Carrier 30GN040-420 User Manual

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

30GN040-420

Flotronic™ II Reciprocating Liquid Chillers

50/60 Hz

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

Book 2
Tab

PC 903

Catalog No. 563-079

Printed in U.S.A.

Form 30GN-3T

Pg 1

7-95

Replaces: 30G-1T