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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 5c
PC 903 Catalog No. 563-079 Printed in U.S.A. Form 30GN-3T Pg 1 7-95 Replaces: 30G-1T