JOHNSON CONTROLS
8
FORM 201.28-NM1.1
ISSUE DATE: 1/31/2018
TABLE OF CONTENTS (CONT'D)
Basic Operating Sequence ...........................................................................................................................103
Start Sequence and Loading ...............................................................................................................103
Unit Warning .................................................................................................................................................103
Unit Warning Operation .......................................................................................................................103
Low Battery Warning ...........................................................................................................................103
Microboard (331-03478-xxx) ........................................................................................................................104
Power Supplies and LEDs ...................................................................................................................104
Power Supply Test Points ....................................................................................................................104
Conîš¿guration Jumpers .......................................................................................................................104
Building Automation System (BAS) Communications ..................................................................................106
Using Communications Protocol .........................................................................................................106
E-Link or SC-EQ Interface ............................................................................................................................107
SC-EQ or E-Link BAS Communications Card .............................................................................................. 110
VSD ..................................................................................................................................................... 118
Program Update ........................................................................................................................................... 118
Data Logging ................................................................................................................................................ 118
Invalid Number of Compressors Warning............................................................................................ 119
Invalid Serial Number Warning ............................................................................................................ 119
Unit Safeties .................................................................................................................................................120
Unit Safety Operation ..........................................................................................................................120
High Ambient Temp Fault ....................................................................................................................120
Low Ambient Temp Fault .....................................................................................................................120
Low Leaving Chilled Liquid Temp Fault ............................................................................................... 120
VSD Communications Failure Fault ....................................................................................................120
System Safeties (Faults) ..............................................................................................................................121
System Safety (Fault) Operation .........................................................................................................121
High Discharge Pressure Cutout (Software) Fault ..............................................................................121
High Discharge Pressure Cutout (HPCO) (Hardware) Fault .............................................................. 121
Low Suction Pressure Cutout (Software) Fault ...................................................................................122
Low Motor Current Cutout Fault ..........................................................................................................122
High Differential Oil Pressure Cutout Fault .........................................................................................122
Low Differential Oil Pressure Cutout Fault ..........................................................................................122
High Discharge Temperature Cutout Fault ..........................................................................................123
Low Discharge Superheat Cutout Fault ..............................................................................................123
Discharge Pressure Load Limiting/Unloading .....................................................................................123
Suction Pressure Load Limiting/Unloading .........................................................................................124
Sensor Failure Cutout Fault ................................................................................................................124
High Motor Temperature Cutout Fault .................................................................................................125
System Control Voltage Cutout Fault ..................................................................................................125
Eductor Clog Fault ...............................................................................................................................125
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