SMA STP 33-US-41 - LED Signals

3 Product Overview
SMA Solar Technology AG
User Manual STP33-62-US-41-BA-en-11 19
Surge arrester type 1 and 2
On the AC and DC side, the inverter is equipped with slots for type 1 and 2 surge protection
devices. The surge protection devices limit dangerous overvoltages. The surge protection devices
can be retrofitted.
Arc-Fault Circuit Interrupter (AFCI)
In accordance with the National Electrical Code
®
, the inverter has a system for DC arc fault
detection and interruption. The arc-fault circuit interrupter is listed in accordance with UL 1699B
Ed.1. A detected electric arc causes the inverter to interrupt feed-in operation. To restart the feed-in
operation, the resulting operation inhibition must be reset. Alternatively, the arc-fault circuit
interrupter can be activated without inhibiting operation. Depending on the country data set, arc
fault detection is activated or deactivated by default. If the installation conditions allow it, you can
change the default setting.
SMA Smart Connected
SMA Smart Connected is the free monitoring of the product via the SMA SunnyPortal. Thanks to
SMA Smart Connected, the operator and qualified person will be informed automatically and
proactively about product events that occur.
SMA Smart Connected is activated during registration in SunnyPortal. In order to use SMA Smart
Connected, it is necessary that the product is permanently connected to SunnyPortal and the data
of the operator and qualified person is stored in SunnyPortal and up-to-date.
Universal mounting system (UMS_Kit-10)
The universal mounting system enables wall mounting of the inverter or serves as platform for higher
mounting on the ground. The universal mounting system is available as an accessory.
3.4 LED Signals
The LEDs indicate the operating state of the product.
LED signal Explanation
The green LED is flashing
(twoseconds on and
twoseconds off)
Waiting for feed-in conditions
The conditions for feed-in operation are not yet met. As soon as the
conditions are met, the inverter will start feed-in operation.
The green LED is flashing
(1.5s on and 0.5s off)
Backup operation
The backup operation function is activated and the inverter supplies
the loads with energy from the battery.
The green LED flashes
quickly
Update of central processing unit
The central processing unit of the inverter is being updated.
The green LED is glowing Feed-in operation
The inverter feeds in with a power of at least 90%.