How do I fix Bus Sample Fault on a Growatt?

Power cycle inverter. Check DC input voltage is within range before restarting Then: Update firmware via ShineServer if update is available

Growatt

Error 404

Bus Sample Fault

Internal DC bus voltage measurement circuit has detected an error.

Common causes

Internal hardware or firmware issueVoltage spike on DC bus

What to check

STEP 1

Power cycle inverter. Check DC input voltage is within range before restarting

STEP 2

Update firmware via ShineServer if update is available

Escalate if

Fault persists after power cycle and firmware is current — internal hardware fault, escalate

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