Carrier 30GN040-420 operating instructions Controls, Operation, Troubleshooting

Page 1

30GN040-420

Flotronic™ II Reciprocating Liquid Chillers 50/60 Hz

Controls, Operation, and

Troubleshooting

with Microprocessor Controls and Electronic Expansion Valves

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . 2

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

MAJOR SYSTEM COMPONENTS . . . . . . . . . . . . 2-5

Processor Module . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Low-Voltage Relay Module . . . . . . . . . . . . . . . . . . . 4

Electronic Expansion Valve Module . . . . . . . . . . . 4

Options Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Keypad and Display Module

(Also Called HSIO or LID) . . . . . . . . . . . . . . . . . . 4 Control Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electronic Expansion Valve (EXV) . . . . . . . . . . . . 4 Thermostatic Expansion Valves (TXV) . . . . . . . . 4 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Compressor Protection Control

Module (CPCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

OPERATION DATA . . . . . . . . . . . . . . . . . . . . . . . . . . 5-46

Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Head Pressure Control . . . . . . . . . . . . . . . . . . . . . . 24

·EXV UNITS

·TXV UNITS

Pumpout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

·EXV UNITS

·TXV UNITS

Keypad and Display Module

(Also Called HSIO or LID) . . . . . . . . . . . . . . . . . 24

·ACCESSING FUNCTIONS AND SUBFUNCTIONS

·AUTOMATIC DEFAULT DISPLAY

·AUTOMATIC DISPLAY OPERATION/DEFAULT DISPLAY

·KEYPAD OPERATING INSTRUCTIONS

·STATUS FUNCTION

·TEST FUNCTION

·HISTORY FUNCTION

·SET POINT FUNCTION

·SERVICE FUNCTION

·SCHEDULE FUNCTION

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 47-64 Checking Display Codes . . . . . . . . . . . . . . . . . . . . 47

Page

Unit Shutoff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Complete Unit Stoppage . . . . . . . . . . . . . . . . . . . . 48

Single Circuit Stoppage . . . . . . . . . . . . . . . . . . . . . 48

Lag Compressor Stoppage . . . . . . . . . . . . . . . . . . 48

Restart Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 48

· POWER FAILURE EXTERNAL TO THE UNIT

Alarms and Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Compressor Alarm/Alert Circuit . . . . . . . . . . . . . 50

Electronic Expansion Valve (EXV) . . . . . . . . . . . 55

·EXV OPERATION

·CHECKOUT PROCEDURE

Thermostatic Expansion Valve (TXV) . . . . . . . . . 57

Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

·LOCATION

·THERMISTOR REPLACEMENT (T1, T2, T7, T8)

Pressure Transducers . . . . . . . . . . . . . . . . . . . . . . 60

·TROUBLESHOOTING

·TRANSDUCER REPLACEMENT

Control Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

·PROCESSOR MODULE (PSIO), 4IN/4OUT

MODULE (SIO), LOW-VOLTAGE RELAY MODULE (DSIO-LV), AND EXV DRIVER MODULE (DSIO-EXV)

·RED LED

·GREEN LED

·PROCESSOR MODULE (PSIO)

·LOW-VOLTAGE RELAY MODULE (DSIO)

·4IN/4OUT MODULE (SIO)

ACCESSORY UNLOADER INSTALLATION . . . 64-68

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

·040-110, 130 (60 Hz) UNITS (And Associated Modular Units)

·130 (50 Hz), 150-210 UNITS (And Associated Modular Units)

FIELD WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69,70

REPLACING DEFECTIVE PROCESSOR MODULE (PSIO) . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Manufacturer reserves the right to discontinue, or change at any time, speci®cations or designs without notice and without incurring obligations.

Book

2

 

PC 903

Catalog No. 563-079

Printed in U.S.A.

Form 30GN-3T

Pg 1

7-95

Replaces: 30G-1T

Tab

5c

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 1 Page 2
Image 1
Page 1 Page 2
Contents Controls, Operation, Troubleshooting Unit Model Nominal Section a Section B Unit Sizes and Modular CombinationsTons Unit 30GN 30GN Control Panel 040-110 Unit Shown LOCAL/ENABLE LOCAL/ENABLE-STOP-CCN Switch Positions and OperationKeypad and Display Module Also Called Hsio StopThermistor and Transducer Locations Compressor Protection Control Module CpcsThermistors Pressure TransducersLoading Sequence a Loading Sequence B Unit Control Ð Capacity Control StepsSteps Ð Capacity Control Steps, 040-070 Ð Capacity Control Steps, 040-070 A1²,B1² Displacement Compressors Approx 080, 230B 60 HzA1²**, B1² A1²**,B1²090, 245B 60 Hz Compressors Displacement090, 245B 50 Hz 270B 60 Hz 100, 255B270B 50 Hz Unit Control Loading Sequence a Loading Sequence B315B 60 Hz 110, 290B315B 50 Hz A1*,A2,B1 A1,A2,B1 A1²²,A2,B1,B2 A1*,A2,B1,B2 130 60 Hz 150, 230A, 245A 130 50 HzA1,kB1 330A/B 60 Hz 170, 270A330A/B,360B 50 Hz 330A/B, 360B 50 Hz 390B 60 Hz Approx 190, 290A, 360A/BA1,B1 A1**,B1420A/B 60 Hz 210, 315A, 390A420A/B 50 Hz Pumpout Head Pressure ControlFAN Arrangement FAN Numbers FAN Contactor Controlled by Condenser Fan SequenceFunctions and Subfunctions Keypad and Display Module UsageFunction USE Keys Operative USE KeysKeypad Directory Accessing Functions and SubfunctionsKeypad Directory Status TemperatureSubfunction Keypad Entry Display Comment Stage SET PointAnalog Subfunction Keypad Entry Display Comment PressureInputs OutputsSubfunction Keypad Entry Display Comment Outputs Subfunction Keypad Entry Display CommentSubfunction Keypad Entry Display Comment Compressors Unloaders CPA1Keypad Directory Test Keypad Directory Schedule Configuration Keypad Directory ServiceService Subfunction Keypad Entry Display Comment FactorySubfunction Keypad Entry Display Comment RUN Time ALARM/ALERTStarts HISTORY²²Subfunction Keypad Entry Display Comment SET Points Reset SET PointsDemand SET Points Date and TimeExample 2 Ð Reading Current Operating Modes Example 1 Ð Reading Alarm CodesKeypad Display Comments Entry Response Operational and Mode Display Codes Reset Set Points Example 3 Ð Using Test FunctionReset Amounts Example 5A Ð External ResetExample 4 Ð Reading and Changing Chilled Fluid Set Point Measurement Method Input Data DescriptionKeypad Display Comments Entry Response Example 5C Ð Using Return Fluid Temperature ResetSwitch PowerComm Ð Communications Bus PWRPassword Service FunctionsSUB Keypad Display Comment LoggedonExample 8 Ð Setting Time of Day Day of Week To Disable Demand Limit4-20 mA Demand Limiting Factory Conguration Keystrokes Adjustable Field CongurationsKeypad Display Comment Entry Example 9 Ð Using the Schedule FunctionProgramming Period Keypad Display Comment Entry Programming PeriodEnter Display Example 10 Ð Holiday Schedule FunctionStop position. Unit cannot start if these contacts are Typical Stoppage Faults and Reset TypesLOCAL/ENABLE-STOP-CCN Alarm and Alert CodesFSM CpcsWSM DGT COM, CommDsio HPSComm CGF Subfunction. Groups Electronic Expansion Valve EXV EXV Cable Connections to EXV Driver Module, Dsio EXV Thermistor Replacement T1, T2, T7, T8 Temperature Voltage Resistance Drop Ohms Temperature Voltage Resistance Drop Thermistor and Pressure Transducer Locations Thermistor Locations Circuits a and B, Lead Compressor Only Lead Compressor Transducer and Thermistor Locations Control Modules Module Address Selector Switch LocationsAccessory Unloader Installation 4 In/4 Out Module SIO InstallationStandard and Accessory Unloaders TroubleshootingPage ²Or HGBPR-B Or HGBPR-AHgbpr Ð COMOutdoor-Air Temperature Externally PoweredCWP Ð Chilled Water Fluid Pump TB Ð Terminal BlockInterlocks Remote AlarmPage Copyright 1995 Carrier Corporation

30GN040-420 specifications

The Carrier 30GN040-420 is a well-regarded model within the industry of chillers, designed to deliver efficient cooling solutions for a variety of commercial applications. Its compact design and advanced technology make it an ideal choice for businesses looking to optimize their HVAC systems.

One of the standout features of the Carrier 30GN series is its flexibility. This chiller model is available in a range of capacities, specifically from 40 to 420 tons, allowing for customized solutions based on specific cooling demands. Such versatility enables this unit to cater to a broad array of installations, from small commercial spaces to larger industrial facilities.

The Carrier 30GN040-420 utilizes a scroll compressor design, known for its reliability and efficiency. The scroll technology allows for a reduction in the number of moving parts, resulting in lower maintenance costs and increased durability. Additionally, the unit operates with environmentally friendly refrigerants such as R-410A, promoting sustainability without compromising performance.

Energy efficiency is another significant aspect of this model. The 30GN series is designed to provide high energy efficiency ratios (EER), which translates to lower operational costs for users over the lifespan of the unit. This is particularly beneficial in an era where energy costs are consistently rising.

The advanced controls found within the Carrier 30GN040-420 further enhance its performance and ease of use. The unit is equipped with a microprocessor-based control system that allows for precise temperature management while providing valuable diagnostic information. This feature not only improves the overall reliability of the system but also facilitates proactive maintenance, reducing the risk of unscheduled downtime.

Moreover, the design of the Carrier 30GN040-420 emphasizes quiet operation, making it suitable for environments where noise levels must be minimized. This characteristic is critical for applications in hospitals, schools, or office buildings, where a peaceful atmosphere is essential.

In summary, the Carrier 30GN040-420 chiller provides a robust solution for businesses requiring dependable and efficient cooling. Its features, including flexible capacity options, reliable scroll compressors, energy-efficient performance, advanced controls, and quiet operation, position it as a top choice for various commercial and industrial applications. As technology continues to evolve, models such as the 30GN series remain at the forefront, meeting the demands of modern HVAC needs while ensuring sustainability and efficiency.
Top Page Image Contents