Checking The Function Of The Rapid Shutdown System - SMA RSC-1X-US-10 Installation Manual

SMA Solar Technology America LLC
8

Checking the Function of the Rapid Shutdown System

The Rapid Shutdown System is supplied via the PV array. If there is insufficient irradiation on the PV
array, the supply voltage of the Rapid Shutdown System is too low and the function of the Rapid
Shutdown System is not able to be checked.
Requirement:
☐ The Rapid Shutdown System must be commissioned.
☐ There must be sufficient irradiation on the PV array.
Procedure:
1. Press the emergency switch on the Rapid Shutdown Controller. This starts the automatic self-test
of the Rapid Shutdown Box and activates the Rapid Shutdown System.
☑ The red LED on the Rapid Shutdown Controller lights briefly or flashes. The Rapid
Shutdown Box reduces the voltage on the output string side. As soon as the voltage is
within the permitted range, the green LED on the Rapid Shutdown Controller glows
constantly.
☑ The green LED on the Rapid Shutdown Controller glows constantly. The Rapid Shutdown
System is active and the voltages on the output string side of the Rapid Shutdown Box are
≤30 V.
✖ None of the LEDs on the Rapid Shutdown Controller are glowing?
Several causes are possible: Either the irradiation on the PV array is too low and, thus,
the supply voltage of the Rapid Shutdown System insufficient or the installation of the
Rapid Shutdown System is faulty or the Rapid Shutdown Box is defective.
• Make sure that the supply voltage of the Rapid Shutdown System is sufficient.
• Ensure that the Rapid Shutdown System is installed correctly.
• When the Rapid Shutdown System has enough supply voltage and is installed
correctly and still none of the LEDs are glowing, the Rapid Shutdown Box is faulty
and must be replaced. Contact the Service (see Section 12 "Contact", page 42).
✖ The red LED on the Rapid Shutdown Controller glows constantly?
The Rapid Shutdown Box is defective and the Rapid Shutdown System is not active.
• Contact the Service (see Section 12 "Contact", page 42).
2. Reset the Rapid Shutdown function (see Section 9.2, page 36).
Installation Manual
8 Checking the Function of the Rapid Shutdown System
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