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Carrier TRANSICOLD X4 7300 Operation And Service Manual

Trailer and rail refrigeration units
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Operation and Service Manual
X4 7300 and 7500
TM
Starting with Serial Number UAJ91657524
Trailer and Rail Refrigeration Units
62-12169 Rev C

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Summary of Contents for Carrier TRANSICOLD X4 7300

  • Page 1 Operation and Service Manual X4 7300 and 7500 Starting with Serial Number UAJ91657524 Trailer and Rail Refrigeration Units 62-12169 Rev C...
  • Page 3 Operation and Service Manual X4 7300 and 7500 Starting with Serial Number UAJ91657524 Trailer and Rail Refrigeration Units © Carrier Corporation, 2021 Printed in U. S. A October 2021...
  • Page 4 Manual Revision History 62-12169 Rev. Date Reason for Release 12/2/2020 Updated software, new manual 12/18/2020 Updated cover and face page; corrected formatting issues and verbiage per BM input 3/3/2021 Updated Sections 1, 2, and 8 to add references and instructions for R- 452A refrigerant;...

  • Page 5: Table Of Contents

    Safety Precautions ..................1–1 SAFETY PRECAUTIONS .
  • Page 6 2.13 REFRIGERATION CIRCUIT - COOLING ........2–20 2.14 REFRIGERANT CIRCUIT - HEAT AND DEFROST .
  • Page 7 TEMPERATURE CONTROL ..........4–6 4.5.1 Temperature Determination...
  • Page 8 MICROPROCESSOR/STEPPER MODULE (MSM) REPLACEMENT ....5–16 5.5.1 Pre-Replacement Steps ......... . . 5–17 5.5.2 Microprocessor/Stepper Module (MSM) Replacement .
  • Page 9 REFRIGERANT SYSTEM SERVICE ......... . . 8–28 8.7.1 Refrigerant System Service Connections .
  • Page 10 REFRIGERATION / TEMPERATURE CONTROL ........9–4 9.3.1 Unit Will Not Cool .

  • Page 11: Safety Precautions

    Follow safe work practices and utilize the appropriate protective equipment at all times. 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.

  • Page 12: Specific Warning, Caution, And Notice Statements

    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.
  • Page 13 WARNING Never use air or gases containing oxygen for leak testing or operating refrigerant compressors. Pressurized mixtures of air or gases containing oxygen can lead to explosion. WARNING Inspect battery cables for signs of wear, abrasion or damage at every pre-trip inspection and replace if necessary.
  • Page 14 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. Under no circumstances should anyone attempt to repair sealed module internal components.
  • Page 15 Unit uses R-404A or R-452A refrigerant and POE oil. The use of inert gas brazing procedures is mandatory for all Carrier Transicold refrigeration units; otherwise compressor failure will occur. For more information Refer to Technical Procedure 98-50553-00 Inert Gas Brazing.
  • Page 16 An overcharge of compressor oil will reduce system capacity and possibly cause internal compressor damage. Use only Carrier Transicold approved Polyol Ester Oil (POE). Buy quantities of one gallon or less. When using this hygroscopic oil, immediately reseal. Do not leave container of oil open or contamination will occur.

  • Page 17: Specific R-452A Refrigerant Warning And Cautions

    Specific R-452A Refrigerant Warning and Cautions WARNING R-452A is an A1 non-flammable refrigerant blend; however certain of its constituents are considered A2L mildly flammable. Follow the R-452A refrigerant reclaim / recovery procedure before performing any “hot work,” including but not limited to brazing or welding on a unit that has been charged with R-452A, to prevent flare up of residual A2L refrigerant constituents.

  • Page 18: Safety Decals

    Safety Decals 62-12169 1–8...
  • Page 19 1–9 62-12169...
  • Page 20 62-12169 1–10...
  • Page 21 1–11 62-12169...
  • Page 22 62-12169 1–12...

  • Page 23: Unit Description

    The APX Control System includes a manual switch, control modules, fuses, and associated wiring. The unit may be equipped with an optional remote light bar which mounts separately on the front outside corner of the compart- ment. Temperature control is provided by the Carrier Transicold APX Control System (Refer to 2.6). Once the Section system is set at the desired temperature, the unit will operate automatically to maintain the desired temperature within very close limits.

  • Page 24: Refrigerant Charge

    The APX Control System (Figure 2.2 Figure 2.7). Table 2–1 Model Chart Refrigerant Compressor Engine Refrigerant Charge Model Engine Speed Type X4 7300 R-404A NDWB36 X4 7300 R-452A NDWB76 05G 41cfm V2203L-DI-EF01e High 1800 X4 7500 (Base Part Number Low 1350 R-404A 16.5...
  • Page 25 Figure 2.1 Front View - Refrigeration System Components 1. Condenser Coil and Sub-Cooler 13. Compressor Suction Temperature Sensor (CST) 2. Ambient Air Temperature Sensor (AAT) 14. Discharge Service Valve and Strainer 3. Condenser Fan 15. High Pressure Switch (HPS - Located in the tee) 4.
  • Page 26 Figure 2.2 Front View - Engine, Control System and AutoFresh Components 1. Coolant Bottle 19. Rack Position Sensor (RPS) 20. Engine Oil Drain 2. Clutch (CLH) 21. Starter (SS,SSC,SM) 3. Fuel Filter/Heater (FH) or Fuel Head Assembly 22. Engine Preheater (EPH) 4.
  • Page 27 Figure 2.3 Evaporator Section - Grille Removed MOUNT DTT AS SHOWN TUBE SHEET 1. Evaporator Air Nozzle 9. Low Pressure Air Switch Fitting (location) 10. Compressor Suction Modulation Valve (CSMV) 2. Evaporator Fan 11. Defrost Termination Temperature Sensor (DTT) 3. Supply Air Temperature Sensor (SAT) 12.

  • Page 28: Condensing Section

    Section 8.5.10.) The system may be fitted with an intake air temperature sensor (IAT) and a manifold absolute pressure transducer (MAP). These sensors are installed when Carrier Transicold factory monitoring of the air system is required. 2.4.3 Engine Controls 2.4.3.1 Fuel/Speed Actuator (FSA) The FSA combines the fuel shutoff solenoid and speed control solenoid into one component.

  • Page 29: Alternator

    2.4.4 Alternator Electrical power for the APX Control System and for battery charging is provided by the 12 VDC alternator. 2.4.4.1 Alternator Operation CAUTION Observe proper polarity when installing battery. Negative battery terminal must be grounded. Reverse polarity will destroy the rectifier diodes in alternator. As a precautionary measure, dis- connect the negative and then the positive battery terminal when charging battery in unit.
  • Page 30 2.4.7.1 Major Working Parts • Solenoid and valve system • Spring loaded piston type bypass valve • Spring loaded discharge check valve (located on the valve plate) Figure 2.5 Compressor Cylinder Head Unloaded Valve Stem Solenoid Valve Gas Bypass Port Spring Guide Bypass Valve Spring...

  • Page 31: 2.4.8 Compressor Switches, Transducers And Sensors

    Figure 2.6 Compressor Cylinder Head Loaded Valve Stem Solenoid Gas Bypass Port Valve Spring Guide Bypass Valve Spring Piston Bleed Orifice Strainer Cylinder Discharge Valve Discharge Manifold Suction Manifold Discharge Check Valve Assembly Valve Plate Cylinder Suction Valve 2.4.7.3 Loaded Operation With the solenoid valve (Figure 2.6) de-energized the solenoid valve stem will close the gas bypass port.

  • Page 32: Condenser Coil

    2.4.8.5 Compressor Suction Temperature Sensor (CST) The CST is a thermistor type sensor that provides a signal to the APX Control System equivalent to the tempera- ture of the gas leaving the heat exchanger and entering the compressor. The reading is displayed, recorded in the DataLink data recorder and used to control the refrigeration system. The CST is located on the heat exchanger outlet to suction vibrasorber line.

  • Page 33: Evaporator Coil

    2.5.1 *Evaporator Coil The evaporator is a tube in fin type. The operation of the compressor maintains a reduced pressure within the coil. At this reduced pressure, the liquid refrigerant evaporates at a temperature sufficiently low enough to absorb heat from the air.

  • Page 34: System Operating Controls And Components

    System Operating Controls and Components Temperature control is provided by the Carrier Transicold APX™ Control System. Once the system is set at the desired temperature, the unit will operate automatically to maintain the desired temperature within very close limits. 2.6.1 Multiple Languages Messages in the MessageCenter can be displayed in English or Spanish.
  • Page 35 Figure 2.7 Power Module (PM) 1. K2 Diesel Engine Relay (DER) 10. Fuse (F7 = 20 amp) - Fuel Heat, AFAX (Option) 2. K1 Power Enable Relay (PER) 11. Fuse (F6 = 5 amp) - Logic 3. Buzzer Connection (BC) 12.
  • Page 36 2.6.4.2 Microprocessor Stepper Module (MSM) The Microprocessor Stepper Module (MSM) houses the main system microprocessor and the operating processor for the CSMV and EVXV stepper valves. It is totally self-contained and does not contain any serviceable components. 2.6.4.3 Microprocessor Status LED Microprocessor activity within the Microprocessor Stepper Module (MSM) or Power Module (PM) can be deter- mined by observing the status LED, located just to the right of the module bar code on the MSM or inside the PM.
  • Page 37 Figure 2.8 Display Module START/STOP DIESEL COOL .3 34 BOX TEMPERATURE SETPOINT STATUS OK 1. Display Screen 7. Arrow Keys 2. MENU key 8.“=” (Select) Key 3.DEFROST key 9. START/RUN-OFF Switch 4. START/STOP - CONTINUOUS Key 10. Soft Keys 5. Alarm LED 11.

  • Page 38: Options

    2.6.4.6 Display Module Keys - See Figure 2.8. • ALARM - The ALARM key allows viewing of the alarms stored in the system. • UP ARROW and DOWN ARROW - These keys allow scrolling through the selections presented. • EQUAL (ENTER) - The EQUAL key is used to confirm a selection and lock it into memory. •...

  • Page 39: Fuel Level Sensor

    The system may be configured to display the sensor reading in the Unit Data and to record the sensor reading in the DataLink data recorder. A user specified name may be configured for each sensor. This name will be displayed, rather than the default Remote Sensor #1 or Remote Sensor #2, name in the unit data list.

  • Page 40: Engine Data

    Engine Data Unit Specification Engine Model V2203L-DI-EF01e (Base Part Number 26-00132) Rated Power 24.4 hp (18.2 KW) @1800 rpm Displacement 135 in (2.216 liters) No. Cylinders NOTE: Refer to Table 2–1 for engine speed settings Coolant Capacity 2.4 U.S. gallons (9 liters) - 50/50 mix - never to exceed 60/40. Recommended to use Extended Life Coolant, Nitrite Free (ELC-NF), which is red in color and labeled for at least five years, 12,000 hours service life.

  • Page 41: 2.10 Refrigeration System Data

    2.10 Refrigeration System Data Unit Specification Defrost Air Switch (DAS) Initiates Defrost: 1.40 ±07 inch (35 ± 1.8 mm) WG Defrost Timer 1.5h, 3h, 6h, or 12 hours Fusible Plug Melting Point 430°F (221°C) High Pressure Switch (HPS) Opens, on pressure rise, at: 465 ± 10 psig (32 ± 0.7 bar)  Closes, on pressure fall, at: 350 ±...

  • Page 42: 2.13 Refrigeration Circuit - Cooling

    2.13 Refrigeration Circuit - Cooling When cooling, (See 2.10) the unit operates as a vapor compression refrigeration system. The main compo- Figure nents of the system are: • Reciprocating compressor • Air-cooled condenser • Evaporator expansion valve • Direct expansion evaporator 1.
  • Page 43 Figure 2.10 Refrigeration Circuit - Cooling Condensor Fusible Plug SV1, N/O Saturated Mixture Bypass Check Reciever Valve Subcooler Liquid Line Service Valve Heat Exchanger EVXV EVOT EVOP CSMV Evaporator Filter Drier SV4, Drain Pan Distributor Vibrasorber Vibrasorber High Pressure Vapor Discharge High Pressure Liquid Check...

  • Page 44: 2.14 Refrigerant Circuit - Heat And Defrost

    2.14 Refrigerant Circuit - Heat and Defrost When the system calls for heating (see Figure 2.11): • The normally closed hot gas solenoid valve (SV4) is energized (opened) • The normally open condenser pressure control solenoid valve (SV1) is energized (closed) •...
  • Page 45 Figure 2.11 Refrigeration Circuit - Heat and Defrost Condensor Fusible Plug SV1, N/O Bypass Check Reciever Valve Subcooler Liquid Line Service Valve Heat Exchanger EVXV EVOT EVOP CSMV Evaporator Filter Drier SV4, Drain Pan Distributor Vibrasorber Vibrasorber High Pressure Vapor Discharge High Pressure Liquid Check...
  • Page 46 62-12169 2–24...

  • Page 47: Operation

    SECTION 3 Operation Display 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 properly trained personnel only. Figure 3.1 Display Module START/STOP DIESEL COOL .3 34...

  • Page 48: Display Screens

    Display Screens START/STOP DIESEL COOL .3 34 BOX TEMPERATURE SETPOINT STATUS OK Default Screen START/STOP DIESEL COOL Viewing Menu Soft Key Selections Press Menu Key to Scroll INTELLISET PRETRIP HOUR UNIT METER DATA Typical Menu Screen SAMPLE SCREEN (1 OF 3) DISPLAYED ITEM #1 DISPLAYED ITEM #2 DISPLAYED ITEM #3...

  • Page 49: Starting

    1. Place the START/RUN-OFF switch in the START/RUN position. 2. The system will display the Carrier Transicold logo, display the default screen, present language selection and the hour meter readings (if configured to do so) along with a test flash of the alarm light and light bar amber LED’s.

  • Page 50: Inspect Mode

    Inspect Mode • Inspect mode provides an additional layer of safety for operators and technicians. Inspect mode should be used during all pre-trip inspections of the unit. • Inspect mode is a user activated feature that forces the unit to shutdown and remain in shutdown regard- less of operating state.

  • Page 51: Intelliset

    NOTES • The above settings are examples of possible settings. Factory IntelliSets are available from your authorized Carrier Transicold Truck/Trailer dealer. • An IntelliSet may be pre-programmed as “IntelliSleep” which allows Sleep mode to be entered by simply changing to that IntelliSet.
  • Page 52 5. Press the EXIT soft key to return to the default display. INTELLISETS (2 OF 7) INTELLISET OFF BANANA ACTIVE FLOWERS LETTUCE CHEESE BACK EXIT NOTES • If setpoint change is allowed, refer to for setpoint change instruction. Section 3.7 •...

  • Page 53: Pre-Trip

    Pre-Trip Pre-Trip is a set of tests run by the APX Control System to check unit operation. It is recommended that a Pre-Trip is run prior to loading the refrigerated compartment. It will indicate a failure if one is detected. A Pre-Trip can be started at any box temperature.
  • Page 54 4. If “Start Pre-Trip” is selected, Pre-Trip will begin and the Pre-Trip Status screen will be displayed. Immediately following Pre-Trip OR if “View Results of Last Pre-Trip” is selected the Pre-Trip Summary Screen will be dis- played. NOTE At any time during Pre-Trip, the UNIT DATA soft key may be pressed to allow the user to view the Unit Data screen (refer to 3.14).
  • Page 55 Test 2 - 12VDC Electrical Component Amperage Check: Test 2 will check the amperage (current) draw of the following components: • Battery Amp Draw (All Components Turned Off). • SV1 • AutoFresh Air Exchange Relay (AFAR) if equipped • SV4 •...
  • Page 56 Test 14 - Low Side Pump Down: With the unit running in two-cylinder, low speed, SV4 will be closed and the EVXV will be restricted to pump down the unit. If the system cannot obtain the required suction pressure, alarm will be displayed.

  • Page 57: Changing Setpoint

    Changing Setpoint START/STOP DIESEL COOL .3 34 BOX TEMPERATURE SETPOINT STATUS OK 1. With the system powered up (START/RUN-OFF switch in the START/RUN position) or in PC mode and the default screen displayed (press the Back soft key if required). 2.

  • Page 58: Start-Stop Operation

    Start-Stop Operation START/STOP DIESEL COOL .3 34 BOX TEMPERATURE SETPOINT START/STOP MODE SELECTED 1. With the system powered up (START/RUN-OFF switch in the START/RUN position) or in PC mode press the START-STOP/CONTINUOUS key until “START/STOP” is highlighted. 2. The message “START/STOP MODE SELECTED” will be displayed in the MessageCenter for 10 seconds. 3.

  • Page 59: Continuous Operation

    Continuous Operation CONTINUOUS DIESEL COOL .3 34 BOX TEMPERATURE SETPOINT CONTINUOUS RUN MODE SELECTED 1. With the system powered up (START/RUN-OFF switch in the START/RUN position) or in PC mode press the START-STOP/CONTINUOUS key until “CONTINUOUS” is displayed and highlighted. 2.

  • Page 60: 3.10 Data Recorder

    3.10 Data Recorder The APX Control System contains a built-in DataLink data recorder with 3 megabytes of memory. The recorded data can be downloaded from the DataLink data recorder using a Data Transfer USB memory device. The DataLink data recorder reads the same input information as the APX Control System (Functional Parameters, Configurations, and Unit Data) at all times.

  • Page 61: Data Downloading

    3.10.3 Data Downloading The data within the DataLink data recorder can be downloaded using a Data Transfer USB memory device (refer to Section 5.3.1). 3.10.4 DataLink Data Recorder Power-Up The DataLink data recorder records data the entire time the START/RUN - OFF switch is in the START/RUN posi- tion.
  • Page 62 Mark Trip Start Trip Start places the present time and date as a stamp in the data recorder memory to allow easy review of the data from the last trip, and to allow downloading data from a specific trip. A trip begins at a Trip Start and ends at the next Trip Start.

  • Page 63: 3.11 Manual Defrost

    3.11 Manual Defrost START/STOP DIESEL DEFROST DEFROST SETPOINT DEFROST CYCLE STARTED 1. With the system powered up (START/RUN-OFF switch in the START/RUN position) press the MANUAL DEFROST key. NOTE This procedure may be demonstrated in PC mode but the unit will not actually enter defrost. 2.

  • Page 64: 3.12 Language Selection

    3.12 Language Selection START/STOP DIESEL COOL Viewing Menu Soft Key Selections Press Menu Key to Scroll LANGUAGE DATA EXIT RECORDER NOTE Language Selection may not be available on early software revisions. 1. With the system powered up (START/RUN-OFF switch in the START/RUN position) or in PC mode press the MENU key until LANGUAGE is displayed.

  • Page 65: 3.13 Advanced User

    3.13 Advanced User START/STOP DIESEL COOL .3 34 BOX TEMPERATURE SETPOINT STATUS OK NOTES: • As shipped from the factory, the system will operate in Driver mode. In Driver mode, some data and menu items covered in this publication will not be available. •...

  • Page 66: 3.14 Unit Data

    3.14 Unit Data START/STOP DIESEL COOL Viewing Menu Soft Key Selections Press Menu Key to Scroll INTELLISET PRETRIP HOUR UNIT METER DATA 1. With the system powered up (START/RUN-OFF switch in the START/RUN position) or in PC mode, press the MENU key until the UNIT DATA soft key is displayed. 2.

  • Page 67: System Information

    Table 3–1 Unit Data Data Definition Engine This is only displayed when the optional sensor is installed and config- FUEL LEVEL ured YES. Displays % of fuel in tank. BATTERY Battery voltage AMP DRAW Battery charging or discharging amps ENGINE COOLANT TEMP Engine coolant temperature ENGINE SPEED Engine revolutions per minute...

  • Page 68: 3.15 View Active Alarms

    3.15 View Active Alarms ACTIVE ALARMS (2 OF 5) A00013 HIGH DISCHARGE PRESSURE A00022 LOW SUCTION PRESSURE A00028 CHECK REFRIG SYSTEM BACK CLEAR ALARMS 1. With the system powered up (START/RUN-OFF switch in the START/RUN position) or in PC mode press the ALARM key.

  • Page 69: 3.16 View Hour Meters

    3.16 View Hour Meters START/STOP DIESEL COOL Viewing Menu Soft Key Selections Press Menu Key to Scroll INTELLISET PRETRIP HOUR UNIT METER DATA 1. With the system powered up (START/RUN-OFF switch in the START/RUN position) or in PC mode, press the MENU key until the HOUR METER soft key is displayed.

  • Page 70: 3.17 Functional Parameters

    3.17 Functional Parameters START/STOP DIESEL COOL Viewing Menu Soft Key Selections Press Menu Key to Scroll LANGUAGE DATA FUNCTIONS EXIT RECORDER 1. With the system powered up (START/RUN-OFF switch in the START/RUN position) or in PC mode, and in Advanced User mode, press the MENU key until the FUNCTIONS soft key is displayed. 2.
  • Page 71 Table 3–2 Functional Parameters Function Parameter Description Selections AIR FLOW NORMAL = allows the engine to cycle from High Speed to NORMAL Low Speed, based on compartment temperature. HIGH HIGH = Some products generate a considerable amount of heat (due to respiration) during transportation. This frequently occurs with produce.
  • Page 72 Table 3–2 Functional Parameters Function Parameter Description Selections AUTOFRESH AIR CLOSED = AutoFresh Air Exchange assembly will be closed. CLOSED OPEN = Assembly will be open if the engine is running and OPEN the setpoint is greater than 28.0°F (-2.22°C). CFM CONTROL = Assembly will be cycled open and closed CFM CONTROL over a 20-minute time period.

  • Page 73: Sleep Mode

    Table 3–2 Functional Parameters Function Parameter Description Selections SLEEP MODE For complete instructions on entering and setting parameters for Sleep mode refer to Section 3.18. Overrides If the switches are all configured “Switch Not Installed”, this parameter will not display. NO = The system will respond to the switch as configured.
  • Page 74 3.18 Sleep Mode START/STOP DIESEL COOL Viewing Menu Soft Key Selections Press Menu Key to Scroll LANGUAGE DATA FUNCTIONS EXIT RECORDER 1. To place the unit in Sleep mode, enter the Advanced User Functional parameter screen as described in Section 3.17.
  • Page 75 Additional Sub-Menus: 1. “WAKE UP TIME” may be set to ON or OFF, the default setting is OFF. a. When “WAKE UP TIME” is set to OFF the unit will remain in Sleep mode until it is taken out manually (refer to the preceding “TO EXIT SLEEP MODE”...

  • Page 76: 3.19 Stopping The Unit

    3.19 Stopping the Unit START/STOP DIESEL COOL .3 34 BOX TEMPERATURE SETPOINT STATUS OK SROS To stop the unit, place the START/RUN-OFF switch in the OFF position. The unit will shutdown immediately while the system completes a shutdown sequence and then the display will go blank. The engine will stop and the dis- play will turn off.

  • Page 77: Datatrak (Option)

    Carrier Transicold has worked with approved communication providers with recommended installation locations, and wiring connections to Carrier units. Instructions for installing this equipment is supplied by each individual pro- vider, and not by Carrier Transicold. Communications electrical harnesses are available from Carrier Transicold Performance Parts Group (PPG).

  • Page 78: 3.21 Emergency Bypass Mode

    Once Emergency Bypass mode has been activated, the unit will operate normally for 24 hours, a countdown timer will be shown on the display. This 24-hour window of operation will keep the load safe and provide enough time to contact the nearest Carrier Transicold Service Center for repair of the unit. START/STOP...

  • Page 79: 3.22 Remote Panel

    3.22 Remote Panel The unit may be fitted with an optional remote control panel. The remote panel, which is very similar to the display module, displays compartment setpoints, compartment temperatures and operating modes (heat, cool or defrost). The setpoint may be modified and the unit may be started and stopped using the remote panel. This compact remote panel can be mounted to suit the individual operator’s preferences - on the front bulkhead, or in the compartment (even in the wall itself).
  • Page 80 The following unit functions are controlled the same as the main display: • Display compartment temperatures - Section 3.2 • Display the current mode of operation for each compartment - Section 3.2 • Intelliset selection - Section 3.5 • Initiate Pre-Trip - Section 3.6 •...

  • Page 81: Engine And Temperature Control

    SECTION 4 Engine and Temperature Control NOTES 1. If the unit is in an alarm condition, the control system alarm response may override the following unit operation descriptions. If an alarm is displayed in the MessageCenter, refer to the specific alarm description for “Unit Control”...

  • Page 82: Engine Control

    NOTE The unit will not restart for at least 30 seconds following a shutdown. Engine Control Engine control consists of engine start-up and speed control. 4.3.1 Engine Start-Up Sequence On command to perform a Start-up the main microprocessor will supply power from PM-9 to the fuel pump (FP) and from PM-32to ENCU-44.

  • Page 83: Transition To High Speed

    contacts to supply power from fuse F7, through the fuel heater temperature switch (FHTS) to the heater . Refer to for FHTS settings. Section 2.8 4.3.2 Transition to High Speed After a successful start, the control system may call for the engine to transition to high speed. When high speed is required, the main microprocessor will provide a signal through the CAN system to the ENCU, calling for the speed change.

  • Page 84: Cooling

    4.4.2 Cooling In the Cool mode, the control system will operate the unit controls as follows (refer to Section 2.13): Engine Speed Open Closed See Note 1 Clutch CSMV EVXV Output Engage See Note 2 See Note 3 NOTES 1. The selected temperature control sensor determines if the unit is running high or low speed. 2.

  • Page 85: Ultrafreeze Temperature Control

    4.4.4.1 Cool Pulsed Mode Engine Speed Open Closed Clutch CSMV/ UL1 and UL2 Output EVXV Engage Unload See Note NOTE For CSMV/EVXV control, see Section 4.4.4.4. 4.4.4.2 Null Pulsed Mode Engine Speed Open Open Clutch CSMV/ UL1 and UL2 Output EVXV Engage Unload...

  • Page 86: Overrides

    4.4.7 Overrides With the complex control interactions in use with the APX Control System there are many user selected and pre- programmed software overrides and Configuration settings which may change the operation of the unit. Refer to for complete descriptions of these features. Section 4.10 Section 4.11 Temperature Control...

  • Page 87: Stop Parameters

    If SEPARATE is selected, then the following Functional Parameter values will be available for use: • PERISHABLE MINIMUM RUN TIME • PERISHABLE MINIMUM OFF TIME • PERISHABLE RESTART TEMPERATURE • PERISHABLE OVERRIDE TEMP • PERISHABLE MAXIMUM OFF TIME • FROZEN MINIMUM RUN TIME •...
  • Page 88 NOTE In Start-Stop Operation when the setpoint is in frozen range (below +10.4°F = -12°C), the unit will not restart when the temperature is below setpoint except as indicated in the following. 1. Engine coolant temperature drops below selected Configuration value The control system will monitor coolant temperature.

  • Page 89: Start-Stop Operating Sequence

    4.6.4 Start-Stop Operating Sequence The operating sequence for Start-Stop Operation under the default Configuration and Functional Parameter set- tings is provided in .Start-Stop Default Operating Sequence Figure FALLING REFRIGERATED COMPARTMENT TEMPERATURE Pull Down SWITCH POINT +3.6 F (+2.0 C ) +0.5 F (+0.3 C ) Start-Stop Setpoint...
  • Page 90 When the Control Temperature is within the calculated average temperature of set point, Pulldown or Pull-up ends. Once Pulldown or Pull-up ends the system will operate in accordance with Table 4–2 Figure 4.2. The operating sequence for Continuous Operation under the default Configuration and Functional Parameter set- tings is provided in Figure 4.2.

  • Page 91: Autofresh Air Exchange

    AutoFresh Air Exchange AutoFresh Air Exchange is a factory installed option that allows control of the atmospheric conditions within the refrig- erated compartment. When air is being exchanged, two air ports open. The upper port allows fresh ambient air to enter while stale air exits through the lower port.

  • Page 92: Normal Defrost Operation, Ambient Air Temperature Less Than 80°F (26.7°C)

    4.9.2 Normal Defrost Operation, Ambient Air Temperature less than 80°F (26.7°C) Engine Speed Note 3 Open High Clutch UL1 and UL2 CSMV Output Engage Load 100% Open When the ambient air temperature is greater than 35°F (1.7°C) compressor discharge pressure will be monitored during the defrost cycle.

  • Page 93: High Ambient Defrost Termination

    4.9.4.2 High Ambient Defrost Following pump down, the defrost cycle will begin. The controls will be as follows: Engine Speed Note 3 Open High Clutch UL1 and UL2 CSMV Output Disengage Load 100% Open NOTE When in defrost, the unit will operate the same as in heat with the clutch disengaged. 4.9.5 High Ambient Defrost Termination The following sequence will be used for high ambient defrost termination:...

  • Page 94: Temperature Range Lock 1 And 2

    4.10.2 Temperature Range Lock 1 and 2 Range Lock is a group of configurations which may be set to lock the unit into Start-Stop or Continuous Operation for various setpoint ranges. Two ranges are available for selection. Each range can be independently set to lock setpoint temperatures into either Start-Stop or Continuous operation.

  • Page 95: Productshield

    Typically, Range 1 and Range 2 are used to control different setpoint ranges when IntelliSet is not active. For units with IntelliSet, because each IntelliSet is generally programmed for a specific product, only Range Lock 1 is used to hold the unit in either the Start/Stop or Continuous Operation, and Range Lock 2 is left OFF. For example (see 4.3), if Continuous Operation is ALWAYS required whenever the setpoint is between Figure...
  • Page 96 When ProductShield Econo Maximum Temperature is set to OFF, and ProductShield Econo Minimum Temperature is set to a temperature, the ambient air temperature will be considered to be “inside the range” whenever the ambient air temperature is higher than the Minimum Temperature setting, with no upper limit.
  • Page 97 Operation in High Air is controlled by four Configurations; PRODUCTSHIELD HIGH AIR, HIGH AIR MINI- MUM TEMPERATURE, HIGH AIR MAXIMUM TEMPERATURE and HIGH AIR DELTA-T. • The PRODUCT SHIELD HIGH AIR Configuration may be set to OFF or ON. ProductShield High Air is only active when the Configuration is set to ON.

  • Page 98: Air Flow

    NOTE All of the ProductShield settings may be viewed in the Data List (Refer to 3.14). For units with Section IntelliSets, the Data List will reflect the ProductShield settings for the IntelliSet that is currently active. 4.10.4 Air Flow The AIR FLOW Functional Parameter may be set to place the unit in continuous high air flow when the setpoint is in perishable range.

  • Page 99: Unloader Control Overrides

    9. Product Shield High Air The engine is forced to high speed if the PRODUCT SHIELD HIGH AIR Configuration is active, refer to Section 4.10.3 10. High Speed Delay. Whenever the engine starts, the unit will remain in low speed according to the Continuous or Start-Stop High Speed Delay Functional Parameter setting.

  • Page 100: Csmv Control Overrides

    PSIG, the engine will transition to low speed and the compressor will remain running on 4 cylinders. If the condition still does not change, UL2 will unload and the compressor will operate on 2 cylinders, still in low speed. Once the engine transitions to low speed, or one or both of the unloaders unload due to these conditions the unit will remain in low speed, and the unloader(s) will remain unloaded for a minimum of 5 minutes.
  • Page 101 4–21 62-12169...
  • Page 102 62-12169 4–22...

  • Page 103: Control System Interface

    SECTION 5 Control System Interface Interface Methods There are four methods for interfacing with the APX Control System: 1. Driver/Advanced User Interface: Driver and Advanced User Interface activities such as start, stop, Pretrip, reading alarms, reading data and changing Functional Parameters may all be performed using the display mounted keys (refer to Section 2.

  • Page 104: Technician Hour Meters

    3. Press the ▲ or ▼ key to scroll through the list of menu items. Press the “=” key to enter the settings or test modes. Technician mode should be canceled when work is complete. If Technician mode is not canceled, Technician mode will be available for 60 minutes after the last key press without requiring a code, even after placing the SROS in the OFF and then back in the RUN/STOP position.

  • Page 105: Inactive Alarms

    3. The hour meter screen will display with a 15 second timeout. Press the ▲ or ▼ key to scroll through the available selections. With the desired sub-menu highlighted, Press the “=” key to view the data. Engine Protect Hours STANDARD HOUR METERS (2 OF 3) OTHER METERS &...
  • Page 106 Figure 5.3 Inactive Alarms ACTIVE ALARMS NO ACTIVE ALARMS BACK CLEAR INACTIVE ALARMS ALARMS INACTIVE ALARMS I00093 CHECK START-UP BUZZER P00144 CHECK UL1 CIRCUIT P00141 PRETRIP STOPPED BY USER CLEAR CLEAR BACK EXIT INACTIVE 1. Enter the Technician mode, then press the ALARM key. 2.

  • Page 107: Configuration Settings

    5.2.3 Configuration Settings Configuration settings match the control system to the unit and define control system action under various opera- tional conditions. Instructions for working with Configurations are provided below. 1. Enter the Technicians Menu, highlight CONFIGURATION SETTINGS and then press the “=” key. CONFIGURATION SETTINGS (1 OF 11) UN IT IDENTIFICATION SETPOINT(S) &...

  • Page 108: Component Test Mode

    5. To change a value selection screen, press the “=” key with the desired Configuration sub-menu highlighted as in Sample Screen A. The individual Configurations within the sub-menu will display as in Sample Screen B. Press the ▲ or ▼ key to scroll through the individual Configurations. The individual Configurations will highlight as the list is scrolled.
  • Page 109 2. To scroll through the tests press the ▲ or ▼ key. The tests will highlight as the list is scrolled. The available tests include: • UNLOADER 1 - MM output @ 3MM-6 • UNLOADER 2 - MM output @ 3MM-8 •...

  • Page 110: Service Mode

    5.2.5 Service Mode CAUTION Service mode MUST be used whenever removing refrigerant charge, refrigerant leak checking or evacuating. NOTE If the START/RUN - OFF switch is toggled to the OFF position, the System will exit Service mode. Enter Service Mode: 1.

  • Page 111: Usb Memory Devices

    Instructions for using USB memory devices with the APX Control System are provided below. 5.3.1 Data Transfer USB Memory Device Carrier Transicold APX USB Flash Drive, CTD P/N 12-00814-00 must be used: • The device may be used to enter PC mode.
  • Page 112 1. With the START/RUN - OFF switch in the OFF position, remove protective cover from the USB interface port and insert a data transfer USB. The USB activity LED will flash, the Carrier Transicold logo will display and then the MessageCenter will display one or more USB soft key descriptions.

  • Page 113: Downloading Data Files

    1. Data may be downloaded with the system powered up or turned off. Remove protective cover from the USB interface port and insert the Carrier Transicold APX USB flash drive, CTD P/N 12-00814-00. The Mes- sageCenter will display READING USB.

  • Page 114: Installing Software

    Whenever installing new software, it is always a good idea to start the unit and give it a quick check over prior to performing the operation. All units should have the software upgraded to the latest ver- sion, provided for Carrier Transicold dealers on the TransCentral web site. Figure 5.7 Installing Software...
  • Page 115 2. With the system powered or off, remove the protective cover from the USB port and insert USB. The Mes- sageCenter will display READING USB. NOTE If configured to do so, the system will prompt for entry of the data protect PIN code (refer to “PROTECT DATA WITH PIN”, Table 5–1).

  • Page 116: Transferring Configuration Files

    5.3.5 Transferring Configuration Files Instructions for installing configuration files into the control system from a data transfer USB memory device are provided in 5.8. Configuration” (*.set) files consist of one of the following types of files. A “Configuration” file Figure contains a complete set of Configuration, Functional Parameter and Data Recorder settings for the system.

  • Page 117: Tru-Tech And Tru-View

    TRU-Tech and TRU-View The TRU-Tech and TRU-View program allows the user to access and download data, using a computer, when the unit is not running and without starting the eight-hour DataLink data recorder timer. Using the computer will provide additional programming and configuring capabilities that will not be available using the display mounted keys. The DataLink data recorder may also be configured using the TRU-Tech program.

  • Page 118: Microprocessor/Stepper Module (Msm) Replacement

    When field diagnosis of a Carrier Transicold refrigeration unit determines that an APX MSM is not performing properly and must be replaced, the replacement MSM must be setup for this unit and customer by entering the required Con- figurations, Functional Parameters and DataLink data recorder settings.

  • Page 119: Pre-Replacement Steps

    If a USB is not available, the MSM may be setup using TRU-Tech. TRU-Tech allows entry of all required data. If neither a USB memory device or TRU-Tech and service cable is available, the MSM may be setup for immediate use using the display mounted keys.

  • Page 120: Microprocessor/Stepper Module (Msm) Setup

    5.5.3 Microprocessor/Stepper Module (MSM) Setup 1. Ensure that the replacement MSM is in place, all wires connected and the negative battery cable is recon- nected. 2. Make sure the latest software has been loaded to ensure all modules are compatible, refer to Section 5.3.2 When a module is replaced, software should be upgraded before switching the unit on.

  • Page 121: Configurations Via Display Mounted Keys

    NOTES • If a data transfer USB memory device will be used to setup the remainder of the MSM settings, proceed after the settings are entered. Section 5.5.7 • After the unit specific and time sensitive configuration settings are complete use the ▲ or ▼ key until “CONFIGS COMPLETE, = TO EXIT”...
  • Page 122 Table 5–1 Configuration Settings Configuration Selections Description Press the ▲ or ▼ keys to display configurations: UNIT IDENTIFICATION SETPOINT(S) & RANGE LOCK CONFIGURATION SETTINGS (1 OF 11) START-STOP SETTINGS UN IT IDENTIFICATION INTELLISET & PRODUCT SHIELD SETPOINT(S) & RANGE LOCK ENGINE ALARMS START-STOP SETTINGS ALARM SETTINGS...
  • Page 123 Table 5–1 Configuration Settings Configuration Selections Description SETPOINT(S) and RANGE LOCK DECIMAL DISPLAYED DISPLAYED = setpoint will be shown with a decimal and temperatures may be selected to a tenth of a de- NOT DISPLAYED gree. NOT DISPLAYED = setpoint will not be shown with a decimal.
  • Page 124 Table 5–1 Configuration Settings Configuration Selections Description S/S PARAMETERS TOGETHER = When the Minimum Run Time, Mini- TOGETHER mum Off Time, Restart Temperature, Maximum Off SEPARATE Time, and Override Temperatures are set in the Functional Parameter List, the same values will be used for both Frozen and Perishable setpoints.
  • Page 125 Table 5–1 Configuration Settings Configuration Selections Description • ECONO DELTA-T OFF = Delta-t is not used in determining when the NOTE: This is available for +3.6°F to +27.0°F unit will go into Econo: Go To Start/Stop Mode. “Go to S/S” only. Not avail- (+2°C to 15°C) ...
  • Page 126 Table 5–1 Configuration Settings Configuration Selections Description ENGINE SETTINGS GLOW TIME SHORT Indicates to the MSM which engine is in the system. LONG LONG = Glow Plug equipped and longer glow times INTAKE HEATER are used (TV engines). SHORT= Glow Plug equipped and shorter glow times are used (DI engines).
  • Page 127 Table 5–1 Configuration Settings Configuration Selections Description EES SYSTEM INSTALLED Indicates if Diesel Particulate Filter is installed. Not Installed (DPF Installed) Installed ALARM SETTINGS OUT OF RANGE  YES / NO YES = When the refrigerated compartment tempera- SHUTDOWN ture has been out-of-range for 45 minutes, the alarm light will come on, and the unit will shut down.
  • Page 128 Table 5–1 Configuration Settings Configuration Selections Description COMPRESSOR ALARM YES / NO If the “Compressor Alarm Shutdown” option has SHUTDOWN been installed (refer to Unit Data), this setting will be (This Configuration is an op- available. tion, it will not display if the YES = The unit will shutdown and not restart when option is not installed.) 00013 High Discharge...
  • Page 129 Table 5–1 Configuration Settings Configuration Selections Description DIESEL RESET VALUE When the engine maintenance hour meter is reset, the value selected here will be added to the present (Refer to for oil/ 50 to 30,000 hours in 50 hour Table 8–1 meter reading to indicate to the microprocessor filter change intervals.) increments...
  • Page 130 Table 5–1 Configuration Settings Configuration Selections Description DOOR SWITCH ALARM ONLY = When a door switch indicates that ALARM ONLY the door is open, a warning alarm will be displayed in UNIT SHUTDOWN the MessageCenter. LOW ENGINE SPEED UNIT SHUTDOWN = When a door switch indicates DATA RECORDER ONLY that the door is open, a warning alarm will be dis- played in the MessageCenter, and the unit will shut-...
  • Page 131 Table 5–1 Configuration Settings Configuration Selections Description REMOTE SWITCH 1 ALARM ONLY = When the switch is activated, a ALARM ONLY warning alarm will be displayed in the Message- UNIT SHUTDOWN Center. LOW ENGINE SPEED UNIT SHUTDOWN = When the switch is activated, DATA RECORDER ONLY a warning alarm will be displayed in the Message- Center, and the unit will shutdown.
  • Page 132 Table 5–1 Configuration Settings Configuration Selections Description SATELLITE COMM OTHER = The microprocessor is set for communica- OTHER tion from other 3rd party providers. (This configuration is an op- QUALCOMM QUALCOMM = The microprocessor is set for com- tion, it will not display if the 9600Bps munications from Qualcomm Trailer Tracs option is not installed.)
  • Page 133 Table 5–1 Configuration Settings Configuration Selections Description NUMBER OF REMOTE NOT INSTALLED = there is no remote panel NOT INSTALLED PANELS 1 REMOTE PANEL installed on this unit. INSTALLED 1 REMOTE PANEL INSTALLED = There is a remote panel installed. SETPOINT CHANGE NO = There will be no alarm for a setpoint not ALARM...
  • Page 134 Table 5–1 Configuration Settings Configuration Selections Description AUTO FRESH AIR SETTINGS AUTOFRESH AIR NOT INSTALLED = AutoFresh Air Exchange is not NOT INSTALLED installed. STANDARD STANDARD = AutoFresh Air Exchange is installed. AUTOFRESH AIR DELAY SETPOINT - Once the compartment temperature SETPOINT has reached setpoint 1.5°F (0.8°C), the Auto- Fresh 0-48 HOURS IN 1 HOUR ...

  • Page 135: Messagecenter Messages

    SECTION 6 MessageCenter Messages MessageCenter Messages The following table lists all of the messages which do not appear in other lists in this manual and a description of their meaning. Refer to for a list of Alarm messages. Refer to for a list of Unit Data mes- Section 9 Section 3.14...
  • Page 136 Table 6–1 MessageCenter Messages Message Description DOOR OPEN - LOW SPEED A refrigerated compartment door is open forcing the unit to run in low speed. ENTERING SERVICE MODE The initial message for Service mode. ERROR: ENG HRS > SWITCH When setting up a replacement microprocessor, incorrect hours have been ON HRS entered.
  • Page 137 Table 6–1 MessageCenter Messages Message Description PRODUCTSHIELD: ECONO The unit is operating in ProductShield Econo which overrides normal unit Start- Stop or Continuous Run operation. Refer to Section 4.10.3. PRODUCTSHIELD: HIGH AIR The unit is operating in ProductShield High Air which overrides normal unit speed operation.
  • Page 138 Table 6–1 MessageCenter Messages Message Description TIME SELECTION NOT A time change was started but not entered (saved) in the Configuration List. CHANGED TRIP START ENTERED The Trip Start marker has been placed in the DataLink data recorder. UNIT BATTERY TOO LOW The unit battery has dropped below 7 volts for more than 10 seconds.

  • Page 139: Alarm Troubleshooting

    SECTION 7 Alarm Troubleshooting 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 properly trained personnel only. Introduction This section provides guidance for troubleshooting alarms. The alarm light will be illuminated when there is at least one alarm stored in the system.

  • Page 140: Notes

    Notes NOTE Note 1: The active alarm list may be cleared when in the Driver mode or Advanced User mode by pressing the CLEAR ALARMS soft key. That is: the alarm is “cleared” from the active alarm list and moved to the inactive alarm list for later review if the condition that caused the alarm has been corrected.

  • Page 141: Alarms

    Alarms 00001 Low Fuel Level Warning NOTE This is an optional alarm which will only occur when a fuel level sensor is present and configured “YES”. • ACTIVATION: The ENCU circuit is energized (PM-32, ENCU-44) and fuel level is 15% or less for more than 30 seconds.
  • Page 142 00011 Check Engine Oil Pressure NOTE This alarm may be activated if too high a viscosity oil is used in cold ambient. • ACTIVATION: The ENCU circuit is energized (PM-32) and engine oil pressure is below 12 psig (0.82 bar) for longer than five seconds while the engine is running.
  • Page 143 00012 High Coolant Temperature • ACTIVATION: Condition 1: Ambient temperature is below 120°F (48.9°C) and engine coolant temperature is above 230°F (110°C). Condition 2: Ambient temperature is above 120°F (48.9°C) and engine coolant temperature is above 241°F (116°C). Condition 3: Ambient temperature is at or above 120°F (48.9°C) and the engine coolant temperature has remained between 230 and 241°F (110 and 116°C) for more than five minutes.
  • Page 144 00012 High Coolant Temperature (continued) 5. Check Engine Coolant Temperature Sensor (ENCT) a. Refer to procedure for alarm Sensor. Alarm condition must be 00129 Check Engine Coolant corrected and the alarm cleared to continue. b. Inspect sensor, and connector pins and terminals. Verify that there is no damage to sensor. Verify that there is no damage, moisture or corrosion in connector.
  • Page 145 00013 High Discharge Pressure • ACTIVATION: Compressor discharge pressure switch (HPS) contacts are open. HPS contacts open when the discharge pressure rises to 465 psig (32 bar). • UNIT CONTROL: Shutdown and alarm. • RESET CONDITION: Auto reset after 15 minutes if the compressor discharge pressure falls below 350 psig (24 bar) or alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
  • Page 146 00015 Battery Voltage Too High • ACTIVATION: Battery voltage at the MSM or PM is greater than 17 VDC. • UNIT CONTROL: Shutdown and alarm. • RESET CONDITION: Auto reset after 15 minutes when the voltage at the main microprocessor is between 11 and 14 VDC, or alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
  • Page 147 00016 Battery Voltage Too Low • ACTIVATION: Battery voltage at the Power Module is less than 10 VDC (except when the engine starter is engaged). • UNIT CONTROL: Shutdown and alarm. Alarm condition only if activated while starting unit. • RESET CONDITION: Auto reset after 15 minutes when the voltage at the main microprocessor is between 11 - 14 VDC, or alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
  • Page 148 00017 High Comp Discharge Temp • ACTIVATION: Alarm is not active AND: 00125 Check Comp Discharge Sensor Ambient temperature is below 120°F (48.9°C) and discharge temperature is greater than 309°F (154.4°C) for three minutes, or ambient temperature is above 120°F (48.9°C) and discharge tem- perature is greater than 340°F (171.1°C) for three minutes, or discharge temperature exceeded 350°F (176.7°C).
  • Page 149 00018 Low Refrigerant Pressure • ACTIVATION: The compressor is operating with the suction pressure less than -3 psig (-0.20 bar) for more than the LP SHUTDOWN DELAY Configuration (up to five minutes) with RAT above -10°F (-23.3°C) or less than -8 psig (-0.53 bar) with RAT at any temperature. •...
  • Page 150 00019 Low Fuel Shutdown NOTE This is an optional alarm. This alarm will only occur if the Fuel Level Sensor Configuration is YES. • ACTIVATION: The fuel level is 10% or less for more than 30 seconds AND Alarm 00126 Check Fuel Sen- is not active.

  • Page 151: Corrective Actions

    00021 Technician Reset Required • ACTIVATION: The High Engine Temperature Shutdown Configuration and/or Engine Oil Pressure Shut- down Configuration is/are set to YES and Alarm 00011 Check Engine Oil Pressure, 00012 High Cool- Temperature, or - Check Engine Coolant sensor has 00129 Check Engine Coolant Sensor become active and shut the unit down three times within the past 2 hours.
  • Page 152 00027 High Suction Pressure • ACTIVATION: The refrigeration system is running and suction pressure has been greater than 98 psig (6.7 bar) for more than 10 minutes. • UNIT CONTROL: Alarm only or (if configured for shutdown) engine and unit shutdown and alarm. •...
  • Page 153 00028 Check Refrigeration System • ACTIVATION: Condition 1: When system has been operating in Pulldown for more than five minutes and delta-t (SAT - RAT) is between -3.0°F (-1.7°C) and +5°F (+2.8°C). Condition 2: Discharge pressure is not at least 5 psig (0.34 bar) higher than suction pressure for more than 10 minutes.
  • Page 154 00029 Check Heat Cycle • ACTIVATION: The unit has been operating in the heat cycle for more than five minutes and the SAT is more than 5.5°F (3°C) colder than the RAT constantly for more than 60 seconds. (Unit is actually cooling the air going through the evaporator).
  • Page 155 00031 Failed to Start - Auto Mode • ACTIVATION: Engine has tried to start three times unsuccessfully. • UNIT CONTROL: Shutdown and alarm. • RESET CONDITION: Alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
  • Page 156 00034 Engine Failed to Stop • ACTIVATION: Engine is turning more than 500 RPM for 20 seconds after unit shutdown or cycled off. • UNIT CONTROL: Shutdown and alarm. • RESET CONDITION: Alarm may be manually reset via keypad or by turning the unit off, then back on again.

  • Page 157: Check Starter

    00035 Check Starter Circuit • ACTIVATION: Engine speed fails to reach 50 rpm during 2 start attempts. • UNIT CONTROL: Shutdown and alarm. • RESET CONDITION: Alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
  • Page 158 00036 Check Coolant Temperature • ACTIVATION: Coolant temperature is below 32°F (0°C) after the engine has been running for five min- utes. • UNIT CONTROL: Alarm only. • RESET CONDITION: Auto reset when coolant temperature is higher than 36°F (2.2°C) or alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
  • Page 159 00037 Check Low Speed RPM • ACTIVATION: The control system is calling for low engine speed operation and engine speed is less than 1200 rpm or greater than 1500 rpm for more than 60 seconds (120 seconds when the control system calls for a change from high to low speed, or when unit first starts).
  • Page 160 00038 Check High Speed RPM • ACTIVATION: The control system is calling for high speed operation and engine speed is less than 1650 rpm, or greater than 1950 rpm for more than 60 seconds (120 seconds when the control system calls for a change from low to high speed, or when unit first starts).
  • Page 161 00039 Check Engine RPM • ACTIVATION: Alarm is not active and engine speed is less than 1200 00130 Check Engine RPM Sensor rpm or greater than 1950 rpm for five minutes. • UNIT CONTROL: Alarm only or (if configured for shutdown) shutdown and alarm. •...
  • Page 162 00040 Check Engine Preheat Circuit • ACTIVATION: Engine Operation: Intake Air Heater amperage is less than 25 Amps, or greater than 70 Amps after 14 seconds of glow time (NOTE: This can only occur when the Engine Coolant Temperature is below 50°F (11°C) due to preheat time allowed.
  • Page 163 00041 Engine Stalled • ACTIVATION: The control system is calling for the engine to run, Engine speed sensor is good and engine speed is less than 10 rpm; or Alarm is ON and the oil pres- 00130 Check Engine RPM Sensor sure switch contacts are open.

  • Page 164: Check Engine

    00041 Engine Stalled (continued) 5. Check Engine Speed Sensor (ENSSN): Inspect harness, connector pins and terminals (see wiring schematic). Verify that there is no physical damage to harness, and no damage, moisture or corrosion in connectors. 6. Check Engine Air Intake System a.
  • Page 165 00051 Alternator Not Charging • ACTIVATION: Unit is running and the current flow is less than -1.0 amps (discharge) between the alterna- tor and the battery for three continuous minutes. • UNIT CONTROL: Alarm only, or if Alternator Check Shutdown Configuration is set to “YES” shutdown and alarm.
  • Page 166 00053 Box Temp Out-of-Range • ACTIVATION: Condition One: If the unit is running in Pulldown and the SAT is not greater than 1°F (0.56°C) below the RAT or if the unit is running in Pull-Up and the SAT is not above the RAT, the configured action (Alarm only after 30 minutes or Alarm and Shutdown after 45 minutes) will be activated.
  • Page 167 00053 Box Temp Out-of-Range (continued) Corrective Actions: 1. Check Compartment Doors: Must be closed and not allowing any air leakage. 2. Defrost Evaporator: Initiate manual defrost cycle. Defrost must terminate automatically. Verify that all ice is cleared from the evaporator coil. 3.
  • Page 168 00054 Defrost Not Complete • ACTIVATION: Defrost cycle did not terminate automatically. (DTT and SAT did not reach termination tem- perature of 55°F/12.8°C within 45 minutes or the SAT rose to 120°F/48.9°C during the cycle.) • UNIT CONTROL: Alarm Only. While this alarm is active, the defrost timer will be temporarily set to initiate a defrost cycle 1.5 hours of unit running time after the alarm comes on.
  • Page 169 00055 Check Defrost Air Switch (DAS) • ACTIVATION: The defrost air switch has called for a defrost cycle within eight minutes of a defrost termi- nation for two consecutive defrost cycles. (The air switch contacts were closed continuously for 15 sec- onds before the defrost cycle was started.) •...
  • Page 170 00056 Check Evaporator Air Flow • ACTIVATION: In Heat mode, the suction pressure has been higher than 100 PSIG (6.8 bar) for more than 60 seconds OR In Cool mode, SAT is 5°F (2.8°C) or more warmer than RAT for 3.5 minutes. After the first occurrence of this alarm, the MessageCenter will display “NO TEMP CONTROL - SEE ALARM LIST”.

  • Page 171: Check Wiring

    00057 Check Remote Switch1 (REMS1) • ACTIVATION: REMS1 is set to trigger an alarm if the switch is activated (opened or closed, depending on switch type) for more than five seconds. • UNIT CONTROL: May be configured as alarm only, alarm and force low engine speed, or alarm and shut- down.

  • Page 172: Corrective Actions

    Download previous data using a Data Transfer USB memory device or TRU-Tech. Data retrieval OK. b. Replace and setup MSM. Refer to Section 5.5. NOTE Specific Configurations may be found on the TransCentral Website (authorized Carrier Transicold Dealers only). 00060 DataLogger (DataLink data recorder) Time Wrong •...
  • Page 173 00061 Door Open (DS1) • ACTIVATION: DS1 is set to trigger an alarm if the switch is activated (opened or closed, depending on switch type) for more than five seconds. • UNIT CONTROL: May be configured as alarm only, alarm and force low engine speed, or alarm and shut- down.

  • Page 174: Service

    00066 Check Evap Sensor Group • ACTIVATION: The unit has been shut off for at least 48 hours. During wake up, a temperature comparison of the Evaporator Temperature Sensors (RAT, SAT, DTT) is performed. If the highest and the lowest temperature readings are more than 3.6°F (2.0°C) apart this alarm will be activated. ...

  • Page 175: Clutch

    00078 Check SV1 Circuit • ACTIVATION: A problem has been detected in the SV1 coil circuit. If this alarm is activated while the unit is operating in heat or defrost, the circuit is detected shorted. If this alarm is activated while the unit is operating in cool, the circuit is detected open.
  • Page 176 00079 Check SV4 Circuit • ACTIVATION: A problem has been detected in the SV4 coil circuit. If this alarm is activated while the unit is operating in heat or defrost, the circuit is detected shorted. If this alarm is activated while the unit is operating in cool, the circuit is detected open.
  • Page 177 00081 Check FHR Circuit • ACTIVATION: A problem has been detected in the fuel heater relay coil circuit. If this alarm occurs while the fuel heater circuit is operating, the circuit is detected shorted. If this alarm occurs while the fuel heater circuit is not operating, the circuit is detected open.
  • Page 178 00085 Check UL1 Circuit • ACTIVATION: A problem has been detected in the front unloader (UL1) coil circuit. If this alarm is acti- vated while the control system is calling for UL1 to be energized, the circuit is detected shorted. If this alarm occurs at any other time, the circuit is detected open.
  • Page 179 00086 Check UL2 Circuit • ACTIVATION: A problem has been detected in the front unloader (UL2) coil circuit. If this alarm is acti- vated while the control system is calling for UL2 to be energized, the circuit is detected shorted. If this alarm occurs at any other time, the circuit is detected open.
  • Page 180 00090 CHK AFA Solenoid Circuit • ACTIVATION: A problem has been detected in the AutoFresh Air Exchange relay coil circuit. If this alarm is activated while the control system is calling for AFAR to be energized, the circuit is detected shorted. If this alarm occurs at any other time, the circuit is detected open.
  • Page 181 00093 Check Starter Buzzer • ACTIVATION: The Buzzer (B) circuit is shorted or open. • UNIT CONTROL: Alarm only. • RESET CONDITION: Auto reset when Buzzer amp draw is normal, or alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again. NOTE Follow the steps below until a problem is found.
  • Page 182 00121 Check Ambient Air Sensor • ACTIVATION: Ambient Air Temperature Sensor (AAT) is not within range of -53 to +158°F (-47° to +70° C). • UNIT CONTROL: Alarm and a value of 122°F (50°C) will be used for any calculations. •...
  • Page 183 00122 Check Return Air Sensor (RAT) • ACTIVATION: Return Air Temperature Sensor (RAT) is not within range of -53 to +158°F (-47 to +70° C). • UNIT CONTROL: If Alarm is not active: Alarm and switch to supply air 00123 Check Air Supply Sensor control.
  • Page 184 00123 Check Air Supply Sensor • ACTIVATION: Supply Air Temperature Sensor (SAT) is not within range of -53 to +158°F (-47 to +70° C). • UNIT CONTROL: If Alarm is not active, Functional Parameter 00122 Check Return Air Sensor (RAT) Temperature Control is set for Supply Air and setpoint is in perishable range: Alarm and switch to return air control.
  • Page 185 00125 Check Comp Discharge Sensor • ACTIVATION: Compressor Discharge Temperature Sensor (CDT) is not within the range of -40° to +392°F (-40° to +200°C). • UNIT CONTROL: Alarm Only. • RESET CONDITION: Auto reset when sensor is in range or, alarm may be manually reset using the dis- play mounted keys or by turning the unit off, then back on again.
  • Page 186 00126 Check Fuel Sensor Circuit • ACTIVATION: The fuel level sensor is configured “YES” and the reading (in Unit Data) is less than 2% for 30 seconds. • UNIT CONTROL: Alarm Only. • RESET CONDITION: Auto reset when fuel level is sensed above 4% for 30 seconds or, alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
  • Page 187 00127 Check Suction Temp Sensor • ACTIVATION: Compressor Suction Temperature Sensor (CST) is not within the range of -53 to +158°F  (-47 to +70°C.) • UNIT CONTROL: Alarm only. • RESET CONDITION: Auto reset or alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
  • Page 188 00130 Check Engine RPM Sensor • ACTIVATION: If ambient temperature is above 32°F (0°C), and this is the second or third start attempt, and the engine oil pressure switch is closed (oil pressure good), and engine speed is sensed at less than 1000;...
  • Page 189 00131 Check Evap Temp Sensor • ACTIVATION: Evaporator Outlet Temperature Sensor (EVOT) is not within the range of -53 to +158°F  (-47 to +70°C) • UNIT CONTROL: Alarm only and superheat for EVXV will be calculated using SAT or DTT if alarm 00123 is active.
  • Page 190 00132 Check Defrost Term 2 Sensor NOTE The APX Control System uses one Defrost Termination Sensor (DTT) and that sensor will activate this “CHECK DEFROST TERM 2 SENSOR” alarm. • ACTIVATION: Defrost Termination Temperature Sensor (DTT) is not within the range of -58 to +266°F (-50 to +130°C).

  • Page 191: Check Sensor

    00133 Check Remote Temp Sensor 1 00134 Check Remote Temp Sensor 2 • ACTIVATION: Remote Temperature Sensor (REMSN1 or REMSN2) is not within the range of -53 to +158°F (-47 to +70°C.) • UNIT CONTROL: Alarm only. • RESET CONDITION: Auto Reset when sensor is in range or, alarm may be manually reset via keypad or by turning the unit off, then back on again.
  • Page 192 P00141 Pretrip Stopped by User • ACTIVATION: Pretrip cycle was stopped by user before the Pretrip cycle ended automatically. • UNIT CONTROL: Alarm Only. • RESET CONDITION: Alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
  • Page 193 P00144 Check UL1 Circuit • ACTIVATION: The circuit current draw is outside the normal range. • UNIT CONTROL: Pretrip will fail in test 2 and display “PRETRIP FAIL AND COMPLETED”. • RESET CONDITION: Auto reset if Pretrip is started again, or alarm may be manually reset using the dis- play mounted keys or by turning the unit off, then back on again.
  • Page 194 P00152 Check Fuel/Speed Actuator Circuit • ACTIVATION: The circuit current draw is outside the normal range. • UNIT CONTROL: Pretrip will fail in test 2 and display “PRETRIP FAIL AND COMPLETED”. • RESET CONDITION: Auto reset if Pretrip is started again or alarm may be manually reset using the dis- play mounted keys or by turning the unit off then back on again.
  • Page 195 P00157 Check Battery Current • ACTIVATION: With all circuits off, current flow of more than +1.5 to -2.0 amps is detected in the 12 VDC electrical circuits. If this alarm occurs, Pretrip Test #2 will be skipped and Pretrip Test #3 will start. Refer to for Pretrip information.
  • Page 196 P00161 Check Suction Temp Sensor • ACTIVATION: Compressor Suction Temperature Sensor (CST) is not within the range of -40 to +392°F  (-40 to +200°C.) • UNIT CONTROL: Pretrip will fail and display “PRETRIP FAIL AND COMPLETED”. • RESET CONDITION: Auto reset if Pretrip is started again or alarm may be manually reset using the dis- play mounted keys or by turning the unit off then back on again.
  • Page 197 P00165 Cannot Pump Down • ACTIVATION: With SV1, SV4 and EVXV closed, the compressor is not able to pull the low side of the refrigerant system down to 10 PSIG (0.68 bar). • UNIT CONTROL: Pretrip will abort and “PRETRIP FAILED IN TEST 12, 13 or 14” will be displayed in MessageCenter.
  • Page 198 P00175 Check High Speed RPM • ACTIVATION: In Test #8 with the CAN calling for high speed, engine speed is NOT between 1650 and 1950 rpm. • UNIT CONTROL: Pretrip will fail and display “PRETRIP FAIL AND COMPLETED”. • RESET CONDITION: Auto reset if Pretrip is started again, or Alarm may be manually reset using the dis- play mounted keys or by turning the unit off, then back on again.
  • Page 199 P00178 Check UL1 • ACTIVATION: The pressure differential between suction and discharge pressures did not change as expected when the Front Unloader (UL1) was de-energized / loaded (discharge pressure should rise and suction pressure should drop) or when it was energized / unloaded (discharge pressure should drop and suction pressure should rise.
  • Page 200 P00180 Check Suction Modulation Valve • ACTIVATION: With the unit running in Pretrip Test #10, after the microprocessor attempts to close CSMV, the suction pressure fails to drop to the proper range. • UNIT CONTROL: Pretrip will fail and display “PRETRIP FAIL IN TEST 10”. •...
  • Page 201 P00181 Check SV4 Valve • ACTIVATION: Suction pressure did not rise within range and discharge pressure did not drop within range when SV4 was energized (opened). • UNIT CONTROL: Alarm only. • RESET CONDITION: Auto reset if Pretrip is started again or alarm may be manually reset using the dis- play mounted keys or by turning the unit off then back on again.
  • Page 202 P00191 Check UL2 • ACTIVATION: The pressure differential between suction and discharge did not change as expected when the Rear Unloader (UL2) was de-energized / loaded (discharge pressure should rise and suction pres- sure should drop) or when it was energized / unloaded (discharge pressure should drop and suction pres- sure should rise.
  • Page 203 P00194 High Suction Pressure • ACTIVATION: This alarm is generated during Test #4 in Cool Pretrip, suction pressure is higher than nor- mal. • UNIT CONTROL: Alarm Only • RESET CONDITION: Auto reset if Pretrip is started again, or alarm may be manually reset using the dis- play mounted keys or by turning the unit off, then back on again.
  • Page 204 P00196 High Discharge Pressure • ACTIVATION: This alarm is generated during Test #4 in Cool Pretrip. Discharge pressure is higher than normal. (“Normal” discharge pressure for systems operating in Cool mode can be estimated by taking the temperature of the air entering the condenser coil (Ambient Air Temperature AAT) and adding 30°F (16.6° C) to it, then looking at a pressure temperature chart-see Table 8–3 for the corresponding pressure.)
  • Page 205 P00198 Low Discharge Pressure • ACTIVATION: In Pretrip heat, the compressor discharge pressure did not rise to normal. (“Normal” dis- charge pressure for systems operating in Pretrip heat can be estimated by adding 80 psig (5.5 bars) toe the saturation temperature of the air entering the condenser (ATS reading). •...
  • Page 206 P00200 Check UL1 Cylinders • ACTIVATION: A problem has been detected inside the front cylinder head of the compressor with a cylin- der suction valve, cylinder discharge valve, head gasket or valve plate gasket. • UNIT CONTROL: Alarm Only • RESET CONDITION: Auto reset if Pretrip is started again, or alarm may be manually reset using the dis- play mounted keys or by turning the unit off, then back on again.
  • Page 207 P00202 High Side Leak • ACTIVATION: Refrigerant pressure is leaking past one of the components in the high pressure side of the refrigeration system into the low pressure side. • UNIT CONTROL: Alarm Only • RESET CONDITION: Auto reset if Pretrip is started again, or alarm may be manually reset using the dis- play mounted keys or by turning the unit off, then back on again.
  • Page 208 P00204 Low Suction Pressure • ACTIVATION: Suction Pressure is less than -10inHg (-0.34 bar) for more than 30 continuous seconds or less than -16inHg (-0.54 bar) for more than five seconds at any time during Pretrip. • UNIT CONTROL: Pretrip will abort and “PRETRIP FAILED IN TEST X” will be displayed in MessageCen- ter indicating in which test the suction pressure was too low.
  • Page 209 P00205 CHK Defrost TERM 2 Sensor NOTE The APX Control System uses one Defrost Termination Sensor (DTT) and that sensor will trigger this “CHK DEFROST TERM 2 SENSOR” alarm. • ACTIVATION: Defrost Termination Temperature Sensor is not within the maximum range of -53°F to +158°F (-47°C to +70°C).
  • Page 210 00225 General Maintenance Due • ACTIVATION: The General Maintenance Hour Meter time has expired. • UNIT CONTROL: Alarm Only. Alarm Light will NOT be turned on. • RESET CONDITION: Alarm may be manually reset using the display mounted keys. Corrective Actions: 1.
  • Page 211 00227 Service Soon - PM #2 Due • ACTIVATION: The Maintenance Hour Meter #2 time has expired. • UNIT CONTROL: Alarm Only. Alarm Light will NOT be turned on. • RESET CONDITION: Alarm may be manually reset using the display mounted keys. Corrective Actions: 1.
  • Page 212 00229 Service Soon - PM #4 Due • ACTIVATION: The Maintenance Hour Meter #4 time has expired. • UNIT CONTROL: Alarm Only. Alarm Light will NOT be turned on. • RESET CONDITION: Alarm may be manually reset via keypad. Corrective Actions: 1.

  • Page 213: Reset Microprocessor

    Enter correct Model Number. Check Model Number on Nameplate. Select the correct model num- ber in the “MODEL NUMBER” Configuration. If correct model number is not found, install (or have Carrier Transicold dealer install) latest software revision. 2. Reset Microprocessor a.
  • Page 214 00237 Function Parameters Error • ACTIVATION: There is an error in one or more of the Functional Parameters that are stored in the main microprocessor memory. • UNIT CONTROL: Incorrect Functional Parameter(s) will be automatically set for default value. • RESET CONDITION: Auto reset when valid Functional Parameters are entered, or alarm may be manu- ally reset by turning the unit off, then back on again.
  • Page 215 00238 Configurations Error • ACTIVATION: There is an error in the Configuration settings stored in the main microprocessor memory. • UNIT CONTROL: Incorrect Configuration(s) will be automatically set for default value. • RESET CONDITION: Auto reset when valid Configuration(s) are entered, or alarm may be manually reset by turning the unit off, then back on again NOTE Follow the steps below until a problem is found.
  • Page 216 Corrective Actions: 1. Check Microprocessor Software Revision: Check microprocessor software. Unit should have the soft- ware upgraded to the latest version, provided for Carrier Transicold dealers on the TransCentral site. 2. Reset Microprocessor a. Place the START/RUN-OFF switch in the OFF position. Disconnect negative battery cable, remove F1 fuse, wait 20 seconds and reinstall.
  • Page 217 00248 Controller Info NVD Failure • ACTIVATION: Configuration is out of range. • UNIT CONTROL: Shutdown and alarm. • RESET CONDITION: Auto reset only when valid info is entered. NOTE Follow the steps below until a problem is found. Once a repair or correction has been made, clear the alarm(s).
  • Page 218 Corrective Actions: 1. Check Software Revision: Check microprocessor software. Unit should have the software upgraded to the latest version, provided for Carrier Transicold dealers on the TransCentral site. 2. Reset Microprocessor a. Place the START/RUN-OFF switch in the OFF position. Disconnect negative battery cable, remove F1 fuse, wait 20 seconds and reinstall.
  • Page 219 Once Emergency Bypass mode has been activated, the unit will operate normally for 24 hours, a countdown timer will be shown on the display. This 24-hour window of operation will keep the load safe and provide enough time to contact the nearest Carrier Transicold Service Center for repair of the unit.
  • Page 220 03001 Engine Load Calibration • ACTIVATION: Activate alarm if: Condition 1 = At engine start if engine throttle sensor (Rack Position Sensor) value is less than 90%. Condition 2 = After start if the sensor value does not drop below 90% within five seconds. Condition 3 = At engine shutoff if the sensor value does not drop below 10% within five seconds.
  • Page 221 05006 Power Enable Relay Fuse Alarm • ACTIVATION: Fuses F8: F13 must be in a failed state in order to trigger the Power Enable Relay (PER) Fuse Alarm. • UNIT CONTROL: Shutdown and Alarm. • RESET CONDITION: Replace fuse or fix fuse issue. NOTE Follow the steps below until a problem is found.
  • Page 222 05007 Bad F3 Fuse • ACTIVATION: Stepper Board Fuse Alarm; Feedback from Stepper Board indicates fuse is missing or blown. Signal must be present for at least three seconds. • UNIT CONTROL: Alarm only. • RESET CONDITION: Replace fuse or fix fuse issue. NOTE Follow the steps below until a problem is found.
  • Page 223 05012 Check ENCU Power Circuit NOTE When operation of the engine is required the Power Module will provide a signal from terminal PM- 32. This signal has been referred to as the “run relay”, based on pre-APX Control Systems that had an actual relay in place.
  • Page 224 05013 Check Clutch Circuit • ACTIVATION: A problem has been detected in the clutch coil (CLH) circuit. If this alarm is activated while the control system is calling for CLH to be energized, the circuit is detected shorted. If this alarm occurs at any other time, the circuit is detected open.
  • Page 225 05014 Check Starter Solenoid Circuit • ACTIVATION: A problem has been detected in the starter solenoid coil (SS) circuit. If this alarm is acti- vated while the control system is calling for SS to be energized, the circuit is detected shorted. If this alarm occurs at any other time, the circuit is detected open.
  • Page 226 05017 Check Glow Plug Relay • ACTIVATION: A problem has been detected in the engine preheat enable circuit (EPHT). If this alarm is activated when the circuit is energized, the circuit is detected shorted. If this alarm is activated at any other time, the circuit is detected open.
  • Page 227 05018 Check Power Enable Control • ACTIVATION: The Power Enable Control Circuit Feedback is sensed out of range. • UNIT CONTROL: Engine and Electric Operation: Alarm only. • RESET CONDITION: Auto reset when circuit is normal, or alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
  • Page 228 07008 Check Return Air Sensor (RAT2) • ACTIVATION: Return Air Temperature Sensor 2 (RAT2) is not within range of -53 to +158°F (-47 to +70° C). • UNIT CONTROL: If RAT2 is selected as control sensor, switch to RAT sensor. •...
  • Page 229 07009 Return Air Sensors RAT and RAT2 Out-of-Range • ACTIVATION: RAT2 is installed and configured. RAT and RAT2 show different air temperature readings of greater than 3.6°F (2° C) for 10 consecutive minutes, or 25 out of 30 minutes. • UNIT CONTROL: If RAT or RAT2 is selected as control sensor, switch to SAT sensor.
  • Page 230 17000 Check EES Air Control Valve • ACTIVATION: Pretrip alarm • UNIT CONTROL: Alarm only • RESET CONDITION: Alarm may be manually reset using the display mounted keys, or by turning the unit off and then back on again. Corrective Actions: Inspect Air Control Valve 17001 Check EES Fueling System...
  • Page 231 20100 No COMM From Micro to Display NOTE This alarm will be available in the inactive alarm list and download only. It is an indication that an intermittent failure is occurring, causing a break in the circuit sufficient to activate the alarm. •...
  • Page 232 20101 No COMM From Micro to Remote Display • ACTIVATION: Alarm is not active, the number of 21100 No COMM From Any Board to Main Micro remote panels installed is configured as 1 and no sync responses have been received from the Remote Panel Module for 10 seconds.
  • Page 233 21100 No COMM From Any Board to Main Micro NOTE This alarm will be available in the inactive alarm list and download only. It is an indication that an intermittent problem has occurred and a careful diagnosis is required. • ACTIVATION: Micro Stepper Module cannot communicate with any modules over the CAN bus.
  • Page 234 22101 Sensor Input Voltage Low INP1 • ACTIVATION: The Voltage Supply for the sensors on the MSM is below the low voltage limit (4.5V). • UNIT CONTROL: Alarm only. • RESET CONDITION: Auto reset when voltage is correct, alarm reset or alarm may be manually reset by turning the unit off, then back on again.
  • Page 235 22402 Check Remote Amber Light • ACTIVATION: The Voltage Supply for the Sensors on the MSM is above the High voltage limit 5.5V • UNIT CONTROL: Alarm only. • RESET CONDITION: Auto reset when sensor voltage is correct, alarm reset or alarm may be manually reset by turning the unit off, then back on again.
  • Page 236 22403 MSM1-IN - Lost Configuration • UNIT CONTROL: Required Shutdown. • RESET CONDITION: Auto reset when communication is restored or alarm may be manually reset by turning the unit off, then back on again. NOTE Follow the steps below until a problem is found. Once a repair or correction has been made, clear the alarm(s).
  • Page 237 23801 Power Module Lost Configuration • ACTIVATION: Power Module reports an invalid configuration. • UNIT CONTROL: Required Shutdown. • RESET CONDITION: Auto reset when communication is restored or alarm may be manually reset by turning the unit off, then back on again. NOTE Follow the steps below until a problem is found.
  • Page 238 25501 Stepper Over Current • ACTIVATION: The stepper current is reported to be too high by 1-2MSM (Indicated by Stepper Output Voltage < 5V) for three seconds as timed at stepper board. • UNIT CONTROL: Alarm only. Steppers on board with problem disabled (Powered OFF) until good power reported from Stepper Board at which point they are re-enabled.
  • Page 239 25503 1-2MSM Lost Configuration • ACTIVATION: Board reports an invalid configuration checksum UNIT CONTROL: REQUIRED SHUTDOWN • RESET CONDITION: Auto reset when communication is restored or alarm may be manually reset by turning the unit off, then back on again. NOTE Follow the steps below until a problem is found.
  • Page 240 26101 Engine Over Heat ENCU • ACTIVATION: Engine water temperature > or = 262°F (128° C) • UNIT CONTROL: Alarm only. • RESET CONDITION: If trigger on message not received for five seconds, alarm reset or alarm may be manually reset by turning the unit off, then back on again. NOTE Follow the steps below until a problem is found.
  • Page 241 26104 Battery Voltage High ENCU • ACTIVATION: ECU recognition of battery voltage is above 18 V. • UNIT CONTROL: Required Shutdown. • RESET CONDITION: If trigger on message not received for five seconds, alarm reset or alarm may be manually reset by turning the unit off, then back on again. NOTE Follow the steps below until a problem is found.
  • Page 242 26106 Sensor Supply Voltage 1 Low • ACTIVATION: Voltage to sensor is below 4.0 V • UNIT CONTROL: Required Shutdown. • RESET CONDITION: If trigger on message not received for five seconds, alarm reset or alarm may be manually reset by turning the unit off, then back on again. NOTE Follow the steps below until a problem is found.
  • Page 243 26109 Actuator Abnormal ENCU • ACTIVATION: Actuator current >3.0A or < 80mA • UNIT CONTROL: Engine Operation: Required Shutdown.  Electric Operation: Will not activate in electric operation. • RESET CONDITION: If trigger on message not received for five seconds, alarm reset or alarm may be manually reset by turning the unit off, then back on again.
  • Page 244 26200 EES Loss of Communication to Controller • ACTIVATION: No ECM CAM messages received for ten seconds. EES has lost communication with the main micro. • UNIT CONTROL: Required Shutdown. • RESET CONDITION: If trigger on message not received for five seconds, alarm reset or alarm may be manually reset by turning the unit off, then back on again.
  • Page 245 26201 EES Service Required • ACTIVATION: Alarms 26202, 26205, 26206, 26208, 26209, 26210, 26216 or 26220 are active. EES is not functional. • UNIT CONTROL: Required Shutdown. • RESET CONDITION: If trigger on message not received for five seconds, alarm reset or alarm may be manually reset by turning the unit off, then back on again.
  • Page 246 26205 EES Filter Inlet Temp • ACTIVATION: Filter Inlet Temp is outside the acceptable range. “26201 -EES SERVICE REQUIRED” will also be active in conjunction with this alarm. • UNIT CONTROL: Required Shutdown. • RESET CONDITION: If trigger on message not received for five seconds, alarm reset or alarm may be manually reset by turning the unit off, then back on again.
  • Page 247 26208 EES Check Fuel Injector (Doser) Circuit • ACTIVATION: Fuel Injector (Doser) current draw is outside acceptable range. “26201 - EES SERVICE REQUIRED” will also be active in conjunction with this alarm. • UNIT CONTROL: Required Shutdown. • RESET CONDITION: If trigger on message not received for five seconds, alarm reset or alarm may be manually reset by turning the unit off, then back on again.
  • Page 248 26210 EES Exhaust Inlet Temp • ACTIVATION: ESEIT reading is outside the acceptable range. “26201 - EES SERVICE REQUIRED” will also be active in conjunction with this alarm. • UNIT CONTROL: Required Shutdown. • RESET CONDITION: If trigger on message not received for five seconds, alarm reset or alarm may be manually reset by turning the unit off, then back on again.
  • Page 249 26213 EES ECM Clock Failure • ACTIVATION: ECM not able to initialize. ECM internal clock has failed. • UNIT CONTROL: Required Shutdown. • RESET CONDITION: If trigger on message not received for five seconds, alarm reset or alarm may be manually reset by turning the unit off, then back on again.
  • Page 250 26216 No Temperature Rise • ACTIVATION: No temperature rise measured during attempted active regeneration. “26201 - EES SER- VICE REQUIRED” will also be active in conjunction with this alarm. • UNIT CONTROL: Required Shutdown. • RESET CONDITION: If trigger on message not received for five seconds, alarm reset or alarm may be manually reset by turning the unit off, then back on again.
  • Page 251 26219 Temp Sensor Drift • ACTIVATION: One of the three temperature sensors differs Drift more than +/-54°F (30°C) from the aver- age temperature of all the temperature sensors. • UNIT CONTROL: Required Shutdown. • RESET CONDITION: If trigger on message not received for five seconds, alarm reset or alarm may be manually reset by turning the unit off, then back on again.
  • Page 252 26221 EES Frequent Regenerations • ACTIVATION: The back pressure is above the threshold limit where the system can safely regenerate. The EES has entered Service mode. “26201 - EES SERVICE REQUIRED” will also be active in conjunc- tion with this alarm. •...
  • Page 253 27200 No COMM From Micro to COMM Module • ACTIVATION: Alarm is not active, and Number Of 21100 No COMM From Any Board to Main Micro Comm Modules Configuration is set to 1, and no sync responses have been received from the Comm Module for 10 seconds.
  • Page 254 26200 EES Loss of Communication to Controller • ACTIVATION: No ECM CAM messages received for ten seconds. EES has lost communication with the main micro. • UNIT CONTROL: Required Shutdown. • RESET CONDITION: If trigger on message not received for five seconds, alarm reset or alarm may be manually reset by turning the unit off, then back on again.
  • Page 255 28002 No COMM From Door Switch • ACTIVATION: The door switch configuration is configured as third-party and no communications have been received for 15 minutes. • UNIT CONTROL: Engine and Electric Operation: Alarm only. • RESET CONDITION: Communications have been received from the door switch. NOTE Follow the steps below until a problem is found.
  • Page 256 28004 Invalid REMS1 28005 Invalid REMS2 • ACTIVATION: The Remote Switch configuration is configured as third-party and data received from the switch is invalid. • UNIT CONTROL: Engine and Electric Operation: Alarm only. • RESET CONDITION: Valid data received from remote switch. NOTE Follow the steps below until a problem is found.
  • Page 257 Unit uses R-404A or R-452A and POE oil. The use of inert gas brazing procedures even if the switch is in the OFF position. is mandatory for all Carrier Transicold Use proper lockout/tagout procedures refrigeration units; otherwise compres- before inspection/servicing. All unit sor failure will occur.

  • Page 258: Section Layout

    Section Layout Service and Maintenance procedures are presented in the following sections: • Scheduled Maintenance - Section 8.2 • Pretrip Inspection - Section 8.3 • External Surface Service (automatic fresh air exchange, grille, surround, and doors) - Section 8.4 • Engine And Engine Related Systems Service - Section 8.5 •...
  • Page 259 1. Check coolant change interval (refer to Section e. of this Section 8.5.14 table). If replacement is not required, check antifreeze  concentration using a refractometer (Carrier Transicold part  number 07-00435-00) 2. Clean condenser/radiator surfaces Section 8.5.14 3. Check water pump Check 4.
  • Page 260 Table 8–1 Maintenance Schedule 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 properly trained personnel only. System Operation Reference Section Unit 1.
  • Page 261 External Surface Service Procedures for servicing or maintaining the automatic fresh air exchange, grille, surround, doors, door latches and display module are provided below. 8.4.1 AutoFresh Fresh Air Exchange Figure 8.1 Automatic Fresh Air Exchange 1. Cover 5. Inlet Connection 2.

  • Page 262: Mounting Bolts

    8.4.2 Remove Grille Insert Figure 8.2 Grille Insert Removal and Door Latch Maintenance NOTE If difficulty is experienced when attempting Grille Insert to remove the grille mounting bolts, the grille Grille Insert Mounting Bolts may be removed with the surround attached to allow access to the mounting clips.
  • Page 263 8.4.4 Door Latch Maintenance and Cable Replacement 8.4.4.1 Door Latch Maintenance Proper maintenance is important for smooth operation of the latch assemblies and the latch pins that are mounted on the unit frame (see 8.2). In order to keep the movable parts clean and lubricated, the use of a de-greas- Figure ing cleaner and LPS 2 lubricant is recommended.
  • Page 264 Engine and Engine Related Service Procedures for servicing the engine, fuel system, engine cooling system and air cleaner are provided in the following sub-paragraphs. 8.5.1 Fuel System The fuel system consists of the fuel tank, mechanical fuel pump, fuel filter, fuel injection pump, the injectors and interconnecting tubing.
  • Page 265 8.5.2 Priming the Fuel System The mechanical fuel pump (Figure 8.6) is mounted on the engine next to the injection pump. This pump has a manual plunger for priming the fuel system when the fuel tank has been run dry. 1.
  • Page 266 8.5.3 Mechanical Fuel Pump Screen, Check/Replace The fuel screen (Figure 8.7) may become plugged or restricted with foreign particles or wax as a result of using the wrong grade of fuel or untreated fuel in cold weather. This will cause the engine to lose power. The screen must be cleaned on a regular schedule such as unit Pretrip or when the oil and fuel filters are changed.
  • Page 267 8.5.5 Spin–On Fuel Filter Replacement 1. Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF position and disabling the starter. 2. Place a shallow pan under Filter (Figure 8.5) and open Water Drain Valve to drain contents. 3.
  • Page 268 8.5.7 Fuel Level Sensor (FLS) An optional Fuel Level Sensor (Figure 8.10) supplies an input signal to the control system as to the percent of fuel remaining in the fuel tank. The control system will activate alarm when fuel level reaches 15%, and (if config- 00001 Low Fuel Level Warning ured to do so) shuts the engine down when fuel level reaches 10%.
  • Page 269 8.5.8 Fuel Heater The optional Fuel Heater (Figure 8.5) applies heat to the fuel in the fuel filter. Heating the fuel dissolves/prevents paraffin wax crystals (and ice) that form when diesel fuel is chilled thus enabling the water separator to work more efficiently and to prevent the filter from plugging with wax and/or ice crystals.
  • Page 270 8.5.9.2 Change Engine Oil 1. Warm up the engine and then stop it by placing the START/RUN-OFF switch in the OFF position. 2. Ensure the unit will not start automatically by disabling the starter. 3. If available, install oil drain tool (CTD part number 68-15763-01) (Figure 8.12.)The Oil Drain Tool not only directs the oil over the door latch pin bracket and bottom panel on units so equipped, but also holds a typical...
  • Page 271 1. Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF position and disabling the starter. 2. Check all connections for mechanical tightness. Be sure filter outlet pipe is not fractured. 3. Release two clips on air cleaner housing and remove the cover. 4.
  • Page 272 Figure 8.14 Engine Control System 1, 2 1. Engine Preheater (EPH) 4. Fuel/Speed Actuator (FSA) 2. Engine Coolant Temperature Sensor 5. Engine Speed Sensor (ENSSN) (ENCT) (Behind Engine Preheater) 6. Engine Oil Pressure Switch (ENOPS) 3. Rack Position Sensor (RPS) 7.

  • Page 273: Cooling System

    If engine speed is not low enough to calibrate the sensor (1700 – 1780 RPM), the system will indicate that the load is too low for calibration. In this case you will have to manually increase the system load by slowly blocking the con- denser coil until the load is increased enough for the engine to reach calibration RPM, the calibration should com- plete successfully.
  • Page 274 4. Install hose or drain plug and fill system with clean, untreated water. NOTE Only clean water should be used to flush the cooling system. Do not use any radiator flush or deter- gents to clean the radiator. 5. Start the engine and drain system while warm. Rinse system three times after it has cooled down. Refill sys- tem with water.
  • Page 275 Figure 8.15 Radiator Assembly 1. Front Condenser Frame and Condenser 2. Gasket (Typical) 3. Radiator 4. Radiator Mounting Bracket 5. Radiator Mounting Bracket Bolts 6. Rear Condenser Frame 7. Rear Condenser Frame Mounting Bolts 8. Engine Drain Plug - - - - - 8–19 62-12169...
  • Page 276 8.5.15 Water Pump/Alternator Belt Figure 8.16 Water Pump/Alternator Belt The water pump/alternator belt is driven by a sheave on the engine crankshaft. Frayed, cracked or worn belts must be replaced. Adjustment is achieved by altering the position of the alternator. WARNING Beware of moving belts and belt-driven components.
  • Page 277 8.5.16 Crankcase Breather The engine uses a closed type breather with the breather line attached to the cylinder head cover (Figure 8.17). The breather assembly should be cleaned once a year or at every oil change interval (whichever comes first) (Table 8–1).
  • Page 278 The center line of all three sheaves must be in line. 9. Pivot idler to place tension on belt and set belt tension, using belt tension tool Carrier Transicold part num- ber 07-00203-00 or 07-00253-00, in accordance with the following chart. Tighten idler pivot and adjustment slide bolts.
  • Page 279 Figure 8.19 Upper Power Train 14. Armature Retaining Bolts and Washers 1. Condenser Fan 15. Key (Round End) 2. Clutch 16. Armature 3. Fanshaft 17. Rotor Retaining Nut 4. Upper Belt 18. Clutch Rotor 5. Upper Idler 19. Rotor Spacer 6.
  • Page 280 8.6.2 Upper Belt Replacement To remove and reinstall the upper belt, refer to Figure 8.19: 1. Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF position and removing the negative battery cable. 2. Loosen the Upper Idler pivot bolt and release tension. 3.
  • Page 281 Turn clockwise to remove. 3. Place the three pins of a spanner wrench (Carrier Transicold part number 07-00396-01) into the holes on the face of the armature. Place the tool handle between the fanshaft frame support and pod (10 o’clock posi- tion) to prevent rotation, then loosen and remove the armature retaining bolts and washers.
  • Page 282 11. If the gap is less than 0.015, remove enough shims to increase the gap to approximately 0.020 inch (0.25 mm). Shims (Carrier Transicold part number 50-00232-30) are 0.010 inch (0.25 mm) each. If the gap is more than 0.090 inch add enough shims to reduce the gap to approximately 0.020 inch.
  • Page 283 5. Remove the four fanshaft bolts and washers securing the fanshaft in place and remove shaft. 6. Check oil level in fanshaft. With the vent connection at the top, oil is to be at the level of the oil level plug located in the housing.
  • Page 284 Refrigerant System Service Service of refrigerant system equipment, refrigerant charge, leak checking and evacuation. Figure 8.22 Typical Refrigerant System Service Equipment 1. Vacuum Pump 2. Vacuum Indicator 3. Refrigerant Cylinder 4. Refrigerant Recovery Unit 5. Valve 6. Manifold Gauge Set 7.
  • Page 285 8.7.1 Refrigerant System Service Connections To service the refrigerant system, service equipment is connected at the compressor discharge service valve, com- pressor suction service valve and/or the liquid line service valve. When connecting to a valve, backseat the valve (turn counterclockwise) to close off gauge connection and attach service line to the valve.
  • Page 286 8.7.2.3 Removing Charge R-404A 1. Install a manifold gauge set to allow reading of suction and discharge pressure. Refer to Figure 8.22 Figure 8.23. WARNING Only a refrigerant cylinder containing R-404A should be connected to this refrigeration unit in order to pressurize the system. However, dry nitrogen may be used to increase pressure. Any other gas or vapor will contaminate the system and require additional removal and evacuation.
  • Page 287 Figure 8.24 Four Port Manifold Gauge Option 8.7.2.5 Unit Connection Figure 8.25 Unit Connection 8–31 62-12169...
  • Page 288 1. Connect the manifold gauge set to the unit (refer to Figure 8.25) • Hose A to low-pressure compressor service valve • Hose B to vacuum pump • Hose C to high-pressure compressor service valve • Hose D to high-pressure receiver king valve 2.
  • Page 289 8.7.2.6 Recovery System Installation Figure 8.26 Recovery System 1. Connect recovery machine to hose (B). 2. Place the R-452A recovery bottle onto the scale and note the weight. 3. Check the admissible charge indicated in the R-452A recovery bottle information. 4.
  • Page 290 10. Disconnect the recovery machine and dispose of the R-452A recovery bottle according to local regulation. End of recovery procedure Purge with Nitrogen. For more information about nitrogen instruction, refer to Carrier Transicold document #98-60068-00 (Brazing Instructions). 8.7.2.9 Pumping Down The Low Side Components on the low side of the refrigeration system (filter drier, EVXV, evaporator coil, CSMV, heat exchanger, suction line etc.) may be serviced or replaced without having to completely remove the refrigerant charge from the...
  • Page 291 8. Before opening up any part of the low side of the system, a slight positive pressure should be indicated on the pressure gauge. If the pressure is below 0 psig/ bar slowly open the liquid line service valve slightly and then frontseat the valve again.
  • Page 292 8.7.2.12 Adding a Complete Charge 1. Evacuate unit and leave in deep vacuum. Refer to Section 8.7.4. 2. Determine charge required for this unit (refer to the model/serial number nameplate or 2–1) and pro- Table cure a refrigerant cylinder with sufficient weight of refrigerant. Place cylinder on a scale and connect the charging line from cylinder to the liquid line service valve.
  • Page 293 8.7.3.2 Leak Checking a System without Charge The refrigeration system must be leak checked once it is closed and all repairs complete. 1. Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF position and disabling the starter.
  • Page 294 8.7.3.3 Leak Checking with Low Side Pumped Down The low side of the system must be leak checked once it is closed and all repairs complete. 1. Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF position and disabling the starterR-452A.
  • Page 295 8.7.3.4 Leak Checking Compressor The compressor and its associated switches, transducers, etc. must be leak checked once the compressor is closed and all repairs complete. 1. Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF position and disabling the starter.
  • Page 296 • Essential tools to properly evacuate any system include a good vacuum pump (5 cfm/8mH) volume displacement (Carrier Transicold part number 07-00176-11) and a good vacuum indicator such as a thermocouple vacuum gauge (micrometer). (Carrier Transicold part number 07-00414-00) •...
  • Page 297 8.7.4.2 Evacuation of the Low Side 1. Evacuate only after a low side leak check. Refer to Section 8.7.3 2. If possible, keep the temperature of the major components (condenser, evaporator, compressor and receiver) above 60°F (15.6°C) to speed evaporation of moisture. If the temperature is lower than 60°F (15.6°C), ice might form before moisture removal is complete.
  • Page 298 8.7.4.3 Evacuation of the Compressor 1. Evacuate only after a compressor leak check. Refer to Section 8.7.3. 2. Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF position and disabling the starter. 3. If possible keep the temperature of the compressor above 60°F (15.6°C) to speed evaporation of moisture. If the temperature is lower than 60°F (15.6°C), ice might form before moisture removal is complete.
  • Page 299 8.8.2 Removal and Replacement of Compressor 1. Pumpdown the compressor or remove charge. Refer to Section 8.7.2. 2. Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF position and removing the negative battery cable. 3.
  • Page 300 Figure 8.27 Compressor Torque 26 to 30 ft/lbs (35.3 to 40.7 Nm) Torque 30 ft/lbs (40.7 Nm) then, bend locking tabs against flat of bolt head Torque 26 to 30 ft/lbs (35.3 to 40.7 Nm) Torque 90 to 120 ft/lbs (122 to 163 Nm) 1.
  • Page 301 8.8.3 Cylinder Head and Valve Plate Service 1. Pumpdown the compressor. Refer to Section 8.7.2. 2. Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF position and removing the negative battery cable. WARNING Do not unscrew cylinder head mounting cap screws all the way before breaking seal. Entrapped pressure could result in injury.
  • Page 302 i. Inspect cylinder bores for excessive wear. Excessive wear for cylinder bores is defined as heavy and uneven scratches, gouges, or chipping of the internal wall of the cylinder, with a depth greater than 0.025 inch, which are caused by foreign objects, other than a normal reciprocating movement of the pistons and piston rings.
  • Page 303 Figure 8.30 Oil Pump and Bearing Head Assembly Figure 8.31 Oil Pump 1. Cap Screws 2. Cover 3. Eccentric Ring 4. Rotor 1. Oil Pump and Bearing Head 5. Idler 2. Thrust Washer 6. Shaft (Drive) 3. Oil Pickup Tube 7.
  • Page 304 An overcharge of compressor oil will reduce system capacity and possibly cause internal compressor damage. For this reason, Carrier Transicold re-manufactured compressors now contain a reduced oil charge to compensate for oil remaining in the system. A level slightly below the minimum mark is acceptable until the oil level can be checked using the following procedure: 1.
  • Page 305 Adding Oil with Compressor in System CAUTION Use only Carrier Transicold approved Polyol Ester Oil (POE). Buy quantities of one gallon or less. When using this hygroscopic oil, immediately reseal. Do not leave container of oil open or contamination will occur.
  • Page 306 8.8.5.5 Unloaders Unloader Checkout Procedure 1. Install a manifold gauge set on the compressor suction and discharge service valves and start unit in cooling with compartment temperature at least 5°F (2.8°C) above setpoint. The compressor will be fully loaded (both unloader coils de-energized). Note suction pressure. 2.
  • Page 307 5. Place a new gasket onto the replacement unloader valve body (with flat side toward the head) and, using unloader ring pliers, (Carrier Transicold part number 07-00223-00) compress the unloader ring while insert- ing the unloader into the compressor head.
  • Page 308 Refrigerant System Service 8.9.1 Evaporator Coil The use of recycled cardboard cartons is increasing across the country. The recycled cardboard cartons create much more fiber dust during transport than “new” cartons. The fiber dust and particles are drawn into the evapora- tor where they lodge between the coil fins.
  • Page 309 Unit uses either R-404A or R-452A refrigerant and POE oil. The use of inert gas brazing proce- dures is mandatory for all Carrier Transicold refrigeration units; otherwise compressor failure will occur. For more information, refer to Technical Procedure 98-50553-00 Inert Gas Brazing.
  • Page 310 Figure 8.34 Condenser/Radiator Assembly 1. Condenser/Radiator Assembly 7. Condenser Coil Mounting Brackets 2. Ambient Air Temperature Sensor (ATT) 8. Radiator 3. Front Condenser Frame 9. Rear Condenser Frame 4. Gasket (Typical) 10. Rear Condenser Frame Mounting Bolts 5. Radiator Mounting Brackets 11.
  • Page 311 8.9.4 Replacing Receiver Sight Glass Or Fusible Plug 1. Remove the refrigerant charge. Refer to Section 8.7.2. 2. Loosen the sight glass or fusible plug to relieve any remaining pressure. Remove and discard glass or plug. 3. Using new O-ring, install component. Torque the sight glass to 15 to 25 ft/lbs (20.3 to 33.9 Nm). Torque the fusible plug to 48 to 96 inch/lbs (5.4 to 10.8 Nm).
  • Page 312 8.9.5.1 Checkout Procedure To obtain proper heating and defrost, the normally open SV1 must energize and close tightly during the heat and defrost cycles. If the valve does not close tightly due to physical damage, foreign material or wear, refrigerant leak- age through the valve can reduce heating capacity.
  • Page 313 12. Reinstall the negative battery cable, start unit and run Pretrip to check operation. 8.9.6 Stepper Test Harness A stepper test harness (Carrier Transicold part number Figure 8.36 Stepper Test Harness 07-00515) is available for testing the compressor suction modulation valve (CSMV) and evaporator expansion valve (EVXV).
  • Page 314 The valve stepper motor may be tested using a stepper motor drive tester or ohmmeter. 1. To test with a stepper motor drive tester (Carrier Transicold part number 07-00375-00), connect the 4-pin test cable supplied with the tester to the valve connector, refer to 8.38, and the cable wires to the...
  • Page 315 8.9.7.4 Replacing Internal Motor/Piston Assembly 1. Pump down the low side. Refer to Section 8.7.2. 2. Remove internal motor/piston assembly and replace with a new assembly and gasket. The motor/piston assembly is set to 100% open when received from the warehouse. This is to ensure the Teflon valve seal is not damaged when it is installed.
  • Page 316 Figure 8.39 Evaporator Expansion Valve Coil Boot Coil Electronic Five Pin Expansion Connector Valve FLOW DIRECTION Strainer 8.9.8.1 Diagnostics - MSM or Wiring - Voltage Place the unit in component test mode and select EVXV. The EVXV will open and close for 10 minutes. During this time the voltage being sent to the EVXV can be measured.
  • Page 317 8.9.9.2 Diagnostics - Stepper Motor (EVXV) - Resistance The valve stepper motor may be tested using a stepper motor drive tester or ohmmeter. 1. To test with a stepper motor drive tester (Carrier Transicold part number 07-00375-00SV), connect the 5-pin test cable to the valve connector (Figure 8.40) and the cable wires to the tester in accordance with wire and...
  • Page 318 8.9.9.3 Diagnostics - Valve If the valve failed Pretrip and passed the preceding diagnostic testing, this is an indication that the valve internal mechanism is damaged and the piston and motor assembly is to be replaced. 1. To test the valve internal mechanism, install a manifold gauge set on the suction service valve and a stepper motor drive tester.
  • Page 319 Unit uses either R-404A or R-452A refrigerant and POE oil. The use of inert gas brazing procedures is mandatory for all Carrier Transicold refrigeration units; otherwise compressor failure will occur. For more information Refer to Technical Procedure 98-50553-00 Inert Gas Brazing.

  • Page 320: Pressure Transducers

    1. Ohmmeter or Continuity Device 2. Adjustment Screw (0.050” socket head size) 3. Low Side Connection 4. Pressure Line or Aspirator Bulb (Carrier Transicold part number 07-00177-01) 5. Magnehelic Gauge (Carrier Transicold part number 07-00177-00) 6. High Side Connection NOTE If the DTT temperature is above 40°F (4.4°C) defrost cannot be initiated and the Message- Center will...

  • Page 321: Electrical System Components

    7. Attach an ohmmeter to the air switch electrical contacts to check switch action. NOTE Use a hand aspirator (Carrier Transicold part number 07-00177-01), since blowing into tube by mouth may cause an incorrect reading. 8. With the gauge reading at zero, apply air pressure very slowly to the air switch. An ohmmeter will indicate continuity when switch actuates.
  • Page 322 8.9.15 Power Module (PM) 1. Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF position and removing the negative battery cable. 2. Open PM door. Loosen and remove stud-post terminal nuts (brass) at terminals BAT+. Refer to Figure 8.44, BAT–, ALT+ and EPH.
  • Page 323 8. A component legend sticker is to be located inside the PM door. Install the correct sticker (packaged with the replacement PM) for this unit inside the replacement PM. The replacement PM is populated at the factory with the standard fuses and relays. Additional fuses and relays may be required for this application (see Fig- 2.7) transfer the required fuses and relays from the original PM to the replacement PM as required.
  • Page 324 8.9.17.2 Brush Replacement 1. Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF position and removing the negative battery cable. 2. Remove screws holding the regulator/brush assembly. 3. Install new regulator/brush assembly. Torque mounting screws 35 to 40 inch/lbs (4 to 4.5 Nm). 4.
  • Page 325 8.9.18 Light Bar The light bar may be tested using a 12 VDC source. To Figure 8.46 Light Bar Connections test the light bar: 1. Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF Light Bar Side Control Box position and removing the negative battery...
  • Page 326 Table 8–3 Sensor Resistance Sensors AAT, RAT, SAT, ENCT, DTT, CST, EVOT, REMSN 1, 2 °F °C °F °C °F °C °F °C Ohms Ohms Ohms Ohms 336,500 -7.8 49,060 24.4 10,250 56.7 2,809 -38.9 312,600 -6.7 46,230 25.6 9,760 57.8 2,697 -37.8...
  • Page 327 Table 8–4 Sensor Resistance (CDT) °C °F °C °F °C °F °C °F Ohms Ohms Ohms Ohms 3,360,000 325,860 53,330 101.7 6,510 3,121,020 307,970 41.1 51,010 104.4 6,000 -37.8 2,900,710 291,180 42.2 48,800 107.2 5,540 -36.7 2,697,500 275,410 43.3 46,710 110.0 5,130 -35.6...
  • Page 328 Table 8–5 R-404A Temperature Pressure Chart Refer to the following tables for Temperature Pressure Charts for R-452A and R-404A refrigerants. Note that the liquid state pressure value and the vapor state pressure value of the R-452A refrigerant are different and more variable than those of the R-404A refrigerant Temperature Pressure Temperature...
  • Page 329 Table 8–6 R-452A Temperature Pressure Chart Temperature Liquid Vapor Temperature Liquid Vapor °F °C psig psig °F °C psig psig -29.2 10.4 0.72 0.45 144.6 9.97 128.6 8.87 -25.6 12.7 0.87 0.58 71.6 153.5 10.59 136.9 9.44 15.1 1.04 10.6 0.73 75.2 162.8...
  • Page 330 Table 8–7 Compressor Discharge Table 8–8 Compressor Suction Pressure Transducer Pressure/Voltage Pressure Transducer Pressure/Voltage PSIG Voltage PSIG Voltage -0.7 -5.0 -0.3 10.0 15.0 20.0 25.0 10.2 11.9 13.6 15.3 17.0 18.7 20.4 22.1 23.8 25.5 27.2 30.6 62-12169 8–74...

  • Page 331: Unit Troubleshooting

    SECTION 9 Unit Troubleshooting Under no circumstances should anyone attempt to repair sealed module internal components. Should a problem develop with these components, contact your nearest Carrier Transicold dealer for replacement. NOTE Run a Pretrip (Section 3.6) and check all active alarms before continuing with troubleshooting.
  • Page 332 Indication/Trouble Possible Causes Action / Reference 9.1.2 Engine Starts Then Stops Fuel supply restricted Check No fuel in tank Check Leak in fuel system Check Faulty fuel control operation Engine Manual Plugged fuel filter 8.5.5 Plugged inlet screen to mechanical pump 8.5.3 Plugged inlet screen to electric pump 8.5.4...
  • Page 333 Indication/Trouble Possible Causes Action / Reference 9.1.6 Miscellaneous Engine Troubleshooting Air cleaner or hose restricted 8.5.10 Air in fuel system 8.5.2 Air vent restricted in fuel tank cap Clean Restricted fuel lines Engine Manual Loss of power Defective fuel injection pump Engine Manual Defective injector(s) or incorrect type Engine Manual...
  • Page 334 Excessive charging rate (evi- Regulator faulty 8.9.17 denced by need for frequent filling or constant high charging amper- age) Alternator belt loose/broken/misaligned Figure 8.15 Alternator noisy Loose pulley 8.9.17 Worn bearings 8.9.17 Refrigeration / Temperature Control Indication/Trouble Possible Causes Action / Reference 9.3.1 Unit Will Not Cool Compressor drive defective...
  • Page 335 Indication/Trouble Possible Causes Action / Reference 9.3.5 Unit Will Not Terminate Cooling Temperature sensor malfunction 8.9.19 Unit fails to stop cooling Incorrect temperature scale, check whether microproces- Check sor is set for °C or °F 9.3.6 Unit Will Not Heat Or Has Insufficient Heating Abnormal pressure 9.3.9 Main microprocessor malfunction...
  • Page 336 Indication/Trouble Possible Causes Action / Reference 9.3.9 Abnormal Pressure Cooling Condenser coil dirty 8.9.2 Condenser fan/upper belt defective 8.6.3 High discharge pressure Discharge check valve restricted 8.9.9 Refrigerant overcharge or noncondensibles 8.7.2 Discharge service valve partially closed Open SV4 leaking 8.9.6 Compressor valve(s) worn or broken 8.8.1...
  • Page 337 Indication/Trouble Possible Causes Action / Reference 9.3.11 Abnormal Noise Loose mounting bolts Tighten Worn bearings 8.8.1 Compressor Worn or broken valves 8.8.1 Liquid slugging 9.3.13 Insufficient oil 8.8.5 Condenser fan 8.6.3 Condenser or evaporator fan Evaporator fan 8.6.5 Fan shaft 8.6.6 Alternator/Water pump belt Alternator belt loose/broken...
  • Page 338 62-12169 9–8...
  • Page 339 SECTION 10 Wiring 10.1 Harness Connector Wiring All illustrations provided in this Section are looking at the connector connection end (with the wires in the back). Table 10–1 PM Component Terminal Component Terminal UL2-A 1-MSM-10 SV4-A Not Used Not Used SP20 HPS-B SATPWR-A...
  • Page 340 Table 10–2 1MSM Component Terminal PM-24 2MSM-29 PM-12 SP00/DM-2 Not Used 2MSM-30 DM-10 SP01/DM-6 Not Used PM-1 DM-10 PM-23 Not Used Not Used 62-12169 10–2...
  • Page 341 Table 10–3 2MSM Component Terminal Component Terminal AFAR-A Not Used FHR-A CSMV-A LB-H CSMV-B LB-B CSMV-C PM-13 CSMV-D Not Used EVXV-E SP45 EVXV-A 1EVC-B EVXV-B DAS-B EVXV-C SP02 EVXV-D SP03 PM-25 1MSM-2 Not Used 1MSM-6 1EVC-H Not Used 1EVC-A Not Used 1EVC-C Not Used Not Used...
  • Page 342 Table 10–4 3MSM 3M M 3M M Component Terminal Component Terminal RRAT-A AAT-A 1EVC-G CST-A CDP-3 DTT-A SCP-3 2EVC-A EVOP-1 EVOT-A FLS-C Not Used AAT-B 1EVC-E CDT-B 1EVC-F DTT-B SP44 RAT-B Not Used EVOT-B EVOP-3 RRAT-B FLS-A 1EVC-D CDT-A CDP-1 CST-B CSP-1 RAT-A...
  • Page 343 Table 10–5 DM Table 10–6 ENCU ENCU Component Terminal 1MSM-11 SP00 SATCOM-B Component Terminal ENCT-B Not Used ENSSN-2 Not Used ENCT-A SP01 RPS-3 J1-A ENOPS-A SATCOM-C ENOPS-B Not Used PM-28 1MSM-11 ENSSN-1 SP24 Not Used SP02 SATCOM-A SP03 Not Used RPS-2 Not Used RPS-1...
  • Page 344 10.2 Splice Points Table 10–7 Splice Points Splice Point # Component Splice Point # Component PM-27 1MSM-4 SP-35 1RP-BG-A SP-00 DM-2 1RP-C TERM2-A 3MSM-9 1MSM-8 CDP-2 SP-44 SP-01 DM-6 CSP-2 TERM2-B EVOP-2 ENCU-23 2MSM-24 SP-02 2MSM-27 SP-45 AFAR-B ES-D FHR-B ENCU-24 FH-1 SP-03...
  • Page 345 10.3 Wiring Schematic The wiring schematic is provided on the following page. 10–7 62-12169...
  • Page 346 62-12169 10–8...
  • Page 347 LOW VOLTAGE INDEX 12-00843-00 NATT eSOLUTIONS OPTION FIELD INSTALLED SENSOR AND SWITCH OPTIONS eSolutions TEMP1 DP24-6 MODULE TEMP1 SPLICE POINT LOCATIONS SHEET 2 SENSOR GND DP24-22 HARNESS TEMP2 DP24-13 LOCATION LOCATION LOCATION ZONE ACRONYM DESCRIPTION CONNECTOR TEMP2 SP00 SP24 SP46 AMBIENT AIR TEMP SENSOR (22-04363 SP01...
  • Page 349 POWER MODULE 1-1MSM SP31 (GND) PM28 TO ENCU 19 HPS-A HPS-B J1-B J1-A SP35 BATT+ F1 (80A) F4 (7.5A) 1RPC 10 LPWR LPWR 7 PM15 CURRENT SP24 DM10 (LOGIC PWR) SENSOR ALT+ F3 (5A) 1 LGND LGND 11 BG12V (2A) PM18 1RP-BG SP35...
  • Page 351 1–7 62-11637...
  • Page 352 Central America and Mexico Carrier Transicold Carrier Transicold 700 Olympic Drive Ejercito Nacional 253-A Piso 5 Athens, GA 30601 USA Colonia Anahuac 11320 Mexico D.F. ©2021 Carrier Corporation. Printed in USA 10/21 Carrier, Carrier Transicold is a registered trademark of Carrier Corporation.

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