| State | LED | Color/Behavior | Description | Actions |
|---|---|---|---|---|
| Battery is fully charged. | Battery status LED |
Green, steady.
|
DC power is available. SoC = 100 %. Charging is stopped or in float mode. | – |
| Device status LED |
Green, blinking.
|
|||
| Battery is charging (DC in connected). 1 | Battery status LED |
Green, all 3 LED indicators are blinking.
|
Battery is low. SoC < 40 %. | – |
|
Green, 2/3 of LED indicators are blinking.
|
SoC = 40 … 70 % | |||
|
Green, 1/3 of LED indicators is blinking.
|
SoC = 70 … 100 % | |||
| Device status LED |
Green, blinking.
|
– | ||
| Battery is functional but discharging. | Battery status LED |
Blank.
|
Battery status is OK but there is no DC power available and the system is running on batteries. Battery LEDs are powered off to save power. | – |
| Device status LED |
Green, blinking.
|
|||
| Battery fault, DC power is unavailable. | Battery status LED |
Blank.
|
System has detected a serious battery failure in one of the batteries. |
|
| Device status LED |
Yellow, blinking.
|
|||
| Safe input current limit is exceeded. | Battery status LED | Displays the last probed battery status. | If the input current exceeds 9.5 A for 30 seconds, the output power is temporarily disabled for 2 minutes. | – |
| Device status LED |
Yellow, steady.
|
|||
| Battery is overheated. | Battery status LED |
Red, steady. 2
|
Battery temperature sensing resistor (NTC) has detected an excessive operating temperature. Battery charging is temporarily paused until the battery temperature is within operational limits again. |
– |
| Device status LED |
Yellow, blinking.
|
|||
| Rotary switch is in unsupported position. | Battery status LED |
Blank.
|
BMU801 is booted with the rotary switch in an unsupported position. | Correct the rotary switch position. To confirm the switch position, reboot BMU801 or reset the battery. |
| Device status LED |
Red, blinking.
|
|||
| BMU801 malfunction. | Battery status LED |
Blank.
|
BMU801 is malfunctioning. This state may appear during boot or operation. | Replace BMU801. |
| Device status LED |
Red, steady.
|
| Action | LED | Color/Behavior | Description |
|---|---|---|---|
| To switch on BMU801, long press the Power/Test button. | Device status LED | Green steady, and then blank after a short timeout. When the Power/Test button is released, the LED switches to blinking green after a short timeout. | – |
| Battery status LED |
|
First the LEDs display the current SoC. If there is no DC power available, the LEDs go into power saving mode (all 3 LED indicators blank). | |
|
To check the battery status, short press the Power/Test button. If no DC power is available, the battery status LEDs are powered off to save power. The LEDs display the battery status indication for 5 seconds and return to previous state after that. |
Battery status LED | Green, all 3 LEDs. | Battery is full. SoC = 100 % |
| Green, 2/3 of the LEDs. | SoC = 70 … 100 % | ||
| Green, 1/3 of the LEDs. | SoC = 40 … 70 % | ||
| Yellow, 1/3 of the LEDs. | SoC = 10 … 40 % | ||
| Yellow, 1/3 of the LEDs blinking. | SoC = 0 … 10 %. System shutdown soon. | ||
| Red, 1/3 of the LEDs. | SoC = 0 %. Battery is disconnected. 3 | ||
| Red, blinking, all 3 LEDs. | Battery fault. Battery is disconnected. 3 | ||
| To switch off the unit, long press the Power/Test button. | Device status LED | Green blinking, and then blank. | When you press the Power/Test button long and the power is on, you are first warned of the shutdown with a blinking green LED. After a short timeout, the LED turns blank. 4 |
| Battery status LED | Blank, all 3 LEDs. | Power is off. | |
| To reset the battery SoC counter, press the Reset button. | Device status LED | Yellow, steady, until the battery probing has completed. | After the probing has completed, the device status LED displays the current device status. |
| Battery status LED |
|
First the battery LED displays an animation for approx. 1 minute, where the 3 LED indicators are blinking yellow one at a time. Then the LED displays the current SoC. If there is no DC power available, the LED goes into power saving mode (all 3 LED indicators blank). 5 |
1 If solar panel (Solar 1 or Solar 2) is connected, the battery status LEDs are blank and the device status LED is
blinking green.
2 Displayed in both battery LEDs,
even though only one of the batteries would be overheated.
3 If there are
2 batteries, the system can operate with one battery even if the other one is
disconnected.
4 If you release the button before the "long press time"
(4 seconds), BMU801 will continue operation.
5 The animation is displayed in both
battery LEDs.