2.4 BMU/BMS LED event code (EC)
A constant white LED refers to standby mode. White blinking means charge or discharge.
When the battery is initiating, the LED will flash white and blue with an interval time of 0.5 seconds (normal during startup).
When the LED flashes blue with an interval time of 1 second it indicates an event code. We start to count when the white LED
begins to flash, then we count how many times white and blue LED flashes. (also refer to the manual!)
Example: 1xwhite, 6xblue
→
EC 106 / 1xwhite, 11xblue
→
EC 111 / 3xwhite, 3xblue
→
EC 303
Most Errors come from a faulty communication line, incorrect app configuration or missing restart after app-configuration.
Please go in detail through: Section 1, 2.2 & 2.3
Note: if the system is not correctly configured with the app, the event code (EC) might be misleading.
Note: every LVL has its own BMS. The Event Code of the BMS will therefore be shown in the LED of the individual LVL.
7
EC
BMU
EC
BMS
Measure
EC 101
all
- Update the Parameter Table to the latest version using BCP (section 2.5)
- Download all data with BCP (especially the historical data) (section 2.5)
If problem remains: replace BMU, if available
EC 102
EC 105
all
- Make sure app-configuration has been completed correctly (especially module quantity!).
- Check terminal resistor
- Replace communication cable between Battery and BMU
- Restart system according to manual. (note: to properly shut down you need to press the
button on BMU for 5 seconds. Make sure to start the battery before starting the inverter!)
- Download all data with BCP (especially the historical data) (section 2.5)
- If multiple LVL batteries are in the system, check if the system works when removing the
suspected LVL, or try the batteries one by one with the BMU to identify if the system works
If problem remains: replace BMU, if available
EC 103
EC 108
- Check DC cabling and make sure that the Minimum Configuration is met.
- Check the voltage of the batteries with BCP according to section 2.5 / 2.6
- Restart system properly (see Step 20, section 2.2; especially make sure that fuse
between battery and inverter is closed, if there is a fuse)
- Download all data with BCP (especially the historical and cell data) (section 2.5)
- Check if the system works when removing the LVL with the EC108 (see section 2.8)
- provide the SN and voltage of the LVL with the EC (see checklist on last page)
EC 104
EC 101
- Check DC cabling (is there any short circuit? Fuse between battery and inverter closed?)
- Disconnect the battery system from the inverter and restart the battery system alone
(battery isolated), to evaluate if the error is being caused externally (i.e. short circuit in
inverter or mppt). If the Event Code remains, the error might be in the battery. If the Event
Code has changed, there might be an error in the inverter side.
- Download all data with BCP (especially the historical and cell data) (section 2.5)
- Check if the system works when removing the LVL with the EC 101 (see section 2.8)
- provide the SN and voltage of all LVLs with the EC (see checklist on last page)
