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9.1.3. TX and RX Status LEDs
If the Control Link ACC is being networked with
other Control Link ACCs via its MODBUS network
connection, the TX and RX LEDs blink to indicate
transmission and receipt of network messages. On a
properly networked Control Link ACC, the RX LED
should blink about once every 15 seconds. If a
Control Link ACC has a dewpoint sensor, you should
also see the TX LED blink. If these LEDs do not
blink, there may be a problem with the MODBUS
network connection.
Control Link ACC Status LEDs
Operation • 29
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