CHINT NVF5-0.75/TS4-B - Abnormal Operation and Solutions

NVF5 Series User Manual Chapter 7 Troubleshooting
7.2 Abnormal Operation and Solution
Phenomenon
Condition of
occurrence
Possible reason Solution
Integral
Keypad does
not respond
Integral
keypad keys do
not respond
Integral
Keypad Lock
When stop or running
condition
，
first
pressPRG/Sand hold
，
also
press▼to unlock
Inverter power off then
power on
Integral
Keypad Failure
Asking for Chint technical
support
Parameters
Can Not be
Modified
Not modified in
Running Mode
Parameter can not be
modified in
Running Mode
Modifie when stop mode
Part of
Parameters Not
Modified
Parameter F7.03 set to
1or 2
Change Parameter F7.03 to
0
Display Parameter, can
not be Modified
Parameters User can not
modify
Press PRG/S
but useless
，
Parameter
display”0000”
User Password be Set
Input correct user
password
Asking for Chint technical
support
Inverter
Accidentally
Stop In
Running
Mode
Inverter
automatically
shuts down,
and the running
indicator light
off
Fault or Alarm Happened
Find the fault cause, reset
the fault
Power Supply Shut
Dowen
Check Power Supply
Command Setting Switch
Check command parameter
setting
Command Terminals
Logic Reverse
Check Parameter F5.06
setting
Inverter run in
Fault reset
Check “fault automatically
ground
E.LL
Load Loss
Fault
Inverter Current is Smaller than
the value of Parameter
FE.18
Check whether load loss or
parameter FE.17、FE.18
、
FE.19 parameter setting
E.FbL
PID Feedback
Loss Fault
Inverter PID Feedback is
Smaller than the value of
Parameter F9.26
Check PID feedback signal
or parameters setting of
F9.26
、F9.27
E.OT
Motor
Overheat Fault
1、
Loose connection of motor
temperature sensor
Check the wiring of the
motor temperature sensor
2、Motor Overheat
Increase carrier frequency
or Improve motor overheat
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