ATESS BC Series User manual

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7.1 Safety instructions for inspection and maintenance
7 Maintenance
1) There is potential danger in the battery, so proper protective measures must be
taken during operation and maintenance.
2) The battery must be operated with the correct tools and protective equipment.
4) The operator may be injured by chemicals, electric shock or electric arc during
operation. Although each human body's response to DC and AC current is different,
DC or AC current with voltage higher than 50V are equally serious to human body, so
the operator must take a conservative posture in operation to avoid the current
injury.
6) In case of any abnormal problems, please contact the after-sales technical
personnel in time.
7) If you need to open the cover for maintenance (such as forced charge and
discharge of cell, replace board, etc.), please carry out with the authorization of our
engineer.
3) Battery maintenance must be carried out by people with battery expertise and
safety training.
5) When operating batteries and selecting personal protective equipment, customers
and their employees must take the above risks into account to prevent accidental
short circuit, arc, explosion or thermal runaway.
7.2 Tools to be used during maintenance
Prepare tools to be used during maintenance before operation.
Cell phone that can take photos
Multimeter
Thermometer
Pen and paper
Spanner, screwdriver etc
Thermal imager
7.3 System inspection table
Please refer to Appenx -System inspection and Maintenance Checklist in Capture 9.
When carrying out inspection, maintenance and inspection work, it is necessary to
conduct inspection one by one according to the table, and describe the
corresponding problems of the faulty items.
7.4 system inspection and maintenance record
7.4.1 Main page parameters and fault parameter records

7.4.2 The following three tables are battery standby, charging and discharging.
You can select one of them to record according to the actual situation during
the inspection.
(1) Observe the minimum and maximum values of the battery voltage, and record the
module position in the battery rack standby state:
Cell voltage Module No. Battery rack No. Serial No. of
battery cluster
Max. cell voltage
Min. cell voltage
(2) Observe the minimum and maximum values of battery voltage, and record the
module position when charging. The charging power is 100% of the rated capacity of
the inverter (if the HPS is 5kW, the charging power is set to 5kW), please ensure that the
HPS can be charged through a constant current.
Cell voltage Module No. Battery rack No. Serial No. of
battery cluster
Max. cell voltage
Min. cell voltage
(3) Observe the minimum and maximum values of the battery, and record the module
position when discharging. The discharge power is 100% of the rated capacity of the
inverter (if the HPS is 5kW, the discharge power is set to 5kW), please ensure that the
HPS can discharge through a constant current.
Cell voltage Module No. Battery rack No. Serial No. of
battery cluster
Max. cell voltage
Min. cell voltage
Note:
3. If the battery voltage is found to be too high or too low, the battery needs to be
charged or discharged under the guidance of the ATESS engineer.
1. It is recommended to run the charge / discharge test at a constant current for at least
3-5 minutes, and then record on paper.
2. "Field test battery" is the most important debugging procedure.
4. If the temperature is abnormal, the temperature sensor needs to be replaced under
the guidance of ATESS engineer.
5. If there is no available power supply to charge the battery for more than 2 weeks, it is
recommended to charge the battery forcibly.
7.5 Liability exemption
3. Damage caused by using charging equipment that does not meet the standard or
improper charging operation.
1. Damage caused by improper use, maintenance or inspection of products that not in
accordance with the provisions of this manual.
ATESS does not provide quality warranty services for:
2. Damage caused by false installation of the manual maintenance switch(CB / MCB).
4. Parts not produced by ATESS, such as high-voltage harness, etc.
5. The battery system is soaked or drown by water.
6. Damage caused by refitting, adding or disassembling battery system without
permission of after-sales department or authorized service provider of ATESS.
8. Damage caused by force majeure, such as earthquake, typhoon, flood, chemical
pollution, lightning strike, hail, sediment, flying stone, fire, or considered intentional
damage etc.
7. Damage caused by the operation failure when battery is defective without the
permission of ATESS after-sales department.
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3) Three-level fault: The battery system cuts off the main circuit relay. Inverter
shutdown
A. Observe the status of the battery module and the BPU LED lamp;
FAQ
Q. After closing the POWER SW switch, the battery system has no output.
3) If all the cabinet LED lights are on, you need to check the fault according to the
battery module and the BPU indicator.
Appendix A
Q. What should I do if the indicator light of the BPU shows the first level alarm, the
second level protection, and the third level protection?
2) Two-level fault: the battery system has no action and the inverter is standby;
4) If there is a system failure, you can first view the fault type information on the
operation data page on the inverter display, if the fault type information is viewed on
the display of the battery system.
1) If some of the cabinets are not lit, it is necessary to confirm whether the cabinet
with the last LED light is connected to the next cabinet without the LED light and the
communication line connected to all the cabinets without the LEDs is incorrect. Or
missing the connection, or even the communication line is damaged;
A, 1) Level 1 alarm: The system is running normally without any action;
2) If all the cabinets are not lit, it indicates that there is a problem with the power
supply of the system. It is necessary to check whether the power line of the rack
system is incorrectly wired or missing. If there is no error in the power wiring, then
the BPU needs to be opened to check whether the power circuit is faulty.
Common troubleshooting 8
8.1 Fault and abnormal state processing

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8.2 Annex B
The system has the following second and third level fault information description
Fault level Fault description Remarks
Adjustable
Adjustable
Adjustable
Adjustable
Adjustable
To be determined
To be determined
To be determined
Adjustable
Adjustable
Adjustable
Adjustable
Adjustable
High secondary charging temperature
High secondary discharge temperature
Low secondary charging temperature
Low secondary discharge temperature
Large temperature difference between the
two cells
High secondary total voltage
Low secondary total voltage
Large total voltage difference between the
two stages
High secondary cell voltage
Low secondary cell voltage
Large voltage difference between the two cells
Large secondary charge current
Large secondary discharge current
Secondary
fault
Fault level Fault description Remarks
Adjustable
Adjustable
Adjustable
Adjustable
Adjustable
Adjustable
Adjustable
To be determined
To be determined
To be determined
Adjustable
Adjustable
Adjustable
Three-level charging temperature is high
Three-level discharge temperature is high
High temperature protection recovery value
Three-level charging temperature is low
Three-level discharge temperature is low
Low temperature protection recovery value
Three-level of temperature difference
High three-level total voltage
Low three-level total voltage
Three-level total voltage difference
High level three-level voltage
Low level three-level voltage
Three-level charging current is large
Tertiary fault
Adjustable
Adjustable
Three-level discharge current is large
Tertiary fault

Annex
9
No.
1
2
3
4
5
Category Circuit breaker
maintenance
Software diagnostics
Check item Software version System alarm Whether circuit breaker(CB) of DC
cabinet in parallel system trips
Whether DC Micro breaker(MCB) of
BPU trips
Check method Visual inspection Visual inspection BMS data reading
or screen
BMS data reading
or screen
Battery consistency Whether the indoor or container
ambient temperature is 20  ~ 40
 , and whether the temperature
c o n t r o l e q u i p m e n t i s i n g o o d
condition
BMS data reading
or screen
Standard CB all connected MCB all connected Record the
software version
No alarm in the
alarm bar
The static
differential
pressure shall be
within 20mV
Thermometer 20 ~30
6
Result
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Problem
description Check frequency
Once two weeks
Whether the temperature of
battery module is normal, and
whether the maximum temperature
difference between modules is less
than 5 ℃
7
BMS data reading
or screen <5℃Normal
Abnormal
Whether the voltage of each cell
in the system is normal, and
whether the maximum voltage
difference between each battery is
less than 100mV
BMS data reading
or screen <100mV Normal
Abnormal
8
System operation
status and
environment
No.
10
11
12
13
Category
System cleaning
Check item Check the fault page of the display
and check whether the battery system
reports abnormal information
Status of the air condition in container
Check method
Visual inspection,
thermometer
Smell
DC cable connection between
battery boxes
Standard No fault record 25±3 No abnormal
sound or smell
No water leakage
or foreign matters
Visual inspection
/thermometer
14
C o m m u n i c a t i o n c o n n e c t i o n
between battery boxes
15 Visual inspection
/BMS fault record
No CAN
communication
fault
External power supply input
connection of high voltage box Visual inspection,
recommended to
take pictures
AC circuit breaker
remains closed
16
Circuit connection
BMS data reading
or screen
9
Whether the battery module and
battery rack have abnormal sound
or smell
Is there water leakage or other
foreign matter in the room or
container
Visual inspection
Whether there are rodents and
insects such as mice, geckos,
cockroaches and ants in the room Visual inspection No animals or
insects
No obvious
heating
or temperature
below 70 ℃
Battery rack ground connection Visual inspection,
multimeter
<=4Ω
17
Result
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Problem
description Check frequency
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
System inspection and Maintenance Checklist
Once two weeks Once two weeks Once two weeks Once two weeks Once two weeks

No.
18
19
20
21
Category Circuit breaker
maintenance
Fan maintenance and
replacement
Check item Check whether the power cable plug
is loose or not tightened, and
whether the power cord surface is
damaged
C h e c k w h e t h e r t h e p l u g o f
communication cable is loose or
not tightened, and whether the
surface of communication cable is
broken
Check method
I f t h e f a n h a s a n y a b n o r m a l
condition, it shall be replaced in time
Standard No damage No crack on blade
22
Result
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Problem
description Check frequency
Is the indoor or container lighting
system in good condition
23 Normal
Abnormal
Is there any fault in the DC cabinet or
BPU in the parallel system or the red
light flashes
Normal
Abnormal
24
System operation
status and
environment
Visual inspection
Listen to whether there is abnormal
vibration sound when the fan is
running
Hear,spanner,
screwdriver, etc
Visual inspection Visual inspection No loose or
fracture
Check the fan blades for cracks
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Fire f ighting f a c i l i t i e s in g o o d
condition Visual inspection
Visual inspection Visual inspection Visual inspection
No abnormal
sound
No abnormality Normal lighting No red light
flashing in fault
record
Fire fighting
facilities not
expired
Normal
Abnormal
Once two weeks Once two weeks Once two weeks