Inverter Parallel Communication Alarm

Communication failure between paralleled inverters in a parallel system configuration. Displayed fault ID: 075.

Common causes

Loose or damaged parallel communication cableIncorrect wiring of parallel COM port

What to check

STEP 1

Inspect parallel communication cable and terminal connections. Ensure cable is securely connected at both inverter COM ports.

STEP 2

Reconnect the communication cable firmly.

Escalate if

Cable confirmed intact but alarm persists — contact Sungrow support

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