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

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