SMA Sensorbox - Manual (Page 70)

Troubleshooting SMA Solar Technology AG
70 Sensorbox-IEN100914 Installation Guide
11.3 SMA Power Injector with Bluetooth
Problem Cause Rectification
Only the "RDY" LED of
the SMA Power
Injector with Bluetooth
is on. The Sunny SensorBox is
not connected. Connect one Sunny SensorBox to the SMA
Power Injector with Bluetooth.
The "RDY" LED of the
SMA Power Injector
with Bluetooth does
not light up. The SMA Power Injector
with Bluetooth does not
have power. Make sure the plug-in power supply unit of the
SMA Power Injector with Bluetooth is
connected to a power outlet or the alternate
power source is running.
Replace the defective devices.
The supply voltage is too
low. Check the alternate power source. Observe
the requirements for the alternate power
source (see page 60).
The "RDY" LED of the
SMA Power Injector
with Bluetooth flashes. The supply voltage is
borderline. Improve the power supply of the alternate
power source in one of the following ways:
• Shorten the cable.
• Use cables with a larger cross-section.
Use the plug-in power supply unit that is
provided as an accessory for the SMA Power
Injector with Bluetooth (see 58).
The "COM" LED of the
SMA Power Injector
with Bluetooth fails to
flash. Incorrect cabling - the
wires of the RS485
communication cable
were either inverted
during connection or not
connected at all. Check the cabling.