Fault Diagnoses Process - Veichi AC90 Manual

AC90 TENSION CONTROL FREQUENCY INVERTER MANUAL
E.PID

5.3 Fault diagnoses process

System fault diagnoses process
Clear short circuit
Short the cable or
add outout reactor
Clear disturbance
Connect load and
operate as follows
Reduce load or
enhance power
Display E.SC
while start
Torque enhance value
is suitable or not
Torque enhance
valuecan be
reduced or not
● PID feedback upper limit
of disconnection alarm is
improper
● PID feedback lower limit of
disconnection alarm is
PID feedback
improper
failure ● PID feedback wiring
unreliable
● Sensor with feedback
failure
● Feedback input loop
failure
Chart 5-1: Fault information and details
yes
Whether there is short circuit between outout terminal U/V/W and the motor
yes
Cable between output terminal U/V/W and motor
is too long that leakage current cause inverter protection
yes
While disconnect output wire and run,whether there is system fault alarm
yes
yes
no
Display E.SC
while stop
yes
yes
yes
Whether acceleration
time is too short
no
no
ACC time can be
prolonged or not
yes
yes
Prolong setting time
Reduce
Reduce load or
enhance power
BASIC OPERATION AND TRIAL RUN
system fault
no
no
Is there serious electromagnetic disturbance?
no
no
Three phase outout voltage balance is ok or not?
yes
Whether overload or not?
no
no
Display E.SC while
constant speed
yes
no
Whether deceleration
time is too short
yes
yes
Dec time can be
prolonged or not
yes no
Check braking mode,
seek tec support
Inverter fault or misaction caused by
noises.Pls find technic support
54
Confirm the sensor state, if
●
broken, change it.
Repair the wiring.
●
Confirm the setting value of
●
[Fb.16] and [Fb.17].
yes
no
no
yes
Display E.SC while
machine stop
no
Whether load
change suddently
yes
Reduce load change
or enhance power