York YVAA Installation, Operation & Maintenance Instructions Manual page 8

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
Configuration 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
8
TABLE OF CONTENTS (CONT'D)
FORM 201.28-NM1.1
ISSUE DATE: 1/31/2018
JOHNSON CONTROLS