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13. Fault Code
Fault Code Causes Methods
ER-04
Alarm for cell voltage difference: single cell voltage of the battery is
greater than or equal to the threshold.
Automatically recover; contact after-sales service center or
distributor.
ER-05
Alarm for great cell voltage difference: single cell voltage of the battery is
greater than or equal to the threshold.
Contact after-sales service center or distributor.
ER-11
Voltage protection for cell charging: the charging voltage of single cell is
greater than or equal to the threshold set by the cell overvoltage protection
valve.
Automatically recover; contact after-sales service center or
distributor.
ER-14
Voltage protection for cell discharging: the discharging voltage of single
cell is less than or equal to the threshold set by the cell undervoltage
protection valve.
Recover by recharging and turning on again; contact
after-sales service center or distributor.
ER-17
High charging temperature protection: the battery charging temperature
rise is greater than the set protection value.
Recover by turning on again; contact after-sales service
center or distributor.
ER-22
High discharging temperature protection: the battery discharging
temperature rise is greater than the set protection value.
Automatically recover; contact after-sales service center or
distributor.
ER-25
Low discharging temperature protection: the ambient temperature is lower
than the minimum protection value for battery discharge.
Recover by turning on again; contact after-sales service
center or distributor.
ER-28
Large temperature difference protection: temperature rise causes the
temperature difference between battery cells to be higher than the set
average protection value.
Automatically recover; contact after-sales service center or
distributor.
ER-29
Charging overcurrent protection: the charging current is greater than or
equal to 5A.
Recover by turning on again and discharging; contact
after-sales service center or distributor.
ER-32
Three-stage protection for discharge overcurrent: the discharge current is
greater than or equal to the set value.
Recover by turning on again and charging; contact
after-sales service center or distributor.
ER-33 Pre-charge failure protection
Turn on the switch again; contact after-sales service center
or distributor.
ER-35
Charger handshake failure protection: the charger is not matched with the
battery in information.
Reconnect and match
ER-36 Temperature sensor failure (short or open circuit)
Power on and re-detect; contact after-sales service center or
distributor.
ER-37 Voltage detection failure (open circuit of cell)
Power on and re-detect; contact after-sales service center or
distributor.
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