20 • Control Link ACC I&O Manual 026-4704 Rev 6
network wiring or configuration.
• For Control Link ACCs equipped with dewpoint
sensors, you should see the TX LED blink to
indicate transmission. If not, there may be a problem
with MODBUS or dewpoint sensor wiring.
• For Control Link ACCs that do not have dewpoint
sensors directly connected to them, verify the Status
LED is blinking once every 2 seconds to indicate
status is OK. If this LED blinks in a repeating
pattern of three short blinks, it means the Control
Link ACC is not receiving a dewpoint sensor value
broadcast over the network. There may be a problem
with the MODBUS or dewpoint sensor wiring.
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