Sma SUNNY BOY User Manual download pdf (Page 38)

Measurement Channels and Messages SMA Solar Technology AG

38 SB_SMC-BEN092840 User Manual

Rechner /

MSD-Timeout

Functional fault in one of the two microcontrollers.

Corrective measures

• Please contact your installer or the SMA Solar Technology

Serviceline when this problem occurs several times in succession.

Relais 1

Relais 2

Relais 3

Relais 4

A grid relay is faulty. The inverter checks the relays connecting it to the

grid before feeding power into the grid. If the grid relays do not function

properly, the inverter does not connect to the grid for safety reasons.

Corrective measures

• If this fault message is displayed repeatedly, it means that inverter

operation is permanently disabled. If the inverter is equipped with

a communication interface, the installer can try to rectify the fault

with the help of a communication product.

• Should this be unsuccessful, please contact the SMA Solar

Technology Serviceline.

REL_INV_CLOSE

REL_GRID_CLOSE

A grid relay does not close. The inverter checks the relays connecting it

to the grid before feeding power into the grid. If the grid relays do not

function properly, the inverter does not connect to the grid for safety

reasons.

Corrective measures

• If this fault message is displayed repeatedly, it means that inverter

operation is permanently disabled. If the inverter is equipped with

a communication interface, the installer can try to rectify the fault

with the help of a communication product.

• Should this be unsuccessful, please contact the SMA Solar

Technology Serviceline.

REL_INV_OPEN

REL_GRID_OPEN

A grid relay does not open. The inverter checks the relays connecting it

to the grid before feeding power into the grid. If the grid relays do not

function properly, the inverter does not connect to the grid for safety

reasons.

Corrective measures

• If this fault message is displayed repeatedly, it means that inverter

operation is permanently disabled. If the inverter is equipped with

a communication interface, the installer can try to rectify the fault

with the help of a communication product.

• Should this be unsuccessful, please contact the SMA Solar

Technology Serviceline.

Message Description and corrective measure

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