Futaba 4PKS 2.4GHz - Manual (Page 126)

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Warning Displays
Low Battery Alarm
If the transmitter battery voltage drops to 4.9V(when using dry cell battery: 4.1V) or
less, an audible alarm will sound and "LOW BATTERY" will be displayed on the LCD
screen.
LCD screen: Audible alarm:
Continuous tone.
The vibrator:
Active (initial setting) page 116
ｎ Warning
ｊ When a low battery alarm is generated, cease operation immediately and retrieve the
model.
If the battery goes dead while in operation, you will lose control.
Power supply and low battery alarm
Dry cell batteries (alkaline batteries are recommended) can be used with the optional
battery box. However, when using dry cell batteries, set BATT-TYPE in the system
menu to DRY 4CELL. When BATT-TYPE is set to DRY 4CELL. When using the T4PK
standard HT5F1700B battery, always set BATT-TYP to NiMH5 LeFe2. (See page 110,
for a detailed description of the battery types.)
Backup Error
If the data is lost for an unknown reason, an audible alarm will sound and "BACK UP
ERROR" will be displayed on the LCD screen.
LCD screen: Audible alarm:
Tone will sound (9 times), then repeat.
ｎ Warning
ｊ When a backup error is generated, immediately stop using the system and request
repair from the Futaba Service Center.
If you continue to use the system, the transmitter may malfunction and cause loss of control