eVault Max 18.5kWh Lithium Ferro Phosphate (LFP) Installation

8. TROUBLESHOOTING
8.1 GENERAL SYMPTOM-SOLUTION SITUATIONS
SYMPTOM SOLUTION
Unit voltage at terminals
is extremely low or is
bleeding down (steep
decline)
Unit’s BMS is in Protection Mode. There are two possible solutions.
1. Use a 48V charger to trickle charge the battery in order activate the BMS
2. Use the BMS-to-Computer Adapter Cable in conjunction with the BMS Tool Software
on a Windows Computer to forcibly reset the Charge/Discharge Relays. Contact
Fortress Power Tech Support.
Unit can charge/
discharge healthily
but amperage on LCD
Display is not accurate
Check amperage on cable with a Clamp Sensor. If consistent with inverter, but not
battery, use the BMS-to-Computer Adapter Cable in conjunction with the BMS Tool on
a Windows Computer to check BMS Vitals and diagnose situation. If nothing is seen,
BMS Tray may need to be taken out. Inspect Main BMS Module for improper solders or
burns. Replace if necessary. Contact Fortress Power Tech Support.
“ALARM” LED Light is on
but unit still functions
Check Inverter Settings. Use the BMS-to-Computer Adapter Cable in conjunction with
the BMS Tool on a Windows Computer to check BMS Vitals and diagnose situation.
Follow the below chart (Section 8.2) for solution
“ALARM” LED Light is on
but unit cannot function
Try to turn on unit by holding the Power Button. Use the BMS-to-Computer Adapter
Cable in conjunction with the BMS Tool on a Windows Computer to check BMS Vitals
and diagnose situation. Follow the below chart for solution. Follow the below chart
(Section 8.2) for solution
If cells are imbalanced
(upon checking with the
BMS Tool)
Open Back case and check harness connections are connected properly. Make sure all
connections have “Black” wires on the left side (regardless of orientation) and “Red” on
the right side. Check voltages of each cell (See “Measure Cell Voltages Manual”)
LCD Display went Dark
LCD Display will automatically go dark after 60 seconds of inactivity to preserve energy
consumption. If problem persists, open front case and check LCD Display connections.
Whole system (Inverter
and Battery) shut o
Check Breaker to see if tripped. Set Breaker to “O” then turn back to “On”. Reset
Battery BMS. Try to restart battery by holding down the Power Button. If problem
persists, use the BMS-to-Computer Adapter Cable in conjunction with the BMS Tool on
a Windows Computer to check BMS Vitals and diagnose situation.