Sma Power Injector With Bluetooth - SMA SUNNY SENSORBOX Installation Manual

Troubleshooting
11.3 SMA Power Injector with Bluetooth
Problem
Only the "RDY" LED of
the SMA Power
Injector with Bluetooth
is on.
The "RDY" LED of the
SMA Power Injector
with Bluetooth does
not light up.
The "RDY" LED of the
SMA Power Injector
with Bluetooth flashes.
The "COM" LED of
the SMA Power
Injector with Bluetooth
fails to flash.
76 Sensorbox-eng-IA-IUS-112515
Cause
The Sunny SensorBox is
not connected.
The SMA Power Injector
with Bluetooth does not
have power.
The supply voltage is too
low.
The supply voltage is
borderline.
Incorrect cabling - the
wires of the RS485
communication cable
were either inverted
during connection or not
connected at all.
Rectification
Connect one Sunny SensorBox to the SMA
Power Injector with Bluetooth.
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.
Check the alternate power source. Observe
the requirements for the alternate power
source (see page 65).
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 63).
Check the cabling.
SMA America, LLC
Installation Manual