Carrier SUPRA 950Mt User manual

Truck Refrigeration
OPERATOR’S MANUAL
For
Supra 950MT
Truck Refrigeration Units
62-11491 Rev A

OPERATOR’S MANUAL
For
Supra 950MT
Truck Refrigeration Units
© 2016 Carrier Corporation ●Printed in USA January 2016

62-11491
TABLE OF CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
UNIT IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PRE-TRIP INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
UNIT OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
STARTING UNIT - ENGINE/ROAD OPERATION . . . . . . . . . 6
STARTING UNIT - STANDBY OPERATION . . . . . . . . . . . . . 7
START/STOP OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 9
CONTINUOUS RUN OPERATION . . . . . . . . . . . . . . . . . . . . 11
CHANGING SETPOINT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
MANUAL DEFROST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
FUNCTION CHANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
UNIT DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
ALARM DISPLAY & RESET . . . . . . . . . . . . . . . . . . . . . . . . . 18
STOPPING UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
PRODUCT LOADING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
RECOMMENDED TRANSPORT TEMPERATURES . . . . . . 23
TROUBLESHOOTING TIPS . . . . . . . . . . . . . . . . . . . . . . . . . 24
CONTROL BOX COMPONENTS . . . . . . . . . . . . . . . . . . . . . 26
MULTI-TEMP SUB PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . 28
RELAY BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
UNIT MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
UNIT MAINTENANCE SCHEDULE . . . . . . . . . . . . . . . . . . . 31
EMERGENCY ROAD SERVICE . . . . . . . . . . . . . . . . . . . . . . 34

1 62-11491
INTRODUCTION
This guide has been prepared for the operator of Carrier Transicold diesel
truck refrigeration units. It contains basic instructions for the daily
operation of the refrigeration unit as well as safety information,
troubleshooting tips, 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 Supra unit.
Your refrigeration unit has been engineered to provide long, trouble-free
performance when it is properly operated and maintained. The checks
outlined in this guide will help to minimize over-the-road problems. In
addition, 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 local 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, unit specifications may
change without notice.

62-11491 2
UNIT IDENTIFICATION
Each Supra 950MT unit is identified by a nameplate attached to the frame
near the accumulator. This nameplate 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.
NAMEPLATE

3 62-11491
SAFETY
The Supra 950MT has been designed with the safety of the operator in
mind. During normal operation, all moving parts are fully guarded 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 and when the
unit main power switch is in the RUN (I) position.
WARNING
!
Unit may start automatically at any time even if the
switch is in the OFF position. Use proper lockout/tagout
procedures before inspection/servicing. All unit inspec-
tion/servicing by properly trained personnel only.
WARNING
!
Under no circumstances should ether or any other
starting aids be used to start the engine.
AUTO-START/STOP
When the unit is set for Auto-Start/Stop operation it may start at any time
and without warning. When performing any check of the refrigeration unit,
ensure that the main power switch is in the OFF (O) position.
ENGINE COOLANT
The engine is equipped with a pressurized cooling system. Under normal
operating conditions, the coolant in the engine and radiator is under high
pressure and is very hot. Contact with hot coolant can cause severe
burns. Do not remove the cap from a hot radiator. If the cap must be
removed, do so very slowly in order to release the pressure without spray.
REFRIGERANTS
The refrigerant contained in the refrigeration system 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.
BATTERY
This unit utilizes a lead-acid type battery. The battery normally vents small
amounts of flammable hydrogen gas. Do not smoke when checking the
battery. A battery explosion can cause serious physical harm and/or
blindness.

62-11491 4
PRE-TRIP INSPECTION
BEFORE STARTING ENGINE
1. Drain water and sediment from fuel tank sump and then fill tank
with diesel fuel.
2. Check radiator coolant level. Add pre-mixed 50/50 permanent
antifreeze-water as required.
3. Check evaporator and condenser coil for cleanliness.
4. Check engine oil level, lubrication and fuel filter, oil lines, and
connections for leaks. Tighten connections and/or replace gaskets.
5. Check compressor and receiver service valve position (backseat
position).
6. Check unit compartment and remove any foreign material.
7. Check V-belts for proper tension, fraying or cracks. Adjust belt or
replace.
WARNING
!
Inspect battery cables for signs of wear, abrasion or
damage at every pre trip inspection and replace if nec-
essary. Also check battery cable routing to ensure that
clamps are secure and that cables are not pinched or
chafing against any components.
AFTER STARTING REFRIGERATION UNIT
1. Check engine speed and listen for abnormal noises.
2. Check compressor oil level.
3. Observe any signs of lube or fuel oil leaks.
4. Check radiator hoses for leaks.
5. Check refrigerant level.
6. Feel filter drier. Excessive temperature drop across drier indicates
restriction.
7. Check water temperature. It should be between 150 to 180°F (65 to
82°C).

5 62-11491
UNIT OPERATION
WARNING
!
Under no circumstances should ether or any other
starting aids be used to start the engine.
Place the RSS in “RUN” position, the ON/OFF switch in “ON” position and
all COMPARTMENT switches in the “OFF” position.
The microprocessor will power up and go through a self test. It will then
show “OFF” in the display.
BOX TEMPERATURE
AUTO START/STOP
I
UNIT DATA
PRETRIP
ALARM/FAULT
STANDBYBUZZER OFF
MAN
DEFROST
CITY
SPEED
ROAD
FUNCTION ENTER
SETPOINT
O
i
COMPARTMENT 1 COMPARTMENT 2 COMPARTMENT 3
OIOIOI
OFF

62-11491 6
STARTING UNIT - ENGINE/ROAD OPERATION
1. Place the unit RUN/STOP switch in the “RUN” position.
2. Place the I/O switch in the “I” position.
3. Place the desired compartment switch(es) in the “ON (I)” position.
4. If the unit was previously used in Standby, press the ROAD key.
Under normal circumstances this is all that is required to start the unit.
The unit will then perform a complete diagnostic check on the
microprocessor controller, pre-heat for the required amount of time based
on the engine temperature and start automatically.
Complete the Pre-Trip Inspection as described in a previous section.
BOX TEMPERATURE
AUTO START/STOP
I
UNIT DATA
PRETRIP
ALARM/FAULT
STANDBYBUZZER OFF
MAN
DEFROST
CITY
SPEED
ROAD
FUNCTION ENTER
SETPOINT
O
i
--20 35° F
COMPARTMENT 1 COMPARTMENT 2 COMPARTMENT 3
OIOIOI
4
23

7 62-11491
STARTING UNIT - STANDBY OPERATION
WARNING
!
Make sure the power plug is clean and dry before con-
necting to any power source.
WARNING
!
Do not attempt to connect or remove power plug or per-
form service and/or maintenance before ensuring the
unit RUN/STOP Switch is in the STOP position, the I/O
switch is in the “O” position and the external power cir-
cuit breaker is OFF.
STANDBY GUIDELINES
For safe, reliable operation in standby mode, it is important to consider
the following guidelines:
• NEVER connect the unit to a power source with the RUN/STOP
switch in the “RUN” position.
• The power supply cable and circuit breaker must comply with the
following:
• When multiple units are in use, each unit must be operated on its
own electrical circuit. You should never operate more than one unit
on a circuit breaker.
• When preparing a circuit for operation of the refrigeration unit, a
licensed electrician should be contracted. A licensed electrician is
familiar with all local ordinances and special requirements for your
area and can ensure that the circuits are properly designed and
installed, and that connections are correct.
TIP
If unit is switched to Standby and the power plug is not
plugged in, “NO POWER” is displayed.
Operating
Voltage
FLA
Rating
Circuit
Breaker
Capacity
Cable
Requirement
230 V 60 Hz 3
phase
35 A 50 A 8/3 with ground
(up to 50 ft)

62-11491 8
STARTING UNIT - STANDBY OPERATION (CONTINUED)
1. Place the unit RUN/STOP switch in the “STOP” position.
2. Place the I/O switch in the “O” position.
3. Connect the standby cable to the unit and then turn the external
power circuit breaker on. (See table in Standby Guidelines
section.)
4. Place the desired compartment switch(es) in the “ON (I)” position.
5. Place the unit RUN/STOP switch in the “RUN” position.
6. Place the I/O switch in the “I” position.
7. Press the STANDBY key.
Under normal circumstances this is all that is required to run the unit in
standby power. The unit will then perform a complete diagnostic check on
the microprocessor controller and start automatically.
Complete the Pre-Trip Inspection as described in a previous section.
BOX TEMPERATURE
AUTO START/STOP
I
UNIT DATA
PRETRIP
ALARM/FAULT
STANDBYBUZZER OFF
MAN
DEFROST
CITY
SPEED
ROAD
FUNCTION ENTER
SETPOINT
O
i
--20 35° F
COMPARTMENT 1 COMPARTMENT 2 COMPARTMENT 3
OIOIOI
7
24
6

9 62-11491
START/STOP OPERATION
1. Check if the AUTO-START/STOP indicator is illuminated.
2. If not, press the AUTO-START/STOP toggle key to place the unit in
Start/Stop mode.
3. The AUTO-START/STOP indicator will then be illuminated.
The AUTO-START/STOP key is used to change the operating mode from
“Continuous Run” to “Auto-Start/Stop.” Each push of the key will alternate
the operating modes. The Auto-Start/Stop indicator on the display will
illuminate when Auto-Stop/Start is enabled. If the indicator is not
illuminated, the unit is in the Continuous Run Mode.
Auto-Start/Stop is provided to permit starting or restarting of the diesel-
driven compressor as required. This gives the microprocessor automatic
control of starting and stopping the diesel engine. The main function of
Auto-Start/Stop is to turn off the refrigeration system near the setpoint to
provide a fuel efficient temperature control system and then restart the
engine when needed. Refer to Recommended Transport Temperatures
for guidelines for Auto-Start/Stop and Continuous Run Operation.
BOX TEMPERATURE
AUTO START/STOP
I
UNIT DATA
PRETRIP
ALARM/FAULT
STANDBYBUZZER OFF
MAN
DEFROST
CITY
SPEED
ROAD
FUNCTION ENTER
SETPOINT
O
i
--20 35° F
COMPARTMENT 1 COMPARTMENT 2 COMPARTMENT 3
OIOIOI
2
1, 3

62-11491 10
Whenever the unit starts in Auto-Start/Stop, it will run until:
• It has run for the predetermined minimum run time.
• The engine coolant temperature is above 122°F (50°C)
• The box temperature is at setpoint.
The controller will not shut off the engine if the battery voltage is not
sufficient to restart it. Battery voltage above approximately 13.4 volts is
required for shutdown. This varies depending on ambient. Look at battery
voltage in data list to find out whether shutdown voltage has been
reached. If there is a “+” in front of the number, the voltage is enough to
shutdown and restart. If only the number appears, the voltage is still too
low for shutdown.
The controller will restart the engine if any of the following criteria have
been met:
• Box temperature has changed by ± 11°F (± 6.1°C) for setpoints in
the perishable range and +11°F (+6.1°C) for setpoints in the frozen
range DURING minimum off time.
• Box temperature has moved away from setpoint by ± 3.6°F (2.0°C)
AFTER minimum off time for setpoints in the perishable range or
+0.5°F (0.3°C) for setpoints in the frozen range.
• The battery voltage drops below 12.2 VDC. (Refer to Unit Data
section).
• The engine coolant temperature drops below 34°F (1°C).
To start the unit in manual start mode, the unit must be in Continuous Run
mode and the Auto/Manual Start Operation function parameter set to
“MAN OP” (FN10 OFF).
NOTE
When configuration CNF11 is “ON” and setpoint is 32 to 42°F
(0 to 5.5°C) the unit is locked into Continuous Run. The
AUTO-START/STOP key is disabled.
NOTE
Auto Start-Stop operation may be tied to the setpoint ranges
for frozen and perishable loads and the AUTO-START/STOP
key may be locked out.

11 62-11491
CONTINUOUS RUN OPERATION
1. Check if the AUTO-START/STOP indicator is illuminated.
2. If it is, press the AUTO-START/STOP toggle key to place the unit in
Continuous Run mode.
3. The AUTO-START/STOP indicator will not be illuminated.
In the Continuous Run mode, the diesel engine will run continuously
providing constant air flow and temperature control to the product. Refer
to Recommended Transport Temperatures for guidelines for Auto-Start/
Stop and Continuous Run Operation.
Continuous operation may be tied to the setpoint ranges for frozen and
perishable loads and the AUTO-START/STOP key may be locked out.
BOX TEMPERATURE
AUTO START/STOP
I
UNIT DATA
PRETRIP
ALARM/FAULT
STANDBYBUZZER OFF
MAN
DEFROST
CITY
SPEED
ROAD
FUNCTION ENTER
SETPOINT
O
i
--20 35° F
COMPARTMENT 1 COMPARTMENT 2 COMPARTMENT 3
OIOIOI
2
1

62-11491 12
CHANGING SETPOINT
Settings for C1 and C2 will alternate every 5 seconds. Wait until the
desired compartment is displayed and then perform the following:
1. Press the UP or DOWN arrow keys to increase or decrease the dis-
played setpoint.
2. Press the ENTER key when the desired setpoint is displayed to
lock in the new setpoint.
3. A new setpoint will flash and then return to the original setpoint if
the ENTER key is not pressed within 5 seconds.
Setpoints of -22°F to +89°F (-30°C to +32°C) may be entered via the
keypad. The controller always retains the last entered setpoint in memory.
If no setpoint is in memory (i.e. on initial startup), the controller will lock
out the run relay and flash “SP” on the left hand display until a valid
setpoint is entered. The setpoint may be changed up or down in 1°
increments by pressing and releasing either the UP ARROW or DOWN
ARROW key.
You cannot change setpoint when unit is in Pretrip or when viewing Unit
Data or Functional Parameters.
BOX TEMPERATURE
AUTO START/STOP
I
UNIT DATA
PRETRIP
ALARM/FAULT
STANDBYBUZZER OFF
MAN
DEFROST
CITY
SPEED
ROAD
FUNCTION ENTER
SETPOINT
O
i
--20 35° F
COMPARTMENT 1 COMPARTMENT 2 COMPARTMENT 3
OIOIOI
12

13 62-11491
MANUAL DEFROST
1. Press the MANUAL DEFROST key to initiate a defrost.
The defrost mode may be initiated in three different ways if the evaporator
coil is below 45°F (7.2°C):
1. Defrost is initiated automatically at preset intervals by the defrost
timer in the microprocessor.
2. Defrost is initiated by the defrost air switch.
3. Defrost may be manually initiated by pressing the MANUAL
DEFROST key.
The defrost mode terminates when the evaporator temperature is higher
than 55°F (12.8°C). Should the defrost cycle not complete within 45
minutes, the defrost cycle is terminated automatically by the
microprocessor.
After the 45 minute termination, the controller will wait 1.5 hours before
attempting another defrost cycle. Pressing the MANUAL DEFROST key
will override this mode and start a defrost cycle. If a shutdown alarm
occurs, defrost will be terminated.
BOX TEMPERATURE
AUTO START/STOP
I
UNIT DATA
PRETRIP
ALARM/FAULT
STANDBYBUZZER OFF
MAN
DEFROST
CITY
SPEED
ROAD
FUNCTION ENTER
SETPOINT
O
i
dF
COMPARTMENT 1 COMPARTMENT 2 COMPARTMENT 3
OIOIOI
1

62-11491 14
FUNCTION CHANGE
1. Press the FUNCTION key.
2. Press the ENTER key to select the desired function to change.
3. Press either the UP or DOWN arrow key until the desired Function
setting is displayed.
NOTE
Function changes will change the operation of the unit.
4. Press the ENTER key to select.
NOTE
Functional Parameters may be locked depending on your
fleet requirements.
The Function Parameters control selected operating features of the unit.
When multiple choices are available, the display will show the function
description on the left side with the corresponding function choice on the
right side.
When a function parameter is displayed, the data choice can be changed by
pressing the ENTER key and then pressing either the UP or DOWN arrow
keys. The displayed choice will then flash to indicate that the choice has not
been entered. Depress the ENTER key to activate the new choice. The
display will stop flashing to indicate that the choice has been entered.
BOX TEMPERATURE
AUTO START/STOP
I
UNIT DATA
PRETRIP
ALARM/FAULT
STANDBYBUZZER OFF
MAN
DEFROST
CITY
SPEED
ROAD
FUNCTION ENTER
SETPOINT
O
i
DEFR 12.0 H
COMPARTMENT 1 COMPARTMENT 2 COMPARTMENT 3
OIOIOI
2, 4
13