Chapter 7 Fault Diagnosis And Countermeasures - Fuling Inverter DZB200 Series User Manual

DZB Series

Chapter 7 Fault Diagnosis and Countermeasures

DZB300 has 25 pieces of alarm information and protection functions in total. Once the fault occurs,
the protection function starts, the inverter stops inputting, the fault relay contact point is activated, and the
fault code will be displayed on the display panel of the inverter. Before seeking services, the subscriber
may conduct the self-check according to the prompt given in this section, analyze the fault causes, and find
out the solutions. If the fault belongs to the causes described in the broken line box, please seek the service
by contacting the inverter agent or directly contacting our corporation.
Common Faults and the Fault Diagnosis
The following faults may probably occur during the using of the inverter, please refer to the methods
described below to perform the fa ult analysis.
1. No Electricity Display
1) Check with multimeter if the input power supply of the inverter i s consistent with it s rated voltage.
If there is something wrong with the power supply, please check and remove it.
2) Check if the three-phase rec tifying bridge is intact. If the rectifying bridge has been exploded,please
seek technical service.
3) Check if the CHARGE indicator is on. If the indicator is off, the fault will be on the rectifying bridge
or the buffering resistance. If the indicator is on, the n the fault may probably lies in the sw itch on/off part,
please seek for help.
2. The air Switch Trips off After Power-on
1) Check if the earthing or short circuit occurs between the input power supplies and remove the problem.
2) Check if the rectifying bridge has been broken down. If so, seek for the service.
3. The Motor Does not Run After t he Inverter Starts to Run
1) Check if there is equalizing three-phase input between U, V and W. If yes, the motor circuit or itself
may be damaged, or the motor stops turning for mechanical reason. Please remove it.
2)If there is input but the three phases are not equalizing, the inverte r drive board or the output module
may be damaged. Please seek for the service.
3) If there is no output voltage, the drive board or output module may be damaged. Please seek for the
service.
4. When the Power-on Inverter Di splays Normally, t he Air Switch Trips off After the Operation.
1) Check if the short circuit occurs between the output modules. If yes, please seek the service.
2) Check if the short circuit or earthing occurs between the motor lead wires. If yes, pl ease remove it.
3) If the tripping occurs only occasionally and the distance between the motor and the inverter is big,
then the adding of an output AC reactor shall be considered.
- 73-
Cha pter 7 Fault Diagnosis and Countermeasures
DZB Series
1. Und er voltage of DC Bus(E001)
Transient powe r cut exists or not
No
Check if the input end voltage of
the motor driver inverter is wit hin the
value required by the regulation
Ye s
Measure if the DC
bus voltage is normal
Ye s
No
No
Check if the rectifying bridge
or the buffering resis tor is normal
Ye s
No
Che ck if the drive board is normal
Yes
No
Check if the main control
board is norm al
Reference for the
maintenance personnel
2. Ove r voltage during acceleration(E002)
The inp ut voltage is too h igh or not
No
If there exists the external force
driving the motor operation during
the acc eleration process
No
The acceleration time is too short or no t
No
Is there any brake unit
or brake resistor insta lled
Ye s
Seek technical support
- 74-
Chapter 7 Fault Diagnosis and Countermeasures
Yes
motor driver inverter reset
Adjust the power supply or
No
remove the peripheral
power-supply loop fault
Replace the damaged rectifying
bridge or the buffering resistor
Chan ge drive board
Chan ge main control board
Yes Adjust the voltage within
the normal range
Yes
Cancel the external force
or install the brake resistor
Yes
Increase the acceleration
time
No
Install the brake unit and
resistor
www.yusto.ru
info@yusto.ru