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EMMA-(A01, A02)
User Manual
Alarm
Alarm Name
ID
4006
Charger
Communicati
on Error
4008
BackupBox
Communicati
on Error
4009
Management
System
Certificate
Invalid
Issue 01 (2023-09-15)
Severity
Possible Cause
The inverter does
not support the
reporting of
dispatch values on
DI ports.
The parameters of
reactive power
dispatch via DI port
are incorrectly
configured.
Major
1. The cable
connection
between EMMA
and the charger
is abnormal.
2. The home router
is faulty.
1. The EMMA
certificate is
abnormal.
2. The charger
communication
certificate is
abnormal.
Major
The cable
connection between
EMMA and the
BackupBox is
abnormal.
Minor
1. The device time
is incorrectly set.
2. The certificate
file is abnormal
or incorrect.
Copyright © Huawei Digital Power Technologies Co., Ltd.
Suggestion
Check the inverter software version.
If the inverter software does not
support the reporting of dispatch
values on DI ports, update the
inverter software.
Check whether the settings in the
DI signal configuration table for
reactive power dispatch are
complete and meet the
requirements of the local power
operator. If not, correct the settings.
1. Access the device monitoring
menu on the app and locate the
charger experiencing abnormal
communication based on the
device status indicator.
2. Check whether the charger is
powered off. If it is powered off,
the alarm will be automatically
cleared after it is powered on. If
the charger is powered on, check
whether the cable or Wi-Fi
connection to the home router is
normal.
Contact your vendor or technical
support to apply for a new
certificate file and load it.
Check the communications cable
between EMMA and the
BackupBox. If the cable is loose or
disconnected, securely connect it.
1. Check whether the device time is
incorrectly set. If yes, reset or
synchronize the system time.
2. Contact your vendor or technical
support to apply for a new
certificate file and load it.
7 Maintenance
47
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