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EMMA-(A01, A02)
User Manual
Table 7-2 EMMA alarm reference
Alarm
Alarm Name
ID
4000
Inverter
Communicati
on Error
4001
App
Certificate
Expired
4002
Management
System
Certificate
Expired
4003
Auxiliary
Power Fault
4004
Abnormal DI
Instruction
Issue 01 (2023-09-15)
Severity
Possible Cause
Major
The cable
connection between
EMMA and the
inverter is
abnormal.
Minor
1. The device time
is incorrectly set.
2. The certificate
has expired.
Minor
1. The device time
is incorrectly set.
2. The certificate
has expired.
Critical
The auxiliary power
supply of EMMA is
abnormal.
Major
The parameters of
active power
dispatch via DI port
are incorrectly
configured.
The DI cable
connection is
abnormal.
Copyright © Huawei Digital Power Technologies Co., Ltd.
Suggestion
1. Access the device monitoring
menu on the app and locate the
inverter experiencing abnormal
communication based on the
device status indicator.
2. Check whether the inverter is
powered on. If it is powered off,
the alarm will be automatically
cleared after it is powered on. If
it is powered on, check whether
the cable connection between
the inverter and the EMMA is
normal.
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.
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.
Contact your vendor or technical
support to replace EMMA.
Check whether the settings in the
DI signal configuration table for
active power dispatch are complete
and meet the requirements of the
local power operator. If not, correct
the settings.
Check the cable connection
between the Ripple Control device
and the inverter. Ensure that the
Ripple Control device is connected
to only one inverter.
7 Maintenance
46
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