OKAI ES400A - Battery Error Code Declare and Solution

25
27E
The BMS heartbeat fault
The meter hasn't detect the BMS heartbeat for more than 5 minutes.
⚫ Check if the connection of the battery is loose.
⚫ Change the battery.
28E
Illegal IoT or ECU
Authentication match between the IoT and the ECU failed.
⚫ Change the IoT.
⚫ Change the ECU.
Battery Error Code Declare and Solution
Error
code
Error name
Error cause
The solution
E01
Failed to communicate with protection chip
protection chip damaged
⚫ Do not connect the power supply and let the load
stand for 3 minutes.
⚫ If it cannot be eliminated, please scrap it.
hardware of communication bus damaged
E02
Metering device damage
Hardware failed
⚫ Press the switch for 15 seconds to start the restart
function. If it cannot be eliminated, please scrap it.
E03
Flash chip damaged
Hardware failed
⚫ Please scrap disposal.
E04
Drop event
Free fall detected
⚫ Do not connect the power supply and let the load
stand for 3 minutes.
⚫ If it cannot be eliminated, please scrap it.
E05
Charge MOSFET damage
Current sensor damaged
⚫ Please scrap disposal.
MOSFET damaged
E06
Discharge MOSFET damage
Current sensor damaged
⚫ Please scrap disposal.
MOSFET damaged
E07
MCU ROM damage
Hardware failed
⚫ Please scrap disposal.
E08
MCU RAM damage
Hardware failed
⚫ Please scrap disposal.
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