TABLE OF CONTENTS
4
VCB-X Controller Field Technical Guide
Alarm Detection and Reporting .............................................................................................................................. 74
Sensor Failure Alarms ............................................................................................................................................ 75
Mechanical Failure Alarms ..................................................................................................................................... 75
Failure Mode Alarms .............................................................................................................................................. 76
Title 24 Economizer Alarms ................................................................................................................................... 76
VAV/Zone Controller Alarms ................................................................................................................................... 77
Relay Outputs ........................................................................................................................................................ 77
Trend Logging ........................................................................................................................................................ 77
TROUBLESHOOTING ..................................................................................................................... 78
LED Diagnostics .................................................................................................................................................... 78
VCB-X Controller & VCB-X EM1 Expansion Module LED Locations ..................................................................... 79
LED Operation ....................................................................................................................................................... 80
APPENDIX A .................................................................................................................................. 81
System Con
fi
gurations ........................................................................................................................................... 81
Space, Outdoor Air, or Return Air Temperature Sensor Testing ............................................................................. 85
Copeland
®
Discharge Thermistor Temperature Sensor Testing ............................................................................ 86
OE271 & OE258-01 Pressure Sensor Testing ....................................................................................................... 87
OE275-01 Suction Pressure Transducer Testing ................................................................................................... 88
Head Pressure Transducer Troubleshooting ......................................................................................................... 89
APPENDIX B - LCD Display Screens (Controller Interface & BACnet
®
Confi guration) ................ 90
APPENDIX C - VCB-X BACnet
®
Connection to MS/TP Network, BACnet Parameters
& PICS Statement ................................................................................................................... 95
INDEX .......................................................................................................................................... 106