CHINT NVF5-3.7/TS4-B - Chapter 7 Troubleshooting; Diagnostic Process and Fault Solutions

NVF5 Series User Manual Chapter 7 Troubleshooting
Chapter 7 Troubleshooting
7.1 Diagnostic
7.1.1 Diagnostic process
The flow chart of the fault diagnosis is shown below
YES
NO
If serious failure appears after
power up, such as no display,
abnormal sound etc.
End
Check Fault code refer to
chapter 7.
2. Can solve or not?
Check abnormal handing
refer to chapter 7.3. Can
solve or not?
Fault reset
Asking for Chint
technical support
YES
Power off
immediately
NO
NO
Start
Figure 7-1-1 Fault Diagnosis Flow Chart
7.1.2 Fault description and Trouble shooting
If a fault appreas，Please see for an explanation of the fault code and check by
youself firstly before asking for help from Chint or Chint channels.When you need
support,please contact Chint or Chint channels.
Code
Fault Type
Fault reason
Action
E.OC1
Inverter
Accel.
running
overcurrent
1、 Low grid voltage
Check the input power
supply
2、Directly and quickly start
rotating motor
Start inverter when motor
stop
3、Accel. Time too short
Increase accel. time
4、Incorrect Motor Nameplate
Motor auto tuning
5、Too small inverter power
Enlarge inverter power
rate
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