400W Series
190-01226-14 Rev. 3
Instructions for Continued Airworthiness Bell 407
Page 16 of 26
Problem Possible
Cause
Solution
RS-232 device is not
communicating with
the
400W/420W/430W.
400W Series unit RS-232 port not
configured correctly.
Check RS-232 port setting for port that
device is connected to.
Improper setup on the remote
device.
Verify the configuration of the other
device.
Device not compatible, or improper
connection.
Verify 400W Series unit RX is connected
to remote device TX and 400W Series
unit TX is connected to remote device
Rx.
Multiple TX lines connected
together.
Verify that there is only one TX source
per RX port.
Wiring connections are incorrect.
Check
wiring.
Fan Fail Annunciation.
Wiring connections are incorrect.
Check
wiring.
Fan has failed.
Replace
fan.
Summary of Contents for 400W Series
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