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Integrated Lithium-ion Battery Pack
User Manual
4 MAINTENANCE
Faulty reasons and handling methods
Table 4-3 lists of most frequently failures and solutions.
Table4-3 Checklist
Failure
modes
Possible reasons
Solutions
Over
voltage
⚫
DC over-voltage
alarm set
Unreasonable.
⚫
In manual control
mode, the power
supply voltage is
set too high.
⚫
Rectifier module
failure.
⚫
Check if the DC over-voltage alarm point
(default value is 58.5V) is reasonable. If it
is unreasonable, adjust according to the
actual situation.
⚫
Check whether the manual control
increases the system voltage. If yes,
confirm the cause and return to the
normal value when the operation is
completed.
⚫
Pull out the rectifier module one by one
to check whether the alarm disappears. If
the alarm still exists, insert the rectifier
module into the home position. If the
alarm disappears, replace the module.
Under
voltage
⚫
No AC power.
⚫
Monitoring
module DC
undervoltage
alarm point set
unreasonable.
⚫
System
configuration is
unreasonable.
⚫
In manual control
mode, the power
supply voltage is
set too low.
⚫
Check whether
the exchange of
power outage
and restore AC
power supply.
⚫
Check the DC under voltage alarm point
(default value is 45V). If it is not
reasonable, adjust it according to the
actual situation.
⚫
Check that the power system current
value is greater than the current power
system capacity and, if so, increase
capacity configuration or reduce the
power system load.
⚫
Check whether the manual control to
reduce the system voltage, if so, should
confirm the reason, to be restored to
normal after the completion of the action.
⚫
Check whether the rectifier module is
faulty and the system capacity does not
meet the load demand. If yes, replace
the rectifier module.
Charge
over current
⚫
Module
communication
interruption.
⚫
Loose contact for
monitor module.
⚫
Monitoring
failures.
⚫
If there is a commutation module
communication interruption alarm, if yes,
plug and unplug the commutation module
of communication interruption to confirm
whether the alarm is cleared. If the alarm
continues, replace the rectifier module.
⚫
Reinstall the monitoring module, if still
alarm, replace the module.
