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If the STATUS LED is flashing RED, this means the BMS has disconnected the battery because of some
Protection/issue and has gone into one of the following error states shown in Table 5-1 on page 16.
The issue is shown by the number # of flashes of the RED LED on the battery as follows (and
described on the remote Monitoring Screen).
# Flashes
Description of Protection
of red LED
0
Normal State
2
Low Voltage Disconnect (LVD)
CUV: Cell Under Voltage
Battery empty
3
BMS too hot
4
Battery too cold
(UTD: Under Temperature Discharge.)
5
Battery too hot
(OTD: Over Temperature Discharge.)
6
Short Circuit
(Load current > 1000A for 70µs)
7
Surge Overload
(Load current > 500A for 1 second)
8
Over Current
9
Communications issue
10
Voltage Reading Mismatch (cells vs
pack)
Apply the appropriate remedy as above – usually by pressing the power button off and on again, or
by pressing Enter on the Monitoring Screen.
Low Voltage Disconnect
The most common situation is #2 where the battery has been drained to empty and the Low Voltage
Disconnect (LVD) has occurred – in this case you should do the following:
MED HP Batteries – Installation & User Guide
Table 6-1 BMS Status Light Diagnostics
16
Installation & User Guide
HP Batteries; Medium Size
Result
-
Loads Disconnected
Loads & Charge
Disconnected
Loads Disconnected
Loads Disconnected
Screen readings
incorrect
Loads & Charge
Disconnected
Action Required
None
Connect charger;
Screen: Enter button, or
Battery: Power Button
Reduce temperature;
wait to recover
Increase/Reduce
Temperature; wait to
recover
Screen: Enter button, or
Battery: Power Button
Battery: Shutdown, then
Start button
Battery: Shutdown, then
Start button
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