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Table 11.2-4 Troubleshooting list
Fault type
Cause
Ground insulation is poor or the environment is
Insulation impedance alarm
damp.
The power supply line of the display screen is
The LCD screen cannot start
loose. The communication cable is wrongly
up or work
connected or loose.
Dynamic
dropout
voltage:
Copper strip of battery connection is loose or
when discharging a single cell,
the welding nickel strip is weak. Self-discharge
a relatively great difference of
of the cell is over discharge, and differences
dropout voltages
exist between the capacity of other cells.
SHENZHEN CENTER POWER TECH CO., LTD
Address: Rooms 9-12, 7F, Block B, Building 7, Zone 2, Shenzhen Bay Technological and
Ecological Park, Nanshan District, Shenzhen, China
Tel: 0755-66851118 Fax: 0755-66850678 Email: sales@vision-batt.com
Process mode
1、Check the insulation impedance protection parameters setting through
LCD or VISION APP;
2、Check the impedance of the module and the DC cable to the ground,
and confirm whether the voltage to the ground or the insulation impedance
is below the specified alarm value.
3 、 Check
whether the voltage to the ground or the insulation impedance is less than
the specified alarm value.
4、Confirm whether there is a short circuit or mechanical damage on the
cable shielding of cable.
5、If the cable is not damaged, the insulation fault occurs in wet weather.
Please confirm again when the weather is not wet.
Check whether all wiring works and is firmly connected (power supply line
and communication line). Confirm whether the A/B line is connected
correctly. If the above things are fine, please replace the LCD display screen
or contact manufacture Vision.
1、Determine the position of the defective cell module. Unpack and inspect
the welding of the battery copper strip or nickel strip, and tighten the bolts.
2、Charge and discharge the battery or replace the module. This is the only
operations that the users could do or contact the manufacturer.
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the BMS insulation impedance to the ground, and confirm
107
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