FUTABA 8UHPS Instruction Manual page 19

An alarm or error indication may appear on the display of your transmitter for several reasons,
including when the transmitter power switch is turned on, when the battery voltage is low, and
several others. Each display has a unique sound associated with it, as described below.
Warning sound: Beep beep beep beep
(repeated)
Warning sound: Beep beep beep beep beep
(repeated 3 times)
Warning sound: Beep beep beep —
(beeping does not stop until transmitter is
turned off)
Warning sound: beep beep beep beep beep
space (repeated)
(Operation when switch OFF does not stop the mixing warning)
When the warning does not stop even when the mixing switch indicated by the warning
display on the screen is turned off, the functions described above probably use the same
switch and the OFF direction setting is reversed. In short, one of the mixings described above
is not in the OFF state.
In this case, reset the warning display by pressing (+)/(-) keys simultaneously. Then change
one of the switch settings of the mixings duplicated at one switch.
The BACKUP ERROR warning occurs when the
transmitter memory is lost for any reason. If this occurs,
all of the data will be reset when the power is turned on
again.
DO NOT FLY when this message is displayed –
all programming has been erased and is not available.
Return your transmitter to Futaba for service.
The MODEL SELECTION warning is displayed
when the transmitter attempts to load a model memory
from a memory module that is not currently plugged
into the transmitter. When this occurs, model No. 01 is
automatically loaded.
Do not fly until the proper model is loaded into
memory! Reinsert the memory module, and recall the
desired setup using the model select function.
The LOW BATTERY warning is displayed when the
transmitter battery voltage drops below 8.5V.
LAND YOUR MODEL AS SOON AS POSSIBLE
BEFORE LOSS OF CONTROL DUE TO A DEAD
BATTERY.
The MIXER ALERT warning is displayed to alert
you whenever you turn on the transmitter with any of
the mixing switches active. This warning will
disappear when the offending switch or control is
deactivated. Switches for which warnings will be
issued at power-up are listed below:
HELI: Throttle cut, inverted, throttle hold, idle-up
ACRO: Throttle cut, idle-down, snap roll, airbrake
GLID: Butterfly, throttle cut, idle-down
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