Huawei SUN2000-250KTL Series User Manual page 91

SUN2000-(250KTL, 280KTL, 300KTL, 330KTL) Series
User Manual
Alar Alarm
m ID Name
2099 Local
Access
Certifica
te
Invalid
2100 Local
Access
Certifica
te About
to Expire
2101 Local
Access
Certifica
te
Expired
2102 Protecti
on upon
Commu
nication
Failure
2104 DC
Terminal
Tempera
ture
Abnorm
al
Issue 02 (2022-12-20)
Alarm Possible Cause
Severity
Warning Cause ID = 1
The digital signature
certificate is invalid.
Warning Cause ID = 1
The digital signature
certificate is about to
expire.
Major Cause ID = 1
The digital signature
certificate has expired.
Warning Cause ID = 1
When the communication
disconnection duration
exceeds the specified
threshold, the device starts
the protection function.
Major Cause ID = 2–7,
corresponding to MPPT1–
MPPT6
The temperature of the DC
terminal on the MPPT is
abnormal.
Copyright © Huawei Technologies Co., Ltd.
8 System Maintenance
Suggestion
Check the time or replace the digital
signature certificate.
Replace the digital signature
certificate in time.
Replace the digital signature
certificate immediately.
1. If the fault occurs occasionally, the
device recovers to the normal
state after receiving a scheduling
command. No manual
intervention is required.
2. Manually deliver a power
scheduling command.
3. If the Protection upon
Communication Failure function
is not required, disable it.
Power off the device (turn off the AC
and DC switches, and wait for a
period specified on the device safety
warning label), and check the cable
connection to the DC terminal of the
MPPT as follows:
1. Check whether the cables meet the
requirements.
2. Check whether the PV terminal
cores are crimped properly.
3. Check whether the PV terminal
models are correct.
4. Check whether PV terminals are
loosely connected.
5. If the preceding items are normal,
turn on the AC switch and DC switch,
and restart the device.
If the fault persists, contact your
dealer or technical support.
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