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USER’S GUIDE
battery management system
11
Loss of System Power. The Battery Management System is not powered.
Sensor Input Fault. Minor Alarm. The number of sensors the BMS detects
does not match the number of battery strings.
Possible Causes Corrective Action
Power leads are swapped
or backwards
• Reverse the power leads.
Power leads are not
connected to a power
source
• Connect the Battery Management System to a power
source.
Blown power lead fuse • Check the Battery wire harness for pinched or frayed
wires.
• Replace the fuse. Monitor the Battery Management
System for more blown power lead fuses, as this is a sign
of an internal problem with the Battery Management
System.
Possible Causes Corrective Action
Current sensor is not
installed on each battery
string.
• Install a current sensor for each battery string connected
to the Battery Management System.
Current sensors not
correctly addressed.
• Check DIP switch settings for each current sensor. String
A’s sensor should have DIP switch #1 set to On (all
others Off), and String B’s sensor should have DIP
switch #2 set to On (all others Off).
Ambient temperature
sensor missing
• Install an ambient temperature sensor in the open port on
one of the current sensors.
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