Method, device, and system for fault unit indication

1. A method for positioning a fault unit, comprising:

determining, by a controller, that a main power supply for a plurality of units is indicated to be off;

providing, by a battery module, power to the controller and a light emitting diode (LED) circuit, the LED circuit including a plurality of LEDs associated with the plurality of units;

in response to determining that the main power supply is indicated to be off, providing, by a main power supply output of the battery module, power to the plurality of units;

in response to receiving a control signal for triggering positioning, transmitting, by the battery module, a trigger signal to the controller, such that an LED of the plurality of LEDs associated with the fault unit is turned on; and

in response to receiving the control signal, transmitting, by the battery module, a main power supply off signal to the controller such that the main power supply output of the battery module is turned off, wherein the battery module continues to provide power to the controller and the LED circuit after the main power supply output of the battery module is turned off.

2. The method of claim 1 , wherein the trigger signal comprises an indication signal indicating the fault unit.

3. The method of claim 2 , further comprising:

receiving, by the battery module, the indication signal from the fault unit via the controller; and

storing the indication signal in the battery module.

4. The method of claim 1 , wherein the plurality of units are field replaceable units.

5. The method of claim 1 , wherein an LED of the plurality of LEDs is arranged adjacent to an associated unit of the plurality of units.

6. A battery module coupled to a controller and a switch, comprising:

a control module configured to:

cause the battery module to provide power to the controller and a light emitting diode (LED) circuit, the LED circuit having a plurality of LEDs associated with a plurality of units;

in response to the controller determining that the main power supply is indicated to be off, cause the battery module to provide, by a main power supply output of the battery module, power to the plurality of units;

in response to receiving a control signal from the switch for triggering positioning, transmit a trigger signal to the controller such that a LED of the plurality of LEDs associated with a fault unit is turned on, and

in response to receiving the control signal, transmit, by the battery module, a main power supply off signal to the controller such that the main power supply output of the battery module is turned off, wherein the battery module continues to provide power to the controller and the LED circuit after the main power supply output of the battery module is turned off.

7. The battery module of claim 6 , wherein the trigger signal comprises an indication signal indicating the fault unit.

8. The battery module of claim 7 , wherein the control module is further configured to:

receive the indication signal from the fault unit via the controller; and

store the indication signal in the battery module.

9. The battery module of claim 6 , wherein the plurality of units are field replaceable units.

10. The battery module of claim 6 , wherein an LED of the plurality of LEDs is arranged adjacent to an associated unit of the plurality of units.

11. The battery module of claim 6 , wherein the battery module is coupled to the switch via a first pin and to the controller via a second pin, and wherein the first and second pins are reserved pins of the battery module.

12. A system for positioning a fault unit, comprising:

a light emitting diode (LED) circuit including a plurality of LEDs associated with a plurality of units;

a controller coupled to the LED circuit;

a switch;

a main power supply switch; and

a battery module coupled to the controller and the switch and configured to:

in response to receiving a control signal from the switch for triggering positioning, provide power to the controller and the LED circuit,

in response to receiving the control signal, transmit a main power supply off signal to the controller, wherein the battery module continues to provide power to the controller and the LED circuit after the main power supply output of the battery module is turned off;

in response to receiving the control signal from the switch for triggering positioning, transmit a trigger signal to the controller,

wherein the controller is configured to:

determine that a main power supply is indicated to be off,

in response to determining that the main power supply is indicated to be off, cause the battery module to provide, by a main power supply output of the battery module, power to the plurality of units,

in response to receiving the main power supply off signal, turn off the main power supply switch, and

in response to receiving the trigger signal, transmit to the LED circuit a driving signal that indicates a fault unit of the plurality of units, such that an LED associated with the fault unit is turned on.

13. The system of claim 12 , wherein the LED circuit includes a LED driver configured to receive the driving signal and to drive the LED associated with the fault unit.

14. The system of claim 12 , wherein the trigger signal comprises an indication signal indicating the fault unit.

15. The system of claim 14 , wherein the controller is coupled to the plurality of units and configured to receive the indication signal from the fault unit and to transmit the indication signal to the battery module for storage in the battery module.

16. The system of claim 12 , wherein the plurality of units are field replaceable units.

17. The system of claim 12 , wherein an LED of the plurality of LEDs is arranged adjacent to an associated unit of the plurality of units.