Carrier SUPRA 950Mt Installation and operating instructions

Truck Refrigeration
OPERATION & SERVICE MANUAL
For The
Supra 950MT
with Cab Command Controller
Truck Refrigeration Units
62-11863 Rev C

OPERATION & SERVICE MANUAL
For The
Supra 950MT with Cab
Command Controller
© 2017 Carrier Corporation ● Printed in USA July 2017

i 62-11863
TABLE OF CONTENTS
PARAGRAPH NUMBER PAGE
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
1.1 SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
1.2 FIRST AID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
1.3 OPERATING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
1.4 MAINTENANCE PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
1.5 AUTO-START . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
1.6 ENGINE COOLANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
1.7 REFRIGERANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
1.8 BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
1.9 SPECIFIC WARNING, CAUTION, AND NOTICE STATEMENTS . . . . . . . . . . . . . . . . . . . . . 1–3
1.10 SAFETY DECALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6
UNIT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
2.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
2.2 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–8
2.2.1 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–8
2.2.2 Truck Condensing Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–8
2.2.3 Multi-Temperature Evaporators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–9
2.3 CONDENSING SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–9
2.3.1 Drive Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–9
2.3.2 Switches and Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–10
2.4 DESCRIPTION OF CAB COMMAND COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–10
2.4.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–10
2.4.2 Condensing Section Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–12
2.5 REMOTE EVAPORATOR SECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–15
2.5.1 Evaporator Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–15
2.5.2 Thermal Expansion Valve (TXV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–15
2.5.3 Defrost Termination Temperature Sensor (DTS) . . . . . . . . . . . . . . . . . . . . . . . . 2–15
2.5.4 Electric and Electric Hot/Gas Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–16
2.5.5 Receiver Pressure Valve (RPV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–16
2.5.6 Main Heat Valve (MHV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–16
2.5.7 Remote Evaporator Hot Gas Valve (1HGV and 2HGV) . . . . . . . . . . . . . . . . . . . 2–16
2.5.8 Liquid Solenoid Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–16
2.5.9 Electric Evaporator Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–16
2.6 SYSTEM OPERATING CONTROLS AND COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . 2–17
2.6.1 Switches And Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–17
2.7 UNIT SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–18
2.7.1 Engine Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–18
2.7.2 Water Temperature Sensor (WTS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–18
2.7.3 Lubrication System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–18
2.7.4 Compressor Reference Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–19
2.7.5 Refrigeration System Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–19
2.7.6 Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–19
2.7.7 Torque Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–20
2.8 SAFETY DEVICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–20
2.9 REFRIGERANT CIRCUIT DURING COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–21

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2.10 REFRIGERANT CIRCUIT DURING HEAT AND DEFROST . . . . . . . . . . . . . . . . . . . . . . . . . 2–21
2.10.1 Hot Gas Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–21
2.10.2 Principle of Induction Heating (Electric Heat) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–22
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
3.1 MICROPROCESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3–1
3.1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
3.2 MICROPROCESSOR CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
3.3 BEFORE STARTING THE UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
3.4 STARTING UNIT - ENGINE / ROAD OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3
3.5 STARTING UNIT - ELECTRIC / STANDBY OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4
3.6 START / STOP OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–5
3.7 CONTINUOUS RUN OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–6
3.8 CHANGING SET POINT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–7
3.9 MANUAL DEFROST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–8
3.10 FUNCTION CHANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–9
3.11 UNIT DATA / COMPARTMENT MENUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–11
3.11.1 Compartment Status Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–12
3.11.2 Compartment Selection Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–12
3.11.3 Unit Operating Data Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–12
3.12 ALARM DISPLAY AND RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–15
3.13 STOPPING UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–18
3.14 REMOTE PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–18
3.15 MODES OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–22
3.15.1 Heat/Cool Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–22
3.15.2 Defrost Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–22
3.15.3 Continuous or Start-Stop Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–22
3.16 PRE TRIP INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–24
3.16.1 Before Starting Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–24
3.16.2 After Starting Refrigeration Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–25
3.17 MICROPROCESSOR OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–25
CONTROL LOGIC AND TEMPERATURE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.1 MODES OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.1.2 Temperature Control Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.1.3 Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4–2
4.1.4 Relay Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.1.5 Lead Compartment Decision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3
4.1.6 Pulse Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5.1 MAINTENANCE SCHEDULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5.1.1 Oil Change Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1

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5.2 SERVICING ENGINE-RELATED COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3
5.2.1 Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3
5.2.2 Changing Lube Oil and Lube Oil Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4
5.2.3 Replacing Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–5
5.2.4 Engine Air Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–5
5.2.5 Servicing Fuel Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–6
5.2.6 Servicing Glow Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–6
5.2.7 Testing Flash Relay Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–6
5.2.8 Clutch Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–7
5.2.9 Servicing Alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–7
5.3 SERVICING AND ADJUSTING V-BELTS WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–8
5.3.1 Belt Tension Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–8
5.3.2 Trapezoidal V-belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–8
5.3.3 Alternator Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–8
5.3.4 Water Pump V-Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–9
5.3.5 Standby Motor - Compressor V-belt Diesel Engine - Compressor V-belt . . . . . . . 5–9
5.4 PUMPING DOWN THE UNIT OR REMOVING REFRIGERANT CHARGE . . . . . . . . . . . . . . 5–9
5.4.1 Pumping Down the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–10
5.4.2 Removing the Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–10
5.5 LEAK CHECKING THE UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–10
5.6 EVACUATION AND DEHYDRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–10
5.6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–10
5.6.2 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–10
5.6.3 Procedure for Evacuating and Dehydrating System . . . . . . . . . . . . . . . . . . . . . . 5–11
5.7 CHARGING THE REFRIGERANT SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–12
5.7.1 Installing a Complete Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–12
5.7.2 Checking the Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–12
5.8 REPLACING THE COMPRESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–13
5.9 COMPRESSOR OIL LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–14
5.9.1 Checking Oil Level in 05G Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–14
5.9.2 Adding Oil with Compressor in System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–14
5.9.3 Adding Oil to Service Replacement Compressor . . . . . . . . . . . . . . . . . . . . . . . . 5–14
5.9.4 Removing Oil from the Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–15
5.10 COMPRESSOR UNLOADER VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–15
5.10.1 Checkout Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–15
5.10.2 Solenoid Coil Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–15
5.10.3 Replacing Solenoid Valve Internal Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–15
5.11 CHECKING AND REPLACING FILTER DRIER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–16
5.12 CHECKING AND REPLACING HIGH PRESSURE CUTOUT SWITCHES (HP1 OR HP2) . 5–16
5.12.1 Removing High Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–16
5.12.2 Checking High Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–16
5.13 REPLACING RECEIVER SIGHT GLASS ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–17
5.14 COIL CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–18
5.14.1 Evaporator Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–18
5.14.2 Condenser Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–18
5.15 ADJUSTING THE COMPRESSOR PRESSURE REGULATING VALVE (CPR) . . . . . . . . . . 5–18
5.16 THERMOSTATIC EXPANSION VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–19
5.16.1 Setting and Adjusting Superheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–19
5.16.2 Replacing Expansion Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–20

62-11863 iv
5.17 SUCTION PRESSURE TRANSDUCER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–21
5.18 MICROPROCESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–23
5.18.1 Microprocessor Replacement and Configuration Service Guidelines . . . . . . . . . 5–24
5.18.2 Controller Sensor Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–24
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
6.1 DIESEL ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
6.1.1 Engine Will Not Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
6.1.2 Engine Starts Then Stops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
6.1.3 Starter Motor Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
6.1.4 Malfunction In the Engine Starting Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
6.2 ALTERNATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
6.3 REFRIGERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
6.3.1 Unit Will Not Cool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
6.3.2 Unit Runs But Has Insufficient Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
6.3.3 Unit Operates Long or Continuously in Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
6.3.4 Unit Will Not Heat or Has Insufficient Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
6.3.5 Defrost Cycle Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4
6.3.6 Abnormal Pressure, Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4
6.3.7 Abnormal Pressure, Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5
6.3.8 Abnormal Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5
6.3.9 Control System Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5
6.3.10 No Evaporator Air Flow or Restricted Air Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5
6.3.11 Expansion Valve Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–6
6.3.12 Hot Gas Valve Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–6
6.4 STANDBY MOTOR MALFUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–6
ELECTRICAL SCHEMATIC WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–1
7.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–1
7.2 WIRING SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7–1
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INDEX–1

v 62-11863
LIST OF ILLUSTRATIONS
FIGURE NUMBER Page
Figure 2.1 Supra 950MT Model - Top View/Cab Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
Figure 2.2 Supra 950MT Model - Curbside View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
Figure 2.3 Supra 950MT Model - Roadside View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
Figure 2.4 Evaporator (MTS 1100 Illustrated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
Figure 2.5 Electrical Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
Figure 2.6 Control Relay Board View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–6
Figure 2.7 Multi-Temp Sub Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–6
Figure 2.8 Supra 950MT Serial Number Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–9
Figure 2.9 70 Amp Alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–12
Figure 2.10 Cylinder Head - Unloaded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–13
Figure 2.11 Cylinder Head - Loaded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–14
Figure 2.12 Accumulator/Subcooler/Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–15
Figure 2.13 Refrigeration Circuit - Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–23
Figure 2.14 Refrigeration Circuit - Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–24
Figure 3.1 Cab Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
Figure 4.1 Temperature Controller Op Seq (Frozen Range) Controller Set Point Below +10°F (-12°C) . . . . 4–3
Figure 4.2 Perishable Continuous Mode - Normal (Non-Lead) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–4
Figure 4.3 Perishable Continuous Mode - Normal (Lead) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–4
Figure 4.4 Frozen Continuous Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–5
Figure 5.1 Cooling Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3
Figure 5.2 Fuel Filter and Fuel Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–5
Figure 5.3 Electric Fuel Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–6
Figure 5.4 Belt Tension Gauge (Part Number 07-00203-00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–8
Figure 5.5 V-belt Arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–8
Figure 5.6 Water Pump Belt - Idler Retaining Nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–9
Figure 5.7 Dual Vacuum Pump Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–12
Figure 5.8 Compressor (05G) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–13
Figure 5.9 Unloader Solenoid Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–16
Figure 5.10 Typical Setup for Testing High Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–17
Figure 5.11 Compressor Pressure Regulating Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–18
Figure 5.12 Thermostatic Expansion Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–19
Figure 5.13 Thermostatic Expansion Valve Bulb and Thermocouple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–19

62-11863 vi
LIST OF TABLES
TABLE NUMBER Page
Table 2–1 Additional Support Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
Table 2–2 Model Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
Table 2–3 Evaporator Model Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
Table 2–4 Fuse Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–7
Table 2–5 Relay Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–7
Table 2–6 Test Point Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–8
Table 2–7 Lube Oil Viscosity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–18
Table 2–8 Safety Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–20
Table 3–1 Function Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–10
Table 3–2 Display for Compartment 1 Turned On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–12
Table 3–3 Display for Compartment 2 Turned On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–12
Table 3–4 Display for All Compartments On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–12
Table 3–5 Display for All Compartments Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–12
Table 3–6 Unit Data Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–13
Table 3–7 Alarm Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–15
Table 3–8 Engine Coolant Temperature Glow Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–23
Table 3–9 Battery Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–24
Table 4–1 Relay Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
Table 5–1 Service Category Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2
Table 5–2 Belt Tension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–8
Table 5–3 Optimum Operating Superheat Temperature Refrigerant Pressure and Type . . . . . . . . . . . . . . . 5–20
Table 5–4 Sensor Resistance (ATS, CDT, RAS, SAS & WTS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–21
Table 5–5 R404A Temperature-Pressure Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–22
Table 5–6 Connection Point Voltage Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–23
Table 5–7 Microprocessor Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–25

1-1 62-11863
SECTION 1
SAFETY PRECAUTIONS
1.1 SAFETY PRECAUTIONS
The following general safety notices supplement the specific warnings and cautions appearing elsewhere in this
manual. They are recommended precautions that must be understood and applied during operation and mainte-
nance of the equipment covered herein. The general safety notices are presented in the following three sections
labeled First Aid, Operating Precautions and Maintenance Precautions. A listing of the specific warnings and cau-
tions appearing elsewhere in the manual follows the general safety notices.
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 inspec-
tions, and problem troubleshooting, you may be exposed to moving parts. Stay clear of all moving parts when the
unit is in operation and when the unit RUN/STOP Switch (RSS) is in the START/RUN position.
CAUTION
!
Under no circumstances should anyone attempt to repair the Logic or Display Boards! Should
a problem develop with these components, contact your nearest Carrier Transicold dealer for
replacement.
CAUTION
!
Under no circumstances should a technician electrically probe the processor at any point,
other than the connector terminals where the harness attaches. Microprocessor components
operate at different voltage levels and at extremely low current levels. Improper use of voltme-
ters, jumper wires, continuity testers, etc. could permanently damage the processor.
CAUTION
!
Most electronic components are susceptible to damage caused by electrical static discharge
(ESD). In certain cases, the human body can have enough static electricity to cause resultant
damage to the components by touch. This is especially true of the integrated circuits found on
the truck/trailer microprocessor.
1.2 FIRST AID
An injury, no matter how slight, should never go unattended. Always obtain first aid or medical attention immedi-
ately.
1.3 OPERATING PRECAUTIONS
• Always wear safety glasses
• Wear hearing protection as required
• Keep hands, clothing and tools clear of all moving parts
• No work should be performed on the unit until all circuit breakers and the RUN/STOP Switch are turned off,
and the power supply is disconnected
• Always work in pairs; never work on the equipment alone
• In case of severe vibration or unusual noise, stop the unit and investigate

62-11863 1-2
1.4 MAINTENANCE PRECAUTIONS
Beware of unannounced starting of the unit. This unit is equipped with Auto-Start in both the road and standby
modes. The unit may start at any time. When performing any check of the system make certain the RUN/STOP
Switch is in the OFF position.
Be sure power is turned off before working on motors, controllers, solenoid valves, and electrical control switches.
Tag circuit breaker and vehicle ignition to prevent accidental energizing of circuit.
Do not bypass any electrical safety devices, e.g. bridging an overload, or using any sort of jumper wires. Problems
with the system should be diagnosed and any necessary repairs performed by qualified service personnel.
When performing any arc welding on the unit or container, disconnect all wire harness connectors from the micro-
processor. Do not remove wire harnesses from the modules unless you are grounded to the unit frame with a static
safe wrist strap.
In case of electrical fire, place RUN/STOP switch in the OFF position and extinguish with CO2 (never use water).
1.5 AUTO-START
Your refrigeration unit is equipped with Auto-Start in both Start/Stop and Continuous Run modes. The unit may start
at any time. A buzzer will sound for five seconds before the unit is started. When performing any check of the refrig-
eration unit (e.g., checking the belts, checking the oil), make certain that the RUN/STOP Switch is in the OFF (0)
position.
1.6 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 pres-
sure without spray.
1.7 REFRIGERANTS
The refrigerant contained in this 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 ser-
vice, we recommend that you contact your nearest Carrier Transicold authorized repair facility whenever your unit
requires refrigeration system service.
1.8 BATTERY
This unit is equipped with a lead-acid type battery. The battery normally vents small amounts of flammable hydro-
gen gas. Do not smoke when checking the battery. A battery explosion can cause serious physical harm and/or
blindness.

1-3 62-11863
1.9 SPECIFIC WARNING, CAUTION, AND NOTICE STATEMENTS
To help identify the label hazards on the unit and explain the level of awareness each one carries, an explanation is
given with the appropriate consequences:
DANGER
!
DANGER - warns against an immediate hazard which WILL result in severe personal injury or death.
WARNING
!
WARNING - warns against hazards or unsafe conditions which COULD result in severe personal
injury or death.
CAUTION
!
CAUTION - warns against potential hazard or unsafe practices which could result in minor personal
injury.
NOTICE
NOTICE - warns against potential product or property damage.
The statements listed below are specifically applicable to this refrigeration unit and appear elsewhere in this man-
ual. These recommended precautions must be understood and applied during operation and maintenance of the
equipment covered herein.
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 inspection/servicing by prop-
erly trained personnel only
WARNING
!
Refrigerant is an acid base liquid and harmful for human contact. Wear gloves and eye protec-
tion when working with refrigerant. Allow time for coolant to cool and for pressure to release
before the cap is removed from the radiator.
WARNING
!
Protect your eyes carefully from solvent by wearing chemical-safe goggles.
WARNING
!
Beware of unannounced starting of the engine, standby motor, evaporator fans or condenser
fan. The unit may cycle the engine, standby motor or fans unexpectedly as control require-
ments dictate
WARNING
!
Beware of unannounced starting of the fans and V-belts caused by the thermostat and the
start/stop cycling of the unit that may start automatically.

62-11863 1-4
WARNING
!
Under no circumstances should ether or any other starting aids be used to start engine.
WARNING
!
Always place the RUN/STOP switch in the STOP position and turn off the power supply before
disconnecting the power plug from the unit.
WARNING
!
Make sure the power plug is clean and dry before connecting to any power source. Do not
attempt to connect or remove power plug or perform service and/or maintenance before ensur-
ing the unit RUN/STOP Switch is in the STOP position, the I/O switch is in the “O” position and
the external power circuit breaker is OFF.
WARNING
!
Inspect battery cables for signs of wear, abrasion or damage at every pre trip inspection and
replace if necessary. Also check battery cable routing to ensure clamps are secure and cables
are not pinched or chafing against any components.
WARNING
!
Beware of V-belts and belt-driven components as the unit may start automatically. Before ser-
vicing unit, make sure the Run/Stop switch is in the STOP position. Also disconnect the nega-
tive battery cable.
WARNING
!
Do not use high pressure water spray to avoid damaging condenser fins.
WARNING
!
Do not allow insulated jumper wire to touch any ground.
WARNING
!
Do not use a nitrogen cylinder without a pressure regulator. Cylinder pressure is approxi-
mately 2350 psig (159.9 bar). Do not use oxygen in or near a refrigerant system as an explosion
may occur.
CAUTION
!
Observe proper polarity when installing battery. The negative battery terminal must be
grounded. Reverse polarity will destroy the rectifier diodes in alternator. As a precautionary
measure, disconnect positive battery terminal when charging battery in unit. Connecting char-
ger in reverse will destroy the rectifier diodes in alternator.

1-5 62-11863
CAUTION
!
In units with R404A and POE oil, the use of inert gas brazing procedures is mandatory, other-
wise compressor failure will occur. See Technical Procedure 98-50553-00 Inert Gas Brazing for
more information.
CAUTION
!
Use only ethylene glycol antifreeze (with inhibitors) in system as glycol by itself will damage
the cooling system. Always add pre-mixed 50/50 antifreeze and water to radiator/engine. Never
exceed more than a 50 percent concentration of antifreeze. Use a low silicate antifreeze.
CAUTION
!
When changing oil filters, the new filters should be primed with clean oil. If the filters are not
primed, the engine may operate for a period with no oil supplied to the bearings.
CAUTION
!
When changing fuel filter, the new filter should be filled with clean fuel.
CAUTION
!
Extreme care must be taken to ensure the manifold common connection remains immersed in
oil at all times. Otherwise air and moisture will be drawn into the compressor.
CAUTION
!
Check for correct power connection with connectors located in Main Control Relay Box.
CAUTION
!
Be certain that the unit is connected to an appropriate power source.
CAUTION
!
Do not allow the insulated jumper wire used to change unit Configurations to touch any
ground.
NOTICE
NEVER POUR COLD WATER INTO A HOT ENGINE. However, hot water can always be added to
a cold engine.

62-11863 1-6
1.10 SAFETY DECALS

1-7 62-11863

2-1 62-11863
SECTION 2
UNIT DESCRIPTION
2.1 INTRODUCTION
WARNING
!
Beware of unannounced starting of the engine, standby motor, evaporator fan or condenser
fan. The unit may cycle the engine, standby motor or fans unexpectedly as control require-
ments dictate.
Table 2–1 Additional Support Manuals
Manual Number Equipment Covered Type of Manual
-- -- -- Supra 950MT Parts included in T-T PLUS Rev. D
62-11861 Supra 950MT Operator’s Manual
62-10299 Compressor (05G) Parts List
62-11167 Engine Workshop Manual
Table 2–2 Model Chart
Model Number R404A Engine Compressor Standby Motor
TDD-36FN4-3M 12.0 LB / 5.44 KG D1105
Tri-Vortex
37 CFM O5G Rotation speed: 1760 rpm
@ 60 hz
Table 2–3 Evaporator Model Chart
Model Discharge Length Power (Watts) Number of fans
MTS 1100 H24 Single 43.3 inches (1100 mm) 2400 2
MTD 1100 H24 Double 43.3 inches (1100 mm) 2400 2

62-11863 2-2
Figure 2.1 Supra 950MT Model - Top View/Cab Command
1. Dip Stick
2. Muffler
3. Engine (Refer to Section 2.7.1)
4. Compressor (Refer to Section 2.7.4)
5. Alternator (12 V)
6. Electric standby motor
7. Fittings for MT evaporators
8. Compressor pressure regulating valve (CPR)
9. Filter drier
10. Condenser
11. Coolant bottle
12. Cab Command
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