Carrier 69NT40-551-599 - User Manual

T--334 Rev B
OPERATION AND SERVICE
for
69NT40--551--500 TO 599
Container Refrigeration Units
Container Refrigeration
R
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Summary

Safety Summary

Specific Warning and Caution Statements

Section 2 Description

2.2 Refrigeration System Data

2.4 Safety and Protective Devices

2.5 Refrigeration Circuit

Describes the unit's refrigeration circuit operations: standard, economized, and unloaded modes.

Section 3 Microprocessor

3.1 Temperature Control Microprocessor System

Details the components of the Micro-Link 3 system, including keypad, display, and controller.

3.2 Controller Software

3.3 Modes of Operation

3.4 Controller Alarms

Provides information on controller alarms, their indications, and diagnostic actions.

3.5 Unit Pre-Trip Diagnostics

Details the pre-trip diagnostic function for automatic and individual unit testing.

3.6 DataCORDER

Explains the DataCORDER system for recording and retrieving unit operating data and events.

Section 4 Operation

4.1 Inspection (Before Starting)

4.6 Starting and Stopping Instructions

4.7 Start-Up Inspection

4.8 Pre-Trip Diagnosis

Detailed instructions on initiating and performing pre-trip diagnostic tests.

4.10 Sequence of Operation

Section 5 Troubleshooting

5.1 Unit Will Not Start or Starts Then Stops

Troubleshooting steps for units that fail to start or cycle on and off.

5.2 Unit Operates Long or Continuously in Cooling

Diagnoses for units that run continuously or for extended periods in cooling mode.

5.3 Unit Runs But Has Insufficient Cooling

Troubleshooting for units experiencing reduced cooling capacity.

5.4 Unit Will Not Heat or Has Insufficient Heating

Steps to diagnose issues with units not heating or providing insufficient heat.

5.5 Unit Will Not Terminate Heating

Troubleshooting for units that fail to stop the heating cycle.

5.6 Unit Will Not Defrost Properly

Solutions for units that do not initiate or complete defrost cycles correctly.

5.7 Abnormal Pressures (Cooling)

Analysis of abnormal high or low pressures during cooling operation.

5.8 Abnormal Noise or Vibrations

Guidance on identifying and resolving unusual noises or vibrations from unit components.

5.9 Controller Malfunction

Troubleshooting steps for controller errors and non-responsive behavior.

5.10 No Evaporator Air Flow or Restricted Air Flow

Diagnosing causes for lack of or restricted air flow from the evaporator.

5.11 Thermostatic Expansion Valve Malfunction

Troubleshooting issues related to the thermostatic expansion valve's performance.

5.12 Autotransformer Malfunction

Steps for diagnosing autotransformer malfunctions affecting unit start-up.

5.13 Water-Cooled Condenser or Water Pressure Switch

5.14 Compressor Operating in Reverse

Diagnosing and correcting compressor operation in the reverse direction.

5.15 Abnormal Temperatures

5.16 Abnormal Currents

Section 6 Service

6.3 Refrigeration System Service - Units with Standard Piping (with Service Valves)

6.4 Refrigeration System Service - Units with Semi-Hermetic Piping (without Service Valves)

6.5 Compressor

Detailed instructions for compressor removal and replacement.

6.6 Compressor Oil Level

6.7 High Pressure Switch

6.8 Condenser Coil

6.9 Condenser Fan and Motor Assembly

6.12 Expansion Valves

6.13 Evaporator Coil and Heater Assembly

6.14 Economizer, Unloader, Liquid Injection, and Expansion Bypass Solenoid Valves

6.15 Evaporator Fan and Motor Assembly

6.18 Suction Modulation Valve

6.20 Controller

6.21 Vent Position Sensor Service

6.22 Temperature Sensor Service

6.23 Electronic Partlow Temperature Recorder

6.26 Communications Interface Module Installation

Carrier 69NT40-551-599 Specifications