Page | 31
Appendix B: Troubleshooting Guide
This section describes possible solutions to some common problems when connecting to
the Intelli-Hood system.
Cannot detect any Intelli-Hood Device Objects
Problem: The Intelli-Hood system cannot be discovered from the Operator’s Workstation.
Device discovery yields no results for the expected Intelli-Hood Device Objects. Search
for specific points under specific Device Objects also yields no results.
Diagnosis: Validate network connectivity is working and configured correctly for the
Intelli-Hood system. See the section “Networking Setup and Configuration” and review
the steps and validate that the Intelli-Hood system can be seen on the network.
If you are doing a ranged Device discovery, validate that the Intelli-Hood system is
configured for the correct Device Instance Numbers. See the section “BACnet Setup and
Configuration” and review the settings for the Intelli-Hood system.
Melink sells a standard System Controller and a Lite System Controller. The Lite System
Controller does not support BACnet communication. To determine if you have a standard
or Lite System Controller, either go to Menu->About from the Touchpad or look at the
label on the inside door of the System Controller enclosure. If the serial number starts
with “V3”, for example “V300012” then you have a standard System Controller and
BACnet communication is available. If the serial number starts with “V4”, for example
“V400020”, then you have a Lite System Controller and BACnet communication is not
available. If you do have a Lite System Controller, contact Melink Corporation on how to
obtain a standard System Controller.
Can only detect the System Controller Device Object
Problem: The Operator’s Workstation can detect the System Controller Device Object
and its points, but it does not discover the Exhaust Fan, Auxiliary Airflow or the Hood
Controller Device Objects.
Diagnosis: The most common cause for this problem is due to how most Operator
Workstations perform Device discovery. Most will send a Who-Is message that is
formatted such that it does not get broadcast through BACnet routers. This is intentional
by the Operator Workstation in order to speed up Device discovery. Each Operator
Workstation’s interface is different, but these are the general steps to follow in order to
discover the Intelli-Hood virtual Device Objects:
1.
Through the Operator Workstation, discover the BACnet routers in the network. This option is
usually called “BACnet Discovery” or “Network Discovery” on the Operator Workstation.
