2.5 Communication problem
Inverter reports communication problem
Battery-Box System State under Home shows STANDBY / IDLE
Current Alarm: InverterCommError
No.
Name
Description
20
Jumper
See short instructions - please check:
SMA: only jumper JP1
KOSTAL: only jumper JP2
FRONIUS: leave both jumpers (except for variant 2, see quick guide)
GOODWE: leave both jumpers connected
21
Grounding
Connected Battery-Box directly to the ground-bus of the house. Only with a correct
grounding of the battery, a trouble-free and secure data transmission can be
guaranteed. The battery must not be earthed via the inverter! Otherwise,
communication problems are possible. Correct grounding is absolutely
necessary!
22
Communication cable
Replace the communication cable (min. CAT5!)
23
Use other communication
port (J5 instead of J2)
The BCU has two identical communication ports, labeled J2 and J5. The short
guide show the wiring at J2. If there are any communication problems, try to
connect the PINs to J5 instead.
24
Disconnect from the
network
Please check the local network and completely disconnect the system from the
network in order to exclude communication interference caused by switches or
WLAN repeaters (multicasting).
25
Restart the entire system
Generally:
- Switch off: Battery off > Inverter off
- wait at least 10 minutes!
- Switch on: inverter on > battery on
Kostal (the order is important):
- unplug Ethernet cable from inverter
- turn off the system: battery off > inverter DC switch off > AC off > unplug PV
strings
- wait at least 10 minutes
- turn on system: plug in PV strings > AC on > inverter DC switch on > battery on
- connect Ethernet cable once system is running again
2.6 Current Alarm: BatteryDiff
Error probably caused by a faulty battery extension.
No.
Name
Description
26
Battery recently
extended?
(new modules added)
If the battery system has recently been extended:
Remove the new modules from the system and follow the instruction on how to
correctly extend the system (see extension manual)
If no module extension has taken place and all modules have been installed at the
same time, please contact EFT-Systems. Please make a screenshot of the section
RUN Data on the web interface.
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