SMA 485 Data Module - Manual (Page 20)

7 Troubleshooting SMA Solar Technology AG
20 485i-Module-IA-en-18 Installation Manual
7 Troubleshooting
The emergency channel list "Emergncy"
or "EmgncyXX" is displayed in the
communication product
(e. g. Sunny WebBox, Sunny Explorer).
The inverter is displayed by device class
"Other" in the Sunny Portal. The 485 Data Module is installed in an inverter without
first disconnecting the inverter on the AC and DC sides.
That prevents the inverter detecting the new 485 Data
Module.
Corrective measures:
Several SMA communication products query data
simultaneously from the devices via Bluetooth
(e.g. Sunny Explorer, Sunny Beam with Bluetooth) and
RS485 communication (e.g. Sunny WebBox).
This can cause data congestion if a lot of data is
transmitted simultaneously. If this condition lasts for more
than five minutes, the inverter resets the 485 Data
Module. Due to the data congestion, the inverter cannot
detect the 485 Data Module after the reset.
Corrective measures:
Problem Cause and corrective measures
• Prior to performing any work on the inverter,
disconnect the inverter from any voltage sources on
the AC and DC sides (see inverter installation
manual).
• Wait until the inverter restarts the next morning,
then the inverter will detect the 485 Data Module.
or
Disconnect the inverter from voltage sources on the
AC and DC sides and recommission it
(see the inverter installation manual).