BendixKing KLN 94 - Pilots Guide - Manual (Page 230)

Internal Battery Low:
Service Required to
Prevent Data Loss— This message appears when the KLN 94’s internal
battery is low and needs replacing at an authorized Bendix/King service
center. The battery should be replaced within a week to prevent the loss
of all user-defined data including waypoint, airport remarks, flight plans,
etc. Typical battery life is approximately three to five years.
Low Bus Voltage
Check Charging System — This message appears when the voltage on
the aircraft power bus drops below the alert voltage for longer than the
alert delay time. Both the alert voltage and alert delay time are displayed
on the SET 9 page and set at the time of KLN 94 installation. In addition,
the SET 9 page displays the present power bus voltage. This message
may be indicative of a problem with the aircraft’s charging system.
Consult your aircraft’s Pilot Operating Handbook to troubleshoot the prob-
lem. You may desire to turn off some of the aircraft’s electrical devices
which are non-essential for your particular phase(s) of flight, so that the
battery will not discharge as quickly.
Magnetic Var for Published
Approach Being Used -This message appears when a user-defined
magnetic variation has been selected on the SET 2 page and an
approach waypoint is active. The KLN 94 will use the magnetic variation
association with the approach waypoint.
Magnetic Var Invalid
Nav Data Referenced
To True North - This message appears when the magnetic variation is
invalid due to operation outside of the database magnetic variation area
without having a pilot-entered magnetic variation. See section 5.16.
Mag Var for Published
VOR Being Used - This message appears when a user-defined magnetic
variation has been selected on the SET 2 page; the unit is in OBS mode:
and the active waypoint is a VOR. In this case, the magnetic variation
associated with the VOR station will be used.
MSG Annunciator Fail — This message appears when there is a failure
of the KLN 94 external MSG annunciator drive circuitry. To determine if
there are any messages to be viewed you will need to look at the internal
KLN 94 message display because the annunciator will not be working if
this message has been given. Service the KLN 94 as soon as possible.
Nav Data Referenced
To True North - This message appears when a user-defined magnetic
variation of 0 degrees is being used for navigation data.
Appendix B Message Page Messages
B-4