Light Emitting Diodes (Leds); Figure 2. Bacnet Ms/Tp Communication Module Components - McQuay MicroTech III Installation And Maintenance Manual

Figure 2 shows the location of the major components of the BACnet MS/TP Communication
Module.

Figure 2. BACnet MS/TP Communication Module Components

Light Emitting Diodes (LEDs)

The BACnet Communication Module has a BSP LED and a BUS LED to indicate communication
activity and status of the BACnet Communication Module. These indicators are visible when the
communication module is connected to the MicroTech III Chiller Unit Controller and the unit is
powered on (see Figure 2).
BSP LED
The BSP LED indicates the communication state between the BACnet Communication Module and
the MicroTech III Chiller Unit Controller. The table below describes the status of the BSP LED.
BSP LED Color
Flashing between Red & Green
Green
Yellow
Red flashing with 2Hz
Red
1
In the event that this should occur, cycle power to the unit controller to attempt to clear the problem. Contact
the McQuay Controls Customer Support Group at 866-4MCQUAY (866-462-7829) for additional assistance if
necessary.
6
Network Connector
+ - Ref
Meaning
Board Support Package (BSP) upgrade in progress
Communication is established with the unit controller
Communication is established between the communication
module and the unit controller.
The communication module is capable of communicating to
the unit controller. However, communication is not
established.
Red flashing with 2Hz = Software error.
Hardware error.
BUS LED
BSP
1
1
IM 967-1