1
Identify the pattern fully
All Solterra tri-colour fault codes begin with red or green. Count the full sequence before it repeats, then match it to LED Fault Codes.
Red or green first -> count the full loop
Issue-Specific Guide
Fault Pattern Is Showing
Use this path when the charger is actively showing a repeated fault blink pattern.
Before escalating, use the universal reset once: disconnect AC power for 30 seconds,
confirm the LEDs are fully off, then reconnect.
Quick Pre-Checks
Run these quick checks before you assume the charger has a deeper hardware fault.
AC socket is energised. Test it with another appliance.
AC plug is fully inserted, undamaged, and its pins are clean and straight.
DC output connector is fully locked into the vehicle inlet, not just inserted.
Both AC and DC cables are free of cuts, kinks, crushing damage, or severe bending.
Charger vents are unobstructed and have at least 10 cm clearance on all sides.
Ambient temperature is below 45 C.
No extension cord is being used, or the cord is correctly rated and within the allowed length.
Universal reset has been tried: AC off for 30 seconds, then reconnect.
Step-by-Step Field Checks
Follow the steps in order. Stop and escalate as soon as a step says the issue is not field-serviceable.
2
External or field-check faults
AC-side faults point to supply voltage, frequency, or plug contact issues. DC-side faults point to connector seating, harness continuity, battery voltage, or BMS protection state.
AC-side = check AC | DC-side = check DC and battery side
3
Battery-side faults
Battery under-voltage and precharge timeout both require direct pack checks. Measure pack voltage, confirm harness continuity, and move to Activation if the battery is deeply discharged.
Measure pack voltage directly
4
Thermal faults
Move the charger to a cooler, ventilated space, clear vents, and allow at least 20 minutes of cool-down before retrying.
Cool 20 min, clear vents, improve airflow
5
Output relay fault is critical
Relay fault means the internal output safety path is compromised. The charger may not be able to disconnect safely from the battery.
Relay fault -> stop use immediately and contact service
6
If an internal fault repeats after one reset
For internal faults like F01 or F03, you may perform one full AC-and-battery reset. If the fault returns, remove the charger from service.
Repeated internal fault -> do not keep retrying in the field
If the charger shows a fault pattern at any point, cross-check the LED sequence on the
LED Fault Codes page before retrying power cycles.
Internal Links
Continue the Investigation
Keep moving between the support guides below to narrow the issue faster.
Related Page
LED Fault Codes
Review Solterra LED fault codes, match blink patterns, and use the interactive simulator and reference table.
Related Page
Step-by-Step Troubleshooting
Pick a symptom and follow the correct field checks before escalating to service.
Related Page
Activation / Wakeup Function
See how Solterra chargers wake deeply discharged batteries and what risks apply during activation.