Troubleshooting; Using Status Leds; Figure 48. Main Board Layout - McQuay MicroTech II Operation Manual

Troubleshooting

Using Status LEDs

The CSM controller includes a series of LEDs that can be used to determine the status of a variety of normal operating
parameters for the unit. They are located on the main circuit board (see Figure 48). From the top of the board to the
bottom, these include the following:
•
Lon Port
•
Ethernet Port
•
Heartbeat
•
Serial Port

Figure 48. Main Board Layout

LON Port
*LCD Display
Ethernet
Connection
Ethernet
Heartbeat
Phone
Connector
Serial Port
* Not Currently Supported
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LED's
LED's
LED's
COM3 COM4 COM1 COM2 COM5 COM6
OM 780-2