Huawei UPS2000-G-6KRTLL - Page 16

16
Alarm
ID
Alarm
Name
Sever
ity
Clearance
Condition
Trigger
Condition
Impact
on the
System
Suggestion
20
Lithium
battery
high
tempera
ture
protecti
on
Minor
The cell
temperatur
e drops
below the
protection
threshold.
•
Charge high
temperature
protection: The
maximum cell
temperature is
greater than
60
°C.
•
Discharge high
temperature
protection: The
maximum cell
temperature is
greater than
65
°C.
The
internal
switch
circuit of
the lithium
battery is
disconnect
ed, and
the battery
cannot be
charged or
discharged
.
Possible cause: The
ambient temperature
of the lithium battery
is too high. There are
abnormal heat sources
around the lithium
battery.
Measure: If the lithium
battery cannot be
recovered due to
protection against
abnormality, contact
local Huawei
engineers to rectify
the fault.
21
Lithium
battery
low
tempera
ture
protecti
on
Minor
The cell
temperatur
e rises
above the
protection
threshold.
•
Charge low
temperature
protection: The
minimum cell
temperature is
less than 0
°C.
•
Discharge low
temperature
protection: The
minimum cell
temperature is
less than
–20°C.
The
internal
switch
circuit of
the lithium
battery is
disconnect
ed, and
the battery
cannot be
charged or
discharged
.
Possible cause: The
ambient temperature
of the lithium battery
is too low. The heater
cannot work properly.
Measure: If the lithium
battery cannot be
recovered due to
protection against
abnormality, contact
local Huawei
engineers to rectify
the fault.
22
Lithium
battery
high
voltage
protecti
on
Minor
The cell or
battery
string
voltage
drops
below the
protection
threshold.
•
The busbar
voltage is greater
than 59.4 V in
charging state.
•
The maximum
cell voltage is
greater than 3.8
V.
•Considering cell
difference, the
maximum cell
voltage can be
3.9 V.
•
The battery
string voltage is
greater than 55
V.
The
internal
switch
circuit of
the lithium
battery is
disconnect
ed, and
the battery
cannot be
charged or
discharged
.
Possible cause: The
busbar voltage input is
abnormal and exceeds
the normal range. The
cell consistency is
abnormal. The
capacity attenuation is
too fast or the internal
resistance is too large.
Measure: If the lithium
battery cannot be
recovered due to
protection against
abnormality, contact
local Huawei
engineers to rectify
the fault.
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