Fault Diagnoses Process; System Fault Diagnoses Process; Over-Current Diagnoses Process - Veichi AC300 Series Technical Manual

AC300 Series Vector Control Inverter Manual

5.3 Fault Diagnoses Process

System fault diagnoses process

yes
Clear short circuit
Whether there is short circuit between outout terminal U/V/W and the motor
yes
Cable between output terminal U/V/W and motor
Short the cable or
is too long that leakage current cause inverter protection
add outout reactor
yes
Clear disturbance
Is there serious electromagnetic disturbance?
While disconnect output wire and run,whether there is system fault alarm
yes
Connect load and
Three phase outout voltage balance is ok or not?
operate as follows
yes
Reduce load or
enhance power
no
no
Display E.SC
Display E.SC
while start while stop
yes
yes
yes
Torque enhance value Whether acceleration
is suitable or not
time is too short
no yes
no
Torque enhance
ACC time can be
valuecan be
prolonged or not
reduced or not
yes
yes
Prolong setting time
Reduce
Reduce load or
enhance power
Fault Diagnoses and Processing
system fault
no
no
no
yes
no
no
yes
Whether overload or not?
no no
yes
Display E.SC while Display E.SC while
constant speed machine stop
yes
no
no
Whether load
Whether deceleration
change suddently
time is too short
yes
yes
Dec time can be
Reduce load change
prolonged or not
or enhance power
yes no
Check braking mode,
seek tec support
Inverter fault or misaction caused by
noises.Pls find technic support
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AC300 Series Vector Control Inverter Manual

Over-current diagnoses process

Accelerate over
curent E.0C1
yes
Whether short circuit between output terminal
Clear short circuit
U/V/W and motor or earth circuit
no
yes
Reduce load or
enhance power
no
no
Whether torque
Can be reduced?
enhance value is too
yes
yes
Is acceleration time
Reduce the value
set too short?
no
yes
May fault or misaction
caused by noise.Please
find technic support
yes
Set longer acceleration
time or not?
Prolong setting time
no
Reduce load change
or improve power
Fault Diagnoses and Processing
Decelerate over
Constant speed
curent E.0C2
over curent E.0C3
no
no
Whether load is too large
no
no
Is deceleration
time set too short?
no
yes
no
Whether load
changes suddently
yes
Whether set longer
Reduce load change
decelerationtime
or improve power
yes
no
Check braking mode
and seek for technic support
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