No.
Failure item
System
default
operation
Failure definition
Solutions
Remarks
16 Motor stall
Not
detected
• The motor
frequency/speed is below
the set value
• A torque limit condition
is present
• Both conditions occur
simultaneously and the
duration time is above the
setting stall time
1. Check whether the motor is
overload.
2. Check whether there is any
mechanical failure.
3. Check if there are any other
problems which make the
motor jam.
System
operation is
configurable
17 Motor Reverse
Not
detected
The motor is rotating
reversely.
1. Check the motor rotating
status.
System
operation is
configurable
18
Motor Over
Speed
Coast stop
120% of maximum
operational speed when
the condition lasts over
10sec
1 Check the motor status.
2 Check if speed encoder is
broken.
System
operation is
configurable
19
Motor Under
Speed
Not
detected
6% of minimum
operational speed when
the condition lasts over
60sec
1 Check the motor status.
2 Check if speed encoder is
broken.
System
operation is
configurable
20
Analog
Reference Loss
Alarm
The analog input is
disconnected
1. Check the analog circuit.
System
operation is
configurable,
The system
continuously
operates and
keeps the last
reference speed
21
Encoder
Abnormal
Coast stop
during SVC,
not
detected
during
SLVC
The encoder signal loss
occurs, or the error
between encoder speed
and estimated speed is
higher than 5%
1. Check whether the encoder
is normal.
System
operation is
configurable
22
Input Over
Current(Hardwar
e)
Trip
The input current is larger
than 210% of input
current sample rating
1. Check the input current.
Summary of Contents for MVF2000 Series
Page 2: ......
