Service manual

ManualsBrandsCarrier ManualsRefrigerator69NT40-511-199

T−340 Rev D

OPERATION AND SERVICE

for

69NT40-561-001 to 199

Container Refrigeration Units

Container Refrigeration

Summary of content (136 pages)

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Container Refrigeration OPERATION AND SERVICE for 69NT40-561-001 to 199 Container Refrigeration Units T−340 Rev D
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OPERATION AND SERVICE MANUAL CONTAINER REFRIGERATION UNIT Models 69NT40−561−001 to 199 ©Carrier Corporation, 2012 Printed in U. S. A.
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TABLE OF CONTENTS PARAGRAPH NUMBER Page INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 1.3 CONFIGURATION IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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TABLE OF CONTENTS (Continued) PARAGRAPH NUMBER Page DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2−1 2−1 2.1.1 Refrigeration Unit − Front Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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TABLE OF CONTENTS (Continued) PARAGRAPH NUMBER Page 3.3.18 Frozen Economy Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3−8 3.3.19 Frozen Mode Cooling - Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3−8 3.3.20 Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3−9 3.3.
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TABLE OF CONTENTS (Continued) PARAGRAPH NUMBER 4.4 Page eAutoFresh OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4−3 4.4.1 eAutoFresh Pre−Trip Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4−3 4.4.2 eAutoFresh Start−Up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4−3 4.4.
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TABLE OF CONTENTS (Continued) PARAGRAPH NUMBER 6.5 6.6 Page REFRIGERANT LEAK CHECKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EVACUATION AND DEHYDRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6−3 6−3 6.6.1 6.6.2 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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TABLE OF CONTENTS (Continued) PARAGRAPH NUMBER Page 6.24 TEMPERATURE SENSOR SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6−19 6.24.1 Sensor Checkout Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6−19 6.24.2 Sensor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6−22 6.24.
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LIST OF ILLUSTRATIONS (Continued) FIGURE NUMBER Page Figure 4−3 Diagram of Emergency Bypass Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4−8 Figure 6−1 Manifold Gauge Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6−1 Figure 6−2 R-134a Manifold Gauge/Hose Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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LIST OF TABLES TABLE NUMBER Page Table 2−1 Safety and Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 3−1 Keypad Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2−9 3−2 Table 3−2 DataCORDER Configuration Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SAFETY SUMMARY SPECIFIC WARNING AND CAUTION STATEMENTS GENERAL SAFETY NOTICES The following general safety notices supplement specific warnings and cautions appearing elsewhere in this manual. They are recommended precautions that must be understood and applied during operation and maintenance of the equipment covered herein. The general safety notices are presented in the following three sections labeled: First Aid, Operating Precautions and Maintenance Precautions.
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WARNING CAUTION Make sure power to the unit is OFF and power plug disconnected before replacing the compressor. Charge water−cooled condenser or receiver according to nameplate specifications to ensure optimal unit performance. WARNING CAUTION Before disassembly of the compressor, be sure to relieve the internal pressure very carefully by slightly loosening the couplings to break the seal.
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CAUTION CAUTION The scroll compressor achieves low suction pressure very quickly. Do not use the compressor to evacuate the system below 0 psig. Never operate the compressor with the suction or discharge service valves closed (frontseated). Internal damage will result from operating the compressor in a deep vacuum. When a failure occurs during automatic testing, the unit will suspend operation awaiting operator intervention.
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SECTION 1 INTRODUCTION 1.1 INTRODUCTION 1.3.4 Compressor The unit is fitted with a scroll compressor equipped with suction and discharge service connections. 1.3.5 Condenser Coil The Carrier Transicold model 69NT40−561−001 to 199 series units are of lightweight aluminum frame construction, designed to fit in the front of a container and serve as the container’s front wall. The unit is fitted with a four−row condenser coil using 7mm tubing.
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1.4.6 Quest − CCPC 1.4.15 460 Volt Cable Various power cable and plug designs are available for the main 460 volt supply. The plug options tailor the cables to each customer’s requirements. Compressor−Cycle Perishable Cooling (CCPC) is a method of temperature control used during steady−state perishable cooling that cycles the compressor on and off according to supply / return air temperature conditions. 1.4.
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SECTION 2 DESCRIPTION 2.1 GENERAL DESCRIPTION 2.1.2 Fresh Air Makeup Vent The function of the upper or lower makeup air vent is to provide ventilation for commodities that require fresh air circulation. A manually operated venting system is located in the upper left access panel. The optional eAutoFresh vent system is to moderate the atmospheric level in the container in response to cargo respiration. When transporting frozen cargo loads the vent will be closed.
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If the unit is equipped with eAutoFresh, system components are mounted in addition to the standard refrigeration unit components. The stepper motor component is installed in the vent; the air filter, CO2 sensor, stepper motor drive and CO2 sensing lines are installed on the rib of the upper grill. 2.1.
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2.1.4 Compressor Section pressure transducer (EPT) and the suction pressure transducer (SPT). The compressor section includes the compressor, digital unloader valve (DUV), high pressure switch, discharge pressure transducer (DPT), evaporator The supply temperature sensor, supply recorder sensor and ambient sensor are located to the left of the compressor. 16 11 2 1 3 10 12 9 13 8 14 4 5 6 15 7 1. 2. 3. 4. 5. 6. 7. 8.
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solenoid valve (ESV), and sight glass/moisture indicator. 2.1.5 Air−Cooled Condenser Section The air−cooled condenser section (Figure 2−4) consists of the condenser fan, condenser coil, receiver, liquid line service valve, filter drier, fusible plug, economizer, economizer expansion valve, economizer 2 The condenser fan pulls air through the bottom of the coil and discharges it horizontally through the condenser fan grille. 4 3 1 5 6 8 9 10 7 16 11 12 15 13 14 1. 2. 3. 4. 5. 6. 7. 8.
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economizer solenoid valve (ESV), and moisture/liquid indicator. 2.1.6 Water−Cooled Condenser Section The water−cooled condenser section (Figure 2−5) consists of a water−cooled condenser, sight glass, rupture disc, filter drier, water couplings, water pressure switch, economizer, economizer expansion valve, 2 The water−cooled condenser replaces the standard unit receiver. 3 4 5 1 6 7 12 1. 2. 3. 4. 5. 6.
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2.1.8 Communications Interface Module The communications interface module is a slave module which allows communication between the refrigeration unit and a ship system master central monitoring station. The module will respond to communication, and return information over the ships main power line. Refer to the master system technical manual for further information. 2.1.
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2.2 REFRIGERATION SYSTEM DATA a. b. c. d. e. Model Number Weight (With Oil) Compressor/Motor Assembly Approved Oil Oil Charge Verify at −18 C Electronic Expansion Valve (0F) container box Superheat (Evaporator) temperature Verify at −18 C Economizer Expansion (0F) container box Valve Superheat temperature Opens Heater Termination Thermostat Closes Cut−Out High Pressure Switch Cut−In ZMD26KVE−TFD−272 42.9 kg (95 lb) Uniqema Emkarate RL−32−3MAF 1774 ml (60 ounces) 4.4 to 6.7 C (8 to 12 F) 4.4 to 11.
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2.3 ELECTRICAL DATA CB−1 (25 amp) CB−2 (50 amp) a. Circuit Breaker CB−2 (70 amp) b. Compressor Full Load Amps (FLA) Motor c. Condenser Motor d. Evaporator Heaters e. Evaporator Motor(s) f. g. h. i.
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Section 2.3 − ELECTRICAL DATA−CONTINUED Orange wire Power Red wire Output Brown wire Ground Input voltage 5 VDC Output voltage 0 to 3.3 VDC l. Humidity Sensor Output voltage readings verses relative humidity (RH) percentage: 30% 0.99 V 50% 1.65 V 70% 2.31 V 90% 2.97 V 2.4 SAFETY AND PROTECTIVE DEVICES Unit components are protected from damage by safety and protective devices listed in Table 2−1.
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During the standard mode of operation, the normally closed digital unloader valve (DUV) controls the system refrigerant flow and capacity by loading and unloading the compressor in frequent discrete time intervals. If the system capacity has been decreased to the lowest allowable capacity with the DUV, the unit will enter a trim heat mode of operation, during which the controller will pulse the evaporator heaters in sequence with the compressor digital signal in order to absorb the excess capacity. 2.
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STANDARD OPERATION WITH RECEIVER COMBO ETS1 AND 2 EVAPORATOR ELECTRONIC EXPANSION VALVE CONDENSER DIGITAL UNLOADER VALVE ECON.
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ELECTRONIC EXPANSION VALVE ECON.
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SECTION 3 MICROPROCESSOR The DataCORDER software functions to record unit operating parameters and cargo temperature parameters for future retrieval. Coverage of the temperature control software begins with paragraph 3.2. Coverage of the DataCORDER software is provided in paragraph 3.8. The keypad and display module serve to provide user access and readouts for both of the controller functions, temperature control and DataCORDER.
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3.1.1 Keypad Table 3−1 Keypad Function KEY The Keypad (Figure 3−2) is mounted on the right-hand side of the control box. The keypad consists of eleven push button switches that act as the user’s interface with the controller. Descriptions of the switch functions are provided in Table 3−1. CODE SELECT Accesses function codes. PRE TRIP Displays Pre-trip selection menu. Discontinues Pre-trip in progress. ALARM LIST Displays alarm list and clears the alarm queue.
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3.2 CONTROLLER SOFTWARE COOL HEAT DEFROST IN RANGE ALARM SETPOINT/Code The controller software is a custom designed program that is subdivided into configuration software and operational software. The controller software performs the following functions: SUPPLY RETURN a. Control supply or return air temperature to required limits, provide modulated refrigeration operation, economized operation, unloaded operation, electric heat control, and defrost.
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The compressor will start for 1 second, then pause for five seconds. This sequence will be repeated two more times. After the final bump start the unit will pre-position the EEV to the correct starting position, pause and start up. 3.2.2 Operational Software (Cd Function Codes) The operational software is the actual operation programming of the controller which activates or deactivates components in accordance with current unit operating conditions and selected modes of operation. 3.3.
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Pull Down Perishable Mode (Only Applicable to Perishable Mode) Controller Set Point ABOVE −10°C (+14°F), or−5°C (+23°F) optionally Controller Set Point ABOVE −10°C (+14°F), or−5°C (+23°F) optionally +2.5°C (+4.5°F) Cooling, Unloaded ÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍ −.20°C Air Circulation Cooling, Economized +.20°C −.20°C −.50°C −.20°C −.50°C Heating Falling Temperature Cooling, Unloaded ÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍ Air Circulation Set Point −.
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Two timers are activated during dehumidification to prevent rapid cycling and consequent contactor wear: In order to initiate economy fan mode, a perishable set point must be selected prior to activation. When economy fan mode is active, the evaporator fans will be controlled as follows: At the start of each cooling or heating cycle, the evaporator fans will run in high speed for three minutes. They will then be switched to low speed any time the supply air temperature is within +/- 0.2 C (0.
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e. When the supply air temperature has fallen to within 1.9 C (3.4 F) of set point temperature and the average capacity of the system has fallen below 70%, the unit will open contacts TS to close the ESV and take the unit out of economized operation. ENERGIZED DE-ENERGIZED ST F TC HPS f. The controller continuously monitors supply air temperature. Once the supply air temperature falls below set point, the controller periodically records supply air temperature, set point and time.
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Frozen Mode Controller Set Point at or BELOW −10°C (+14°F), or −5°C (+23°F) optionally +2.5°C (+4.5°F) Cooling, Economized −.20°C ÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍ Falling Rising +.20°C Set Point Air Circulation Temperature Temperature Figure 3−8 Controller Operation - Frozen Mode 3.3.19 Frozen Mode Operation 3.3.
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f. When the return air temperature increases to 0.2 C (0.4 F) above set point and three minutes have elapsed, the EEV opens and contacts TC, TS and TN close to restart the compressor, open the ESV and restart the condenser fan motor. The white COOL is illuminated. 3.3.
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3. During Pretrip, defrost may occur during tests P-8, and P-10. Defrost is forced during Pretrip test P-9. When defrost is initiated, the controller closes the EEV, opens contacts TC, TN and TE (or TV) to de-energize the compressor, condenser fan and evaporator fans. The white COOL light is also de-energized. The controller then closes contacts TH to supply power to the heaters, and the orange DEFROST light is illuminated.
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When the return air temperature falls to 7 C (45 F), the controller ensures that the defrost temperature sensor (DTS) reading has dropped to 10 C or below. If it has not it indicates a failed DTS, a DTS failure alarm is triggered and the defrost mode is operated by the return temperature sensor (RTS). 3.4.4 Compressor High Pressure Protection Temperature, Low The controller continuously monitors compressor discharge pressure and temperature, and suction pressure.
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c. The left display will show “AL##,” where ## is the alarm number sequentially in the queue. 3.5 QUEST − CCPC Compressor-Cycle Perishable Cooling (CCPC) is a method of temperature control used during steady-state perishable cooling that cycles the compressor on and off according to return air temperature. d. The right display will show the actual alarm code. “AA##” will display for an active alarm, where “##” is the alarm code. Or “IA##” will display for an inactive alarm, see Table 3−6.
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3.8 DataCORDER 3.8.1 Description Supply Air Temperature Real Time Clock Battery (Internal) Replacement Carrier Transicold “DataCORDER” software is integrated into the controller and serves to eliminate the temperature recorder and paper chart. DataCORDER functions may be accessed by keypad selections and viewed on the display module. The unit is also fitted with interrogation connections (see Figure 3−1) which may be used with the Carrier Transicold DataReader to download data.
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8. Main voltage 3.8.3 Sensor Configuration (dCF02) Two modes of operation may be configured, the Standard Mode and the Generic Mode. a. Standard Mode In the standard mode, the user may configure the DataCORDER to record data using one of seven standard configurations. The seven standard configuration variables, with their descriptions, are listed in Table 3−3.
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Raw Data Report for ABC1234567 May 31, 2007 to Jun 04, 2007 System Configuration at the Time of Interrogation: Interrogated On May 05, 2007 Extracted by DataLINE Rev 1.0.0 Controller Software: 5327 Controller Serial #: 04163552 Bill of Lading #: 1 Origin: Origin Date: Destination: Discharge Date: Comment: DataLINE Tool Probe Calibration Readings: USDA1: 0.0 USDA2: 0.0 USDA3: 0.0 Cargo: 0.
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2. Controller DC battery pack power: If a battery pack is installed, the DataCORDER will power up for communication when an interrogation cable is plugged into an interrogation receptacle. Table 3−3 DataCORDER Standard Configurations Standard Config.
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With a communications interface module installed, all functions and selectable features that are accessible at the unit may be performed at the master station. Retrieval of all DataCORDER reports may also be performed. Refer to the master system technical manual for further information. a. DataReader The Carrier Transicold Data Reader (see Figure 3−12) is a simple to operate handheld device designed to extract data from the DataCORDER and upload it to a PC.
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Sensor 1 Sensor 2 Sensor 3 e. If no alarms are active, the alarm queue may be cleared. The exception to this rule is the DataCORDER alarm queue Full alarm (AL91), which does not have to be inactive in order to clear the alarm list. To clear the alarm list: Place in pulp of the product located next to the return air intake. Place in pulp of the product five feet from the end of the load for 40 foot containers, or three feet from the end of the load for 20 foot containers.
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3.
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3.10 CONTROLLER FUNCTION CODES Table 3−5 Controller Function Codes (Sheet 1 of 8) Code No. TITLE DESCRIPTION Note: If the function is not applicable, the display will read “‐‐‐‐‐” Display Only Functions − Cd01 through Cd26 are display only functions. Display Only Functions Digital Unloader Cd01 Valve Closed (%) Displays the DUV percent closed. The right display reads 100% when the valve is fully closed. The valve will usually be at 10% on start up of the unit except in very high ambient temperatures.
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Table 3−5 Controller Function Codes (Sheet 2 of 8) Cd21 Capacity Mode The mode of operation is displayed (Unloaded - Standard - Economized). Cd22 Compressor State The status of the compressor is displayed (OFF, On). Cd23 Evaporator Fan Displays the current evaporator fan state (OFF, LOW, HIGH). Compressor Run Cd25 Time Remaining Until Defrost This code displays the time remaining until the unit goes into defrost (in tenths of an hour).
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Table 3−5 Controller Function Codes (Sheet 3 of 8) The stagger start offset time is the amount of time that the unit will delay at start-up, thus allowing multiple units to stagger their control initiation when all units are powered up together. The eight possible offset values are 0 (Factory Default), 3, 6, 9, 12, 15, 18 or 21 seconds. The current limit is the maximum current draw allowed on any phase at any time. Limiting the unit’s current reduces the load on the main power supply.
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Table 3−5 Controller Function Codes (Sheet 4 of 8) Container Cd40 Identification Number If a valid container id exists, the default display for Cd40 will be “cd40_XXXXX” where “XXXXX” is the 5th character through the 9th character of the container id. Pressing the Enter key on Cd40 will display “id_YYYYYYY” where “YYYYYYY” is the 5th character to the 11th character of the container id.
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Table 3−5 Controller Function Codes (Sheet 5 of 8) Selects the airflow units to be displayed by Cd45 if configured for Vent Position Sensor or displayed by “USER/FLO” under Cd43 if configured for Autoslide. CF= Cubic Feet per Minute Cd46 Airflow Display Units CM=Cubic Meters per Hour bOth=Displays CF or CM depending on the setting of Cd28 (Metric/Imperial) or the pressing of the degree C/F key.
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Table 3−5 Controller Function Codes (Sheet 6 of 8) Configurable Functions − Cd50 through Cd53 are user-selectable functions. The operator can change the value of these functions to meet the operational needs of the container. Cd50 CCPC Disabled Automatic Cold Cd51 Treatment Parameter Selection ”OFF” = disabled. ”On” = enabled. ”SEtPt” = suspended by setpoint too low. ”CAHUM” = suspended by CA or humidity control. ”ACt” = suspended by ACT active. ”FAIL” = all return temperature probe failure for CCPC.
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Table 3−5 Controller Function Codes (Sheet 7 of 8) Automatic Set point Cd53 Change Mode Parameter Selection ASC-mode: Cd53 increments of (1 day)_(1hr), Display: default “0_0 “ “done” mm-dd this will be display is ASC has completed “ASC” value “On” “OFF” Display /Select: default “OFF“ “nSC” value “1 - 6“ (This is the value “n” for the subsequent entries). “SP (n-1)” value C / F on 0.1 degree increments Display/Select: default “10.
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Table 3−5 Controller Function Codes (Sheet 8 of 8) Configurable Functions − Cd59 through Cd61 are user-selectable functions. The operator can change the value of these functions to meet the operational needs of the container. Cd59 allows operation of the pump down logic control. The display will flash between “STArT PdN” and “PrESS EnTEr”. Upon entering Cd59 the operator will be required to acknowledge that they want to initiate the pump down control.
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Start Troubleshooting Unit does self test? No Check Power Supply Refer to CONNECT POWER Section 4.2 No Check Power Supply Refer to CONNECT POWER Section 4.2 No Install Latest Software Revision Refer to CONTROLLER SOFTWARE Section 3.2 No Load correct unit configuration Refer to Configuration Software (Variables) Section 3.2.
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3.11 CONTROLLER ALARM INDICATIONS Alarm Code AL03 Loss of Superheat Control Table 3−6 Controller Alarm Indications (Sheet 1 of 8) Cause Components Troubleshooting Superheat has Electronic Check the operation of the remained below Expansion Valve EEV using Cd41. 1.66 C (3 F) degrees (EEV) for five minutes Evaporator Verify accuracy of continuously while Temperature temperature sensors, refer compressor running. Sensor(s) ETS & to Sensor Checkout Compressor drawing ETS1. Procedure Section 6.24. more than 2.
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Table 3−6 Controller Alarm Indications (Sheet 2 of 8) Alarm Code AL16 Compressor Current High Cause Components Compressor current Current Sensor draw is over the calculated maximum for 10 minutes. Amperage is indeed too high. Operating Conditions Make sure system Check air flow of pressures are relevant to condenser. operating conditions. Check Refrigerant charge, refer to REFRIGERATION SYSTEM SERVICE Section 6.
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Table 3−6 Controller Alarm Indications (Sheet 3 of 8) Alarm Code Cause AL18 Discharge pressure is over the maximum for Discharge Pressure High 10 minutes within the last hour. AL19 Discharge Temperature High AL20 Control Contactor Fuse (F3) Components Restrictions in the refrigeration system. Filter Drier Troubleshooting Corrective Actions Ensure Liquid Line Service Open Liquid Line SerValve is fully open. vice Valve as needed.
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Table 3−6 Controller Alarm Indications (Sheet 4 of 8) Alarm Code Cause Components AL21 One of the 18 VAC System Sensors Control Circuit controller fuses Fuse (F1/F2) (F1/F2) is open. Refer Wiring to Cd08. Controller Corrective Actions Replace defective sensor(s) Repair as needed. Replace controller, refer to Controller Service Section 6.23. Shut down unit, disconnect Replace defective power, & check Evaporator evaporator fan motor, Motor IP at plug connection refer to EVAPORATOR pins 4 & 6.
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Table 3−6 Controller Alarm Indications (Sheet 5 of 8) Alarm Code AL28 Low Suction Pressure Cause Suction pressure too low for normal operation. Components N/A Suction Pressure Transducer (SPT) Discharge Pressure Transducer (DPT) Alarm LED will be activated and user intervention is required. Troubleshooting Power cycle the unit. Corrective Actions Resetting the unit may correct problem, monitor the unit. Confirm accurate SPT Replace SPT if pressure readings, refer to defective.
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Table 3−6 Controller Alarm Indications (Sheet 6 of 8) Alarm Code Cause AL56 Invalid Return Temperature Sensor Primary Return Sensor (RTS) reading. (RTS) Components Return Temperature Sensor (RTS) Troubleshooting Perform Pre-trip P5: Invalid Ambient Temperature Sensor (AMBS) reading. Ambient Temperature Sensor (AMBS) Test the AMBS, refer to Sensor Checkout Procedure Section 6.24.1.
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Table 3−6 Controller Alarm Indications (Sheet 7 of 8) Alarm Code AL65 Discharge Pressure Transducer (DPT) Cause Components Compressor Compressor Discharge Transducer Discharge is out of range. Transducer (DPT) AL66 Suction Pressure Suction Pressure (SPT) Suction Transducer (SPT) out Transducer (SPT) of range. Pressure Transducer, (EPT) Evaporator Pressure Transducer AL67 Humidity Sensor Humidity Sensor (HS) reading out of range.
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Table 3−6 Controller Alarm Indications (Sheet 8 of 8) NOTE If the controller is configured for four probes without a DataCORDER, the DataCORDER alarms AL70 and AL71 will be processed as Controller alarms AL70 and AL71. Refer to Table 3−10, page 3−45. The controller performs self-check routines. If an internal failure occurs, an “ERR” alarm will appear on the display. This is an indication the controller needs to be replaced.
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3.12 CONTROLLER PRE−TRIP TEST CODES Table 3−7 Controller Pre-trip Test Codes (Sheet 1 of 6) NOTE “Auto” or “Auto1” menu includes the: P0, P1, P2, P3, P4, P5, P6 and rSLts. “Auto2” menu includes P0, P1, P2, P3, P4, P5, P6, P7, P8, P9, P10 and rSLts. “Auto3” menu includes P0, P1, P2, P3, P4, P5, P6, P7 and P8.
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Table 3−7 Controller Pre-trip Test Codes (Sheet 2 of 6) P4 Tests - High Speed Evaporator Fans Current Draw: High speed evaporator fans are turned on, then off. Current draw must fall within specified range and measured current changes must exceed specified ratios. No other system components will change state during this test. NOTE If unit configured for single evaporator fan operation and either AL11 or AL12 is active at the start of either test, the test will fail immediately.
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Table 3−7 Controller Pre-trip Test Codes (Sheet 3 of 6) P5-7 P5-8 P5-9 Primary .vs Secondary Evaporator Temperature Sensor Test Primary Evaporator Pressure Transducer Test Suction (Evaporator) Pressure Transducer Test This is a Pass/Fail test of the primary evaporator temperature sensor (ETS1) and secondary evaporator temperature sensor (ETS2). Test passes if secondary evaporator temperature sensor (ETS2) is within +/- 0.5 C of the primary evaporator temperature sensor (ETS1).
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Table 3−7 Controller Pre-trip Test Codes (Sheet 4 of 6) NOTE P6-6 through P6-10 are conducted by changing status of each valve and comparing suction pressure change and/or compressor current change with predetermined values. Tests will cause compressor and condenser fans to cycle on and off as needed to generate the pressure required for individual Pre-trip sub tests. The compressor will start in order to build discharge pressure, followed by compressor pump down sequence.
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Table 3−7 Controller Pre-trip Test Codes (Sheet 5 of 6) P8 Tests - Perishable Mode Tests: Pretrip tests P7-0 and P7-1 must have passed or have been skipped for these tests to execute. P8-0 Perishable Mode Test P8-1 Perishable Mode Pull Down Test / eAutofresh CO2 Sensor Calibration P8-2 Perishable Mode Maintain Temperature Test If the control temperature is below 15.6 C., the setpoint is changed to 15.6 C., and a 180 Minute timer is started.
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Table 3−7 Controller Pre-trip Test Codes (Sheet 6 of 6) P9 Test - DTT Close and Open Test: The DTT in this control is not a physical device, with actual metallic contacts, it is a software function that acts similar to a thermostat. Using various temperature inputs, the DTT function determines whether a thermostat mounted on the Evaporator Coil would have OPEN or CLOSED contacts. Primarily, the DTT function operates based on the temperature reading from the Defrost Termination Sensor.
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Table 3−8 DataCORDER Function Code Assignments NOTE Inapplicable Functions Display “‐‐‐‐‐” To Access: Press ALT. MODE key Code No. TITLE DESCRIPTION dC1 Recorder Supply Temperature Current reading of the supply recorder sensor. dC2 Recorder Return Temperature Current reading of the return recorder sensor. dC3-5 USDA 1,2,3 TemperCurrent readings of the three USDA probes. atures dC6-13 Network Data Points 1-8 Current values of the network data points (as configured).
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Table 3−9 DataCORDER Pre-trip Result Records Test No.
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Table 3−10 DataCORDER Alarm Indications Code No. dAL70 dAL71 TITLE Recorder Supply Temperature Out of Range Recorder Return Temperature Out of Range To Access: Press ALT. MODE key DESCRIPTION The supply recorder sensor reading is outside of the range of -50 C to 70 C (-58 F to +158 F), or the probe check logic has determined there is a fault with this sensor. NOTE The P5 Pre-trip test must be run to inactivate the alarm.
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SECTION 4 OPERATION 4.2.1 Connection To 380/460 VAC Power 1. Make sure start−stop switch (ST on control panel) and circuit breaker (CB−1 in the control box) are in position “0” (OFF). 2. Plug the 460 VAC (yellow) cable into a de−energized 380/460 VAC, 3−phase power source. Energize the power source. Place circuit breaker (CB−1) in position “I” (ON). Close and secure control box door. 4.2.
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4.3.1 Upper Fresh Air Makeup Vent Two slots and a stop are designed into the Upper Fresh Air disc for air flow adjustments. The first slot allows for a 0 to 30% air flow; the second slot allows for a 30 to 100% air flow. To adjust the percentage of air flow, loosen the wing nut and rotate the disc until the desired percentage of air flow matches with the arrow. Tighten the wing nut. 4.3.2 Lower Fresh Air Makeup Vent a.
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Upon initiation of Pre−Trip P0, the current state will be saved and the vent will fully close. This will be followed by two sequences of opening to 100% and returning to the closed position. No other eAutoFresh mode of operation will be available until the two cycles of opening and closing have completed. Upon termination of the test, the vent will open to the previous state and operation will return to the previous mode. 4.3.
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CAL will attempt to calibrate the CO2 sensor. When “CAL“ is selected the display will flash “CAL“. The operator is to hold the “ENTER“ key for 5 seconds. The display will stop flashing and read “CAL“ for 5 seconds. The microprocessor will read the CO2 value, and then compare that value to a known zero value. If the sensor is within the calibration parameter range, the microprocessor will determine the appropriate offset for the sensor.
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4.5.2 Water−Cooled Condenser with Condenser Fan Switch 4.7.1 Starting the Unit a. With power properly applied, the fresh air vent position set and (if required) the water−cooled condenser connected (refer to paragraphs 4.2, 4.3 & 4.5), place the START−STOP switch to “I” (ON), see Figure 2−6. a. Connect the water supply line to the inlet side of condenser and the discharge line to the outlet side of the condenser. (See Figure 2−5.) b. Maintain a flow rate of 11 to 26 lpm (3 to 7 gpm). b.
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3. Pre−trip may also be initiated via communications. The operation is the same as for the keypad initiation described below except that should a test fail, the Pre−trip mode will automatically terminate. When initiated via communications, a Pre−trip test may not be interrupted with an arrow key, but the Pre−trip test can be terminated with the PRE−TRIP key. 4.9 PRE−TRIP DIAGNOSIS CAUTION Pre−trip inspection should not be performed with critical temperature cargoes in the container. a.
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c. TO RUN AN INDIVIDUAL TEST: Scroll through the selections by pressing the UP ARROW or DOWN ARROW keys to display an individual test code. Pressing ENTER when the desired test code is displayed. The probe check procedure consists of running the evaporator fans for up to eight minutes in order to compare the readings from the adjacent temperature probes. If a significant difference in temperature readings is detected between probes, a defrost cycle, followed by another probe check may be initiated.
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4.11 EMERGENCY BYPASS OPERATION When the Emergency Bypass switch is in the Bypass position, the EBS will be enabled. With the Mode switch in Full Cool mode, the following will occur simultaneously: Emergency Bypass operation is used to override the controller, in the case of a controller malfunction, to keep the unit cooling. When Emergency Bypass is installed and turned on, the unit will remain in a continuous state of full cool until the Emergency Bypass switch is turned off. a.
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SECTION 5 TROUBLESHOOTING CONDITION POSSIBLE CAUSE REMEDY/ REFERENCE SECTION 5.
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CONDITION POSSIBLE CAUSE REMEDY/ REFERENCE SECTION 5.3 UNIT RUNS BUT HAS INSUFFICIENT COOLING Refrigeration system Abnormal pressures Abnormal temperatures Abnormal currents Controller malfunction Evaporator fan or motor defective Compressor service valves or liquid line shutoff valve partially closed 5.7 5.16 5.17 5.9 6.15 Open valves completely Frost on coil Digital unloader valve stuck open Electronic expansion valve 5.10 Replace Replace 5.
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CONDITION POSSIBLE CAUSE REMEDY/ REFERENCE SECTION 5.6 UNIT WILL NOT DEFROST PROPERLY (Continued) Initiates but does not defrost Frequent defrost Heater contactor or coil defective Heater(s) burned out Wet load Replace 6.
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CONDITION POSSIBLE CAUSE REMEDY/ REFERENCE SECTION 5.10 NO EVAPORATOR AIR FLOW OR RESTRICTED AIR FLOW Frost on coil Dirty coil Evaporator fan motor internal protector open Evaporator fan motor(s) defective No or partial evaporator air flow Evaporator fan(s) loose or defective Evaporator fan contactor defective 5.
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CONDITION POSSIBLE CAUSE REMEDY/ REFERENCE SECTION 5.13 AUTOTRANSFORMER MALFUNCTION Unit will not start Circuit breaker (CB−1 or CB−2) tripped Autotransformer defective Power source not turned ON 460 VAC power plug is not inserted into the receptacle Check 6.22 Check 4.2.2 5.14 WATER−COOLED CONDENSER OR WATER PRESSURE SWITCH High discharge pressure Condenser fan starts and stops Dirty coil Noncondensibles Water pressure switch malfunction Water supply interruption 6.12 Check Check 5.
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SECTION 6 SERVICE NOTE Use a refrigerant recovery system whenever removing refrigerant. When working with refrigerants you must comply with all local government environmental laws. In the U.S.A., refer to EPA section 608. When both valves are backseated (all the way out), high pressure vapor will flow into the low side. When the Suction Pressure Valve (1) is open and the Discharge Pressure Valve (4) shut, the system can be charged through the Utility Connection (6). Oil can also be added to the system.
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6.3 SERVICE CONNECTIONS CAUTION The compressor suction, compressor discharge, and the liquid line service valves (see Figure 6−3) are provided with a double seat and an access valve which enables servicing of the compressor and refrigerant lines. To prevent trapping liquid refrigerant in the manifold gauge set be sure set is brought to suction pressure before disconnecting.
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h. After repairs have been made, be sure to perform a refrigerant leak check (refer to Section 6.5), and evacuate and dehydrate the low side (refer to paragraph 6.6.1). c. If possible, keep the ambient temperature above 15.6 C (60 F) to speed evaporation of moisture. If the ambient temperature is lower than 15.6 C (60 F), ice might form before moisture removal is complete. Heat lamps or alternate sources of heat may be used to raise the system temperature. i. Check refrigerant charge (refer to Section 6.
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c. Test the evacuation setup for leaks by backseating the unit service valves and drawing a deep vacuum with the vacuum pump and gauge valves open. Shut off the pump and check to see if the vacuum holds. Repair leaks if necessary. 6.7.1 Checking the Refrigerant Charge NOTE Use a refrigerant recovery system whenever removing refrigerant. When working with refrigerants you must comply with all local government environmental laws. In the U.S.A., refer to EPA Section 608. d.
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g. Remove the Rotalock fittings from the suction and discharge service connections, and uncouple the unloader and economizer lines from the compressor. 6.8 COMPRESSOR WARNING h. Cut the dome temperature sensor (CPDS) wires. The replacement compressor comes with a CPDS already assembled. Make sure power to the unit is OFF and power plug disconnected before replacing the compressor. i. Remove and save the compressor base mounting bolts. Discard the 4 top resilient mounts and washers. j.
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o. Place the new Teflon seals at the compressor suction and discharge ports as well as the O−rings at the unloader and economizer line connection ports. Hand tighten all four connections. 6.9 HIGH PRESSURE SWITCH 6.9.1 Checking High Pressure Switch WARNING p. Torque the four base−mounting screws to 6.2 mkg (45 ft−lbs). Do not use a nitrogen cylinder without a pressure regulator. q. Torque the compressor ports / connections to: NOTE The high pressure switch is non-adjustable.
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f. Install fan loosely on motor shaft (hub side in). DO NOT USE FORCE. If necessary, tap the hub only, not the hub nuts or bolts. Install venturi. Apply “Loctite H” to fan set screws. Adjust fan within venturi so that the outer edge of the fan is within 2.0 +/- 0.07 mm (0.08” +/- 0.03”) from the outside of the orifice opening. Spin fan by hand to check clearance. 6.10 CONDENSER COIL The condenser coil consists of a series of parallel copper tubes expanded into copper fins.
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NOTE When Oakite Compound No. 32 is used for the first time, the local Oakite Technical Service representative should be called in for suggestions in planning the procedure. The representative will advise the reader on how to do the work with a minimum dismantling of equipment: how to estimate the time and amount of compound required; how to prepare the solution; how to control and conclude the de-scaling operation by rinsing and neutralizing equipment before putting it back into service.
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7. The time required for de-scaling will vary, depending upon the extent of the deposits. One way to determine when de-scaling has been completed is to titrate the solution periodically, using titrating equipment provided free by the Oakite Technical Service representative. As scale is being dissolved, titrate readings will indicate that the Oakite No. 32 solution is losing strength. When the reading remains constant for a reasonable time, this is an indication that scale has been dissolved.
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6.14.2 Evaporator Heater Replacement 1 2 The heaters are wired directly back to the contactor and if a heater failure occurs during a trip, the heater set containing that heater may be disconnected at the contactor. The next Pre-trip (P1) will detect that a heater set has been disconnected and indicate that the failed heater should be replaced. To remove a heater, do the following: a.
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e. Install the evaporator fan assembly in reverse order of removal. Torque the four 1/4-20 clamp bolts to 0.81 mkg (70 inch-pounds). Connect the wiring connector. 6.15.3 Assemble the Evaporator Fan Assembly a. Assemble the motor and plastic spacer onto the stator. NOTE When removing the black nylon evaporator fan blade, care must be taken to assure that the blade is not damaged. In the past, it was a common practice to insert a screwdriver between the fan blades to keep it from turning.
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Prior to Cleaning: 6.17.1 Replacing Electronic Expansion Valve and Screen − Always wear goggles, gloves and work boots. a. Removing an EEV 1. Pump down the compressor (refer to paragraph 6.4) and frontseat both suction and discharge valves. 2. Turn unit power off and remove power from the unit. − Avoid contact with skin and clothing, and avoid breathing mists. 3. Remove coil. 4.
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6.18 ECONOMIZER SOLENOID VALVE 6.19 ECONOMIZER EXPANSION VALVE 1 The economizer expansion valve (see Figure 2−4) is an automatic device that maintains constant superheat of the refrigerant gas leaving at the point of bulb attachment, regardless of suction pressure. 2 Unless the valve is defective, it seldom requires maintenance other than periodic inspection to ensure that the thermal bulb is tightly secured to the suction line and wrapped with insulating compound. 3 4 6.19.
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6. VALVE REMOVAL: The preferred method of removing the valve is to cut the connection between the brazed section and the valve, using a small tube cutter. Remove valve. 2 1 Alternately, use a wet rag to keep valve cool. Heat inlet and outlet connections to valve body and remove valve. 7. Clean the valve stem with mild cleaner, if necessary. 3 6 b. Installing the Economizer Expansion Valve: 1. The economizer expansion valve should be wrapped in a soaked cloth for brazing. 2.
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a. Press the CODE SELECT key then press an ARROW key until Cd41 is displayed in the left window. The right window will display a controller communications code. 6.21 VALVE OVERRIDE CONTROLS Controller function code Cd41 is a configurable code that allows timed operation of the automatic valves for troubleshooting. Test sequences are provided in Table 6−1. Capacity mode (CAP) allows alignment of the economizer solenoid valve in the standard and economized operating configurations.
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The guidelines and cautions provided herein should be followed when handling the modules. These precautions and procedures should be implemented when replacing a module, when doing any arc welding on the unit, or when service to the refrigeration unit requires handling and removal of a module. 6.22 AUTOTRANSFORMER If the unit does not start, check the following: a. Make sure the 460 VAC (yellow) power cable is plugged into the receptacle (see Figure 6−15) and locked in place. a.
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1 2 6. The display will show the message “Pro SoFt”. This message will last for up to one minute. 3 7. The display module will go blank briefly, then read “Pro donE” when the software loading has completed. (If a problem occurs while loading the software: the display will blink the message “Pro FAIL” or “bad 12V.” Turn start-stop switch OFF and remove the card.) 8. Turn unit OFF, via start-stop switch (ST). 4 9.
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b. Procedure for loading configuration software: 8. The display module will go blank briefly and then display “551 00”, based on the operational software installed. 9. Press the UP or DOWN ARROW key to scroll through the list to obtain the proper model dash number. (If a defective card is being used, the display will blink the message “bAd CArd.” Turn start-stop switch OFF and remove the card.) 10.Press the ENTER key on the keypad. 11.
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d. Using Driver Bit, Carrier Transicold part number 07−00418−00, remove the 4 screws securing the display module to the control box. Disconnect the ribbon cable and set the display module aside. 6.23.4 Removing and Installing a Controller a. Removal: 1. Disconnect all front wire harness connectors and move wiring out of way. NOTE The battery wires must face toward the right. 2. The lower controller mounting is slotted, loosen the top mounting screw (see Figure 6−16) and lift up and out. e.
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Table 6−2 Sensor Resistance 5C −40 −38.9 −37.8 −36.7 −35.6 −34.4 −33.3 −32.2 −31.1 −30 −28.9 −27.8 −26.7 −25.6 −24.4 −23.3 −22.2 −21.1 −20 −18.9 −17.8 −16.7 −15.6 −14.4 −13.3 −12.2 −11.1 −10.0 −8.
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Table 6−3 Sensor Resistance (CPDS) 5C *40 *38 *36 *34 *32 *30 *28 *26 *24 *22 *20 *18 *16 *14 *12 *10 *8 *6 *4 *2 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 °F *40 *36.4 *32.8 *29.2 *25.6 *22.0 *18.4 *14.8 *11.2 *7.6 *4.0 *0.4 3.2 6.8 10.4 14.0 17.6 21.2 24.8 28.4 32.0 35.6 39.2 42.8 46.4 50.0 53.6 57.2 60.8 64.4 68.0 71.6 75.2 78.8 82.4 83.0 89.6 93.2 96.
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g. If required, slide the cap and grommet assembly onto the replacement sensor. 6.24.2 Sensor Replacement a. Turn unit power OFF and disconnect power supply. NOTE Include white date code label when cutting out and removing defective sensors. The label could be required for warranty returns. h. Slip crimp fittings over dressed wires (keeping wire colors together). Make sure wires are pushed into crimp fittings as far as possible and crimp with crimping tool. i.
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11 1 12 2 13 3 4 5 6 10 7 (2.5”) 9 1. 2. 3. 4. 5. 6. 7. 8 Supply Air Stream Insulation Back Panel Supply Sensor Mounting Clamp Sensor Wires Drip Loop 8. 9. 10. 11. 12. 13. Gasket Mounting Plate Gasketed Support Plate Gasketed Cover TIR Bolts STS Probe SRS Probe Figure 6−19 Supply Sensor Positioning 1 4 1 2 3 1.50 in. (38.1cm) 1. Mounting Clamp 2 1. Wire Tie 2. ETS1 and 2 2. Return Sensor 1.00 in. (25.4cm) 3. ETS Tube Holder 4.
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open). This can occur if the vent is loose or the panel is defective. To confirm a defective panel, assure that the wing nut is secure and then power cycle the unit. If the alarm immediately reappears as active, the panel should be replaced. The alarm should immediately go inactive, check the 4-minute stability requirement. If the alarm reoccurs after the four minutes and the panel was known to have been stable, then the sensor should be replaced.
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6.26 eAutoFresh SERVICE Stepper Drive (SD) Stepper Motor (AF) 6.26.1 Servicing the eAutoFresh Air Filter Removing the Air Sample Filter Element The air sample filter element can be accessed in two ways: 1. Through the eAutoFresh side evaporator access panel (item 11, Figure 2−2). Figure 6−23 Stepper Components d. Set the SMA−12 pulse per second (PPS) to one PPS and press button to open or close the valve. Each LED should light sequentially until all four are lit.
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There should be approximately five volts DC on sockets “C” and “D” (S1 and S2) when measured as above. If not the connections or controller is faulty. If any of these pins are not consistent, the connections or the controller is suspect. Check and replace as required. 6.26.3 Checking the Controller a. Turn the unit OFF. b. Disconnect the six pin connector to the stepper drive from the controller. c.
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1 2 5 3 6 7 8 4 12 1 1. 2. 3. 4. 5. 6. Connector Tie Wrap eAutoFresh Panel Cup, Motor Rail, Top Plate, Gasket 11 10 9 7. Grille 8. Grill Screws 9. Rail Screws 10. Plate, Slide 11. Rail, Bottom 12.
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period is less than thirty days, the recorder will retrieve the logged data from the DataCORDER for the power off period and record it onto the chart. Thereafter, the recorder will resume normal temperature recording. 6.27 ELECTRONIC PARTLOW TEMPERATURE RECORDER The microprocessor−based temperature recorder is designed to interface with the DataCORDER to log temperature with time.
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6.27.2 Recalibrating the Temp Recorder to Zero 6.29 COMMUNICATIONS INTERFACE MODULE INSTALLATION For Electronic Partlow Recorder CTD part number 12-00464-xx Where xx= an odd number (example: 12-00464-03) NOTE Use chart CTD: part number 09-00128-00 (F), part number 09-00128-01 (C). a. Press the “Calibration” button (item 7, Figure 6−26) on the bottom of the recorder. The pen tip will drive fully down scale, then move upscale to the chart ring at -29 C (-20 F), and stop. b.
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Table 6−4 R-134a Temperature - Pressure Chart Temperature Vacuum Temperature Pressure F C “/hg cm/hg kg/cm2 -40 -40 14.6 49.4 37.08 0.49 28 -2 24.5 168.9 1.72 1.69 -35 -37 12.3 41.6 31.25 0.42 30 -1 26.1 180.0 1.84 1.80 -30 -34 9.7 32.8 24.64 0.33 32 0 27.8 191.7 1.95 1.92 -25 -32 6.7 22.7 17.00 0.23 34 1 29.6 204.1 2.08 2.04 -20 -29 3.5 11.9 8.89 0.12 36 2 31.3 215.8 2.20 2.16 -18 -28 2.1 7.1 5.33 0.07 38 3 33.2 228.9 2.33 2.
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Table 6−5 Recommended Bolt Torque Values BOLT DIA. THREADS TORQUE FREE SPINNING #4 40 5.2 in-lbs #6 32 9.6 in-lbs #8 32 20 in-lbs #10 24 23 in-lbs 1/4 20 75 in-lbs 5/16 18 11 ft-lbs 3/8 16 20 ft-lbs 7/16 14 31 ft-lbs 1/2 13 43 ft-lbs 9/16 12 57 ft-lbs 5/8 11 92 ft-lbs 3/4 10 124 ft-lbs NONFREE 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 Nm 0.6 1.1 2.0 2.5 8.4 15 28 42 59 78 127 171 SPINNING (LOCKNUTS ETC.) 20 82.5 in-lbs 9.3 18 145.2 in-lbs 16.4 16 22.0 ft-lbs 23 14 34.1 ft-lbs 47 13 47.3 ft-lbs 65 12 62.
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SECTION 7 ELECTRICAL WIRING SCHEMATICS 7.1 INTRODUCTION This section contains the Electrical Schematics and Wiring Diagrams. The diagrams are presented as follows: Figure 7−1 provides the legend for use with Figure 7−2, the schematic diagram for standard refrigeration units. Figure 7−2 provides the basic schematic diagram for standard refrigeration units.
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LEGEND SYMBOL DESCRIPTION SYMBOL DESCRIPTION AMBS AMBIENT SENSOR (C−21) HR HEATER CONTACTOR (P−4, M−13) C CONTROLLER (J−19) HS HUMIDITY SENSOR (F−21) CB1 CIRCUIT BREAKER − 460 VOLT (F−1) HTT HEAT TERMINATION THERMOSTAT (G−13) CF CONDENSER FAN CONTACTOR (M−11, P−6) ICF INTERROGATOR CONNECTOR FRONT (T−21) CH COMPRESSOR CONTACTOR (M−7, P−1) ICR INTERROGATOR CONNECTOR REAR (T−22) CI COMMUNICATIONS INTERFACE MODULE (OPTION) (A−3) IP INTERNAL PROTECTOR (E−12, H−10, H−12) PA UNIT PHASE C
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Based on Drawing 62−11271 Rev A Figure 7−2 SCHEMATIC DIAGRAM − Standard Unit Configuration 7−3 T-340
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LEGEND SYMBOL DESCRIPTION SYMBOL DESCRIPTION AMBS AMBIENT SENSOR (C−21) HPS HIGH PRESSURE SWITCH (G−7) C CONTROLLER (J−19) HR HEATER CONTACTOR (P−4, P−5, M−13) CB1 CIRCUIT BREAKER − 460 VOLT (H−1) HS HUMIDITY SENSOR (OPTIONAL) (F−21) CB2 OPTIONAL CIRCUIT BREAKER − DVM (OPTION) (C−1) TERMINAL BLOCK WHEN CB2 NOT PRESENT HTT HEAT TERMINATION THERMOSTAT (G−13) ICF INTERROGATOR CONNECTOR FRONT (T−21) ICR INTERROGATOR CONNECTOR REAR (T−22) CF CONDENSER FAN CONTACTOR (M−7, M−8, P−1) CH COM
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OR OR see Figure 7−7 for VPS Based on Drawings 62−66721 and 62−11271 Rev A Figure 7−4 SCHEMATIC DIAGRAM − Configuration Includes Available Options (Except Vent Positioning System, eAutoFresh, Emergency Bypass Options) 7−5 T-340
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LEGEND SYMBOL DESCRIPTION SYMBOL DESCRIPTION AF EAUTOFRESH STEPPER MOTOR (OPTION) (J−18) HPS HIGH PRESSURE SWITCH (F−10) AMBS AMBIENT SENSOR (C−22) HR HEATER CONTACTOR (P−4, M−16) BM BYPASS MODULE (OPTION) (R−18) HS HUMIDITY SENSOR (OPTIONAL) (F−22) C CONTROLLER (J−19) HTT HEAT TERMINATION THERMOSTAT (F−16) CB1 CIRCUIT BREAKER − 460 VOLT (F−1) ICF INTERROGATOR CONNECTOR FRONT (T−22) CB2 OPTIONAL CIRCUIT BREAKER − DVM (OPTION) (C−1) TERMINAL BLOCK WHEN CB2 NOT PRESENT ICR INTERROGATO
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see Figure 7−4 for optional heater and 3−ph condenser fan motor arrangements see Figure 7−7 for VPS Based on Drawing 62−11418 Rev A Figure 7−6 SCHEMATIC DIAGRAM − Configuration Includes eAutoFresh and Emergency Bypass Options 7−7 T-340
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(SEE NOTE) PTC (SEE NOTE) PTC NOTE: DEPENDING ON CONFIGURATION: − VPS 2 MAY BE CONNECTED TO L1 OR T1 − PTC MAY BE INSTALLED Figure 7−7 SCHEMATIC AND WIRING DIAGRAM − Upper Vent Position Sensor (VPS) Option T-340 7−8
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Figure 7−8 SCHEMATIC AND WIRING DIAGRAM − Lower Vent Position Sensor (VPS) Option 7−9 T-340
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Figure 7−9 UNIT WIRING DIAGRAM − Standard Unit Configuration with 3−Phase Condenser Fan Motors (Sheet 1 of 2) T-340 7−10
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Based on Drawing 62−11271 Rev A Figure 7−9 UNIT WIRING DIAGRAM − Standard Unit Configuration with 3−Phase Condenser Fan Motors (Sheet 2 of 2) 7−11 T-340
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Figure 7−10 UNIT WIRING DIAGRAM − Configuration Includes Single Phase Condenser Fan Motor and Optional Heater Arrangement (Sheet 1 of 2) T-340 7−12
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Based on Drawing 62−66721 Figure 7−10 UNIT WIRING DIAGRAM − Configuration Includes Single Phase Condenser Fan Motor and Optional Heater Arrangement (Sheet 2 of 2) 7−13 T-340
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Figure 7−11 UNIT WIRING DIAGRAM − Configuration Includes eAutoFresh and Emergency Bypass Options (Sheet 1 of 2) T-340 7−14
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Based on Drawing 62−11418 Rev A Figure 7−11 UNIT WIRING DIAGRAM − Configuration Includes eAutoFresh and Emergency Bypass Options (Sheet 2 of 2) 7−15 T-340
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INDEX A Adjusting Fresh Air Makeup, 4−1 Air−Cooled Condenser Description, 2−4 Alarm Code, 3−29 Controller, 1−2, 3−3 CONTROLLER ALARM INDICATIONS, 3−29 Controller Alarms, 3−12 Controller Alarm Codes, 3−29 Controller Configuration Codes, 3−19 Alarm Indications, 3−29 CONTROLLER FUNCTION CODES, 3−20 Alarm Troubleshooting Sequence, 3−28 CONTROLLER PRE−TRIP TEST CODES, 3−37 Aluminum oxide, 6−11 Controller Service, 6−16 Automatic Defrost, 3−9 CONTROLLER SOFTWARE, 3−3 Autotransformer, 1−2 Autotransformer
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INDEX (Continued) E G eAutoFresh, 1−2 General Unit Description, 2−1 eAutoFresh Modes of Operation, 4−3 Generator Protection, 3−11 eAutoFresh Operation, 4−3 Gutters, 1−2 eAutoFresh Pre−Trip Inspection, 4−3 eAutoFresh Service, 6−25 H eAutoFresh Start−Up Procedure, 4−3 Economized Operation, Refrigeration Circuit, 2−10 Economizer Expansion Valve Service, 6−13 Economizer Solenoid Valve Service, 6−13 EEV Replacement, 6−13 Electrical Data, 2−8 Electronic Expansion Valve Description, 2−10 Handles, 1−2 H
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INDEX (Continued) O S Operational Software (Cd Function Codes), 3−4 Safety and Protective Devices, 2−9 Option Descriptions, 1−1 Sensor, Compressor Discharge Temperature, 6−24 P SERVICE CONNECTIONS, 6−2 Standard Operation, Refrigeration Circuit, 2−10 Painted Surfaces Maintenance, 6−29 Start up − Compressor Bump Start, 3−4 Perishable Dehumidification, 3−5 Start up − Compressor Phase Sequence, 3−4 Perishable Economy, 3−6 Start−Up Inspection, 4−5 Perishable Heating, 3−4 Starting Instructions, 4−
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INDEX (Continued) V 0 Valve Override Controls, 6−15 07−00176−11, 6−3 Vent Position Sensor, 4−3 07−00277−00, 6−16 VENT POSITION SENSOR (VPS), 6−24 07−00294−00, 6−1 07−00304−00, 6−16 W Water Cooling, 1−2 09−00128−00, 6−29 09−00128−01, 6−29 Water−Cooled Condenser Description, 2−5 7 Water−Cooled Condenser Service, 6−7 Wiring Schematic, 7−1 T-340 76−00685−00, 6−29 Index−4
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Carrier Transicold Division, Carrier Corporation P.O. Box 4805 Syracuse, N.Y. 13221 U.S A A member of the United Technologies Corporation family. Stock symbol UTX www.carrier.transicold.