1
Treat these as immediate stop-use faults
Relay fault, relay circuit fault, PFC internal fault, DC internal fault, and repeated internal faults are safety-critical.
Stop use immediately
Remove the charger from service
Issue-Specific Guide
Relay Fault Or Internal Fault
Use this path for relay faults, PFC internal faults, DC internal faults, and any repeated internal charger errors.
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
One reset is the maximum for internal faults
For non-relay internal faults, you may disconnect AC and battery for 30 seconds and retry once. If the fault returns, the unit must not stay in field service.
At most one full AC + DC reset
3
Do not try to clear a relay fault
Relay faults indicate the output path safety function may be compromised. Continued operation may leave the charger unable to disconnect from the battery properly.
Relay fault -> no field reset, contact service immediately
4
Never open or bypass the charger
These are not field-repairable faults. Opening, bypassing, or attempting a workaround creates direct safety risk and can void warranty.
Do not service internally 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.