APsystems ECU-3 V4 Installation/User Manual
15
Basic Operation
Troubleshooting
Potential Problems and Solutions
IP Address Problem:
If the lan IP address displayed on the ECU’s LCD does not match
the subnet on your internal network and shows “192.168.131.228”,
it means that it was unsuccessful in obtaining a DHCP IP address
from your router.
Check network connectivity to the router or other
DHCP server. You may need to contact your Internet
Service Provider or refer to your router documentation
for troubleshooting assistance.
LCD Displays “-W”:
The ECU could not connect to the APsystems website.
Check network connectivity to the router. You may
need to contact your Internet Service Provider or refer
to your router documentation for troubleshooting
assistance.
the communication between microinverter and ECU is
abnormal. Check the communication of microinverter
and ECU.
LCD Display “!”:
The number of installed units doesn’t match the microinverter-count.
This may indicate that the ECU is having difficulty communicating
over the power lines. It could also be caused by low light levels,
resulting in module voltage that is too low for the microinverter to
power up.
Figure 22
Plug the ECU into an electrical socket in a different
location. Keep it away from your router.
L: 192.168.1.101
+W
750W 11.54kWh 012!
