Honeywell BENDIX/KING KLN 94, Pilot'S Manual

Page: 154 / 284

5.7. AVIONICS BUS VOLTAGE ALERTING
The SET 9 page serves as a monitor of your avionics power bus. It gives
you a digital readout of the voltage supplied to your avionics, down to
tenths of volts. You will find this feature valuable as an extra layer of
security in cases of electrical or charging system problems.
A voltage alert feature is also available on this page, to warn you of an
electrical system problem, regardless of whether you are viewing the
SET 9 page or not. It is set up so that the avionics bus voltage must drop
below the alert limit for a certain length of time. This time delay is so that
brief power interruptions don’t trigger the voltage alert.
The alert voltage and the alert delay are set at the time of installation and
stored in the KLN 94 configuration module. As the pilot, your two options
are to have the voltage alert disabled, or to have it enabled with the prede-
fined voltage and time delay values.
To enable the voltage alert feature:
1. Select the SET 9 page (figure 5-
51) and turn on the cursor (
B
).
2. Turn the right inner knob one
step to enable the alert feature.
The alert voltage and alert delay
will be displayed on lines 2 and 3
(figure 5-52).
3. Turn off the cursor (
B
).
If the avionics bus voltage drops
below the alert voltage for the speci-
fied delay time, the message
Low Bus Voltage
Check Charging System
will be displayed. This message may be indicative of a problem with the
aircraft’s charging system. Consult your aircraft’s Pilot Operating
Handbook to troubleshoot the problem. You may desire to turn off some
of the aircraft’s electrical devices which are non-essential for your particu-
lar phase(s) of flight, so that the battery will not discharge as quickly.
Appropriate alert voltage and alert delays will vary from aircraft to aircraft.
If your KLN 94 is frequently giving you this alert message, it may become
a nuisance, and you may desire to have your Honeywell Service Center
adjust the voltage alert parameters.
Chapter 5 Intermediate Operation
5-20
Figure 5-51
Figure 5-52