Rev. D January 27, 2020
14
Manual Number 9018252
SECTION 4
OPERATION
4.1
FRONT PANEL CONTROLS AND ANNUNCIATIONS
4.1.1
CONTROLS
BATT/HEAT
There are 2 different TB17 battery modes of operation that will determine
actions when the BATT/HEAT momentary switch is depressed (see Manual
Number 9018047, section 4.3 that describes Sleep and Active mode of
TB17):
When the TB17 battery is in
sleep mode, pressing the BATT/HEAT
momentary switch lights all annunciations as depicted in Figure 5, which
includes MAIN BATTERY, TEMP, FAULT, BATT/HEAT button, CHARGING
and HEATING for at least 3 seconds or until the button is released
When the TB17 battery is in
active mode, pressing the BATT/HEAT
momentary switch lights all annunciations as depicted in Figure 5, which
includes MAIN BATTERY, TEMP, FAULT, BATT/HEAT button, CHARGING
and HEATING until the button is released
BATT/HEAT button is white backlit. Refer to the installation manual and operating
instructions of the TB17 for additional operational and functional interface details.
4.1.2
ANNUNCIATIONS
MAIN BATTERY (WHITE)
Lit when any of the annunciations are ON.
TEMP
(RED)
Lit when over temperature sensed on battery. Land as
soon as practical and present the battery for
maintenance evaluation.
FAULT
(AMBER)
Blinking - when battery has experienced a recoverable
fault. Steady - when battery has experienced a non-
recoverable fault. For steady light, present battery for
maintenance evaluation upon landing.
CHARGING
(WHITE)
Lit when battery is charging. If battery is used as an
emergency power source, it is recommended flight not
be initiated until CHARGING is no longer displayed,
indicating a state of charge greater than 95%.
BATT/HEAT
(WHITE)
Lit when panel lighting input is high (pin 17) and unit is
connected to Battery 1 (pin 11), Battery 2 (pin 12),
and/or aircraft power (pin 13).
HEATING
(WHITE)
Lit when battery heater is activated due to unit
temperature below 10°C and battery is in active state. It
is recommended that an engine start not occur until the
HEATING annunciation turns off.
FIGURE 7
FRONT PANEL