passing thought the floor of the
truck. When using pallets, it is important to refrain from stacking
extra boxes on the floor at the rear of the truck as this will cut off
the airflow.
Product stacking is another important factor in protecting the
product. Products that generate heat – fruits and vegetables, for
example – should be stacked so the air can flow through the
product to remove the heat. This is called “air stacking” the
product. Products that do not create heat – meats and frozen
products - should be stacked tightly in the center of the trailer.
13

All products should be kept away from the side°walls of the body,
to allow air flow between the body and the load; this prevents heat
filtering through the walls from affecting the product.
It is important to check the temperature of the product being loaded
to ensure that it is at the correct temperature for transport. The
refrigeration unit is designed to maintain the temperature of the
product at the temperature at which it was loaded; it was not
designed to cool warm product.
14