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Troubleshooting
Below is a collection of troubleshooting notes regarding the Orion BMS.
Problems Viewing Data in Utility
No cell voltages appear (Orion Jr. BMS)
Problems connecting to the Orion Jr. BMS unit via PC software
No cell voltages are showing in the utility
Not all cell voltages appear in live cell data
Error output is on, but no error codes are present
Problems connecting to the Orion BMS unit via PC software
Problems with CANBUS
Viewing CANBUS Communication Matrix Settings
Diagnosing CANBUS Communication Problems
Problems with Cells
Cells are not balancing, but should be
Replacing one or more cells
Internal resistance values are incorrect (by a significant amount)
High resistance cell
Problems with Charging and State of Charge
Diagnosing J1772 Charging Related Issues
CANBUS Elcon Charger isn’t charging, but should be (for standard Orion BMS)
Generic on/off charger isn’t charging, but should be (for standard Orion BMS)
Brusa charger isn’t charging but should be (for standard Orion BMS)
Eltek charger isn’t charging, but should be (for standard Orion BMS)
Charger turns off before battery pack reports full state of charge
Diagnosing sudden jumps in State of Charge (SOC)
Discharge or charge relay turns off too soon
Cell voltages drop after the charge completes
Problems with Relays
Discharge or charge relay turns off too soon
Relays don’t turn on
Problems with the Orion Jr. BMS
No cell voltages appear (Orion Jr. BMS)
Problems connecting to the Orion Jr. BMS unit via PC software
Orion Jr. BMS does not power up (LED stays off)
Problems with Voltages
No cell voltages appear (Orion Jr. BMS)
Pack voltage is reading a different voltage than measured by a voltmeter
Diagnosing sudden jumps in State of Charge (SOC)
No cell voltages are showing in the utility
Cell voltages drop after the charge completes
Not all cell voltages appear in live cell data
Cell voltages appear incorrect (when under load)
Cell voltages appear incorrect (not under load)
Trouble Codes
P0AA1 – Precharge Circuit Malfunction
Fault Code Failsafe Behavior Chart
P0A0C – Highest Cell Voltage Too High Fault
P0A0E – Lowest Cell Voltage Too Low Fault
P0A10 – Pack Too Hot Fault
P0A0F – Cell ASIC Fault
P0ACA – Charge Interlock Fault
P0A0D – Cell Voltage Over 5 Volts
P0A04 – Open Wiring Fault (or “Open Cell Voltage Fault”)
P0A03 – Pack Voltage Mismatch Error
P0A80 – Weak Cell Fault
P0A0B – Internal Software Fault
P0A0A – Internal Heatsink Thermistor Fault
P0A09 – Internal Hardware Fault
P0A12 – Cell Balancing Stuck Off
P0AC0 – Current Sensor Fault
P0A1F – Internal Cell Communication Fault
P0AFA – Low Cell Voltage Fault
P0AA6 – High Voltage Isolation Fault
P0A01 – Pack Voltage Sensor Fault
P0A02 – Weak Pack Fault
P0A81 – Fan Monitor Fault
U0100 – External Communication Fault
P0560 – Redundant Power Supply Fault
P0A05 – Input Power Supply Fault
P0A06 – Charge Limit Enforcement Fault
P0A07 – Discharge Limit Enforcement Fault
P0A08 – Charger Safety Relay Fault
P0A9C – Battery Thermistor Fault
Error output is on, but no error codes are present
Orion BMS
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Ewert Energy Systems, Inc
161 East St. Charles Rd
Carol Stream, IL 60188
Phone: (630) 868-3173
Fax: (866) 657-5667
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