DNH DHVC5000 Series, Use Manual

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Unit upgoing,
downgoing
communication
fault
Fault
Unit board card loses power,
optical fibre is broken
1. Check whether power unit light illuminates
normally
2. Replace the unit or replace the power unit
control board card
3. Replace the PWM board card
4. Check the fuse, whether diode is damaged,
replace the damaged components
5. Check whether fibre pigtail is inserted firmly, if
optical fibre is damaged, replace it
Unit fault Fault
Any unit fault will lead to this
fault information, corresponding
detailed fault information will be
accompanied.
1. Eliminate corresponding fault, generally, this
fault will not appear separately, it will be related to
a specific fault
2. If there is no other fault corresponding to the
unit, contact the manufacturer
Unit IGBT
Fault
Fault
IGBT short circuit, open circuit or
drive circuit fault might appear.
1. In overload operation, instant fluctuation occurs,
reduce the load
2. Replace the power unit or power unit control
board card.
3. Check whether the drive line is connected
firmly
4. Replace the IGBT module
Unit
Overtemperature
Fault
Temperature of the power unit
radiator reaches 75 º, ventilation is
poor or temperature switch is
damaged.
1. Deal with the air duct
2. Check whether cooling fan is normal
3. Replace the power unit or power unit control
board card
4. Replace the temperature switch
5. Deal with the system interference problem
Unit Undervoltage Fault
Unit DC bus voltage is lower than
550V DC
1. Replace the power unit or power unit control
board card
2. Check the fuse, whether diode is damaged,
replace the damaged component
3. Check poor connection between the unit input
terminal and cabinet body plug-in unit.
4. Check whether system input voltage is too low
Unit Overvoltage Fault
Bus voltage in the unit exceeds
1200V DC. Generally this is caused
by too high regenerative braking or
out of control
1. Check V/F curve, acceleration time,
Deceleration parameter setting
2. Check whether system input voltage is too High
3. Replace the power unit or power unit control
board card
Medium voltage
drop during
operation
Fault
Input voltage is lower than the
setpoint
1. Check power grid, and confirm the higher level
HV switchgear is disconnected;
2. Check whether input voltage sensor is damaged.
The unit loses
power during
operation
Fault
When unit bus voltage is lower than
the setpoint 1. Check unit board card;
2. Test the diode.
Cabinet door is not
closed Alarm
MVC cabinet door is not closed
1. Check whether all cabinet doors are closed;
2. Check whether the wiring of travel switch is
correct.
Analog setting
signal is missing Alarm
Some analog input signals are not
fed into the controlling machine
1. Check whether relevant signal lines are loose,
confirm remote output;
2. Analog board is damaged.
Communication
Board fault
Fault
Communication failure between the
CPU and communication board 1. Check the communication board;
2. Board card is not inserted firmly.
Remote
Emergency Stop
Fault
Remote emergency stop input
signal is to low a level
1. Check whether the remote emergency stop
button is engaged;
2. Remote emergency stop signal input line is
loose;
3. Corresponding relay in the MVC is damaged;
4. Digital board or CPU board is damaged.
PWM Blockade Fault PWM fault
1. Wrong setting for the number of unit stage;
2. Unit fault.