101
No.
Failure item
System
default
operation
Failure definition
Solutions
Remarks
8
Output Over
Current(Softwar
e)
Coast stop
The output current is
higher than 150% of the
rated current
1. Check the output current.
2. Check the set value.
System
operation is
configurable
9
Output Over
Load
Coast stop
Constant torque:
When the output current
is higher than 150% of the
rated current, allow 1
minute’s overload every
10 min;
Variable torque:
When the output current
is higher than 120% of the
rated current, allow 1
minute’s overload every
10 min;
1. Check the power grid
voltage.
2. Reset the rated current of
the motor.
3. Check the load and adjust
the torque increase.
4. Choose proper motor.
System
operation is
configurable
10
Output phase
loss
Coast stop
The software detects that
the output phase from the
MVD to motor is
disconnected
1. Check whether the output
wiring is loosen or
disconnected.
System
operation is
configurable
11
Output
Grounding
Coast stop
The software detects the
earthing failure which is
usually caused by the
output earthing failure
(phase-to-ground fault).
1. Check whether the external
cables and the motor are
earthed.
2. Check the insulation
situation of the motor and its
cables.
System
operation is
configurable
12
Output Phase
Imbalance Alarm
Not
detected
During 10 minutes of
continuous running time,
the cumulative time that
output unbalanced
degree above 15
‰
is
more than 30s
1. Check whether the
capacitance of DC-link caps is
in scope of spec.
2. Check whether the voltage
of transformer secondary
windings is balanced.
System
operation is
configurable
13
Output Phase
Imbalance Fault
Coast stop
The output unbalanced
degree is
above 30‰,
and the duration time is
above 1s
1. Check whether the
capacitance of DC-link caps is
in scope of spec.
2. Check whether the voltage
of transformer secondary
windings is balanced.
System
operation is
configurable
14
Output Under
Load
Not
detected
The software detects the
motor operating in under
load area, and the
duration time is above
20s
1. Check whether the load of
motor is too light.
System
operation is
configurable
15
Electronic Motor
Thermal
Protection
Not
detected
Calculated temperature
or temperature rise is
higher than the setting
value
1. Check whether the ambient
temperature is high.
2. Check whether the load of
motor is heavy.
System
operation is
configurable
Summary of Contents for MVF2000 Series
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