Simphoenix V800 Series - 8. WARNING, ALARM DIAGNOSIS AND COUNTER MEASURES; 8.1 TROUBLESHOOTING WITH WARNING OR ALARM DISPLAY; 8.1.1 ALARM DISPLAY AND TROUBLESHOOTING

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Warning, Alarm Diagnosis And Counter Measures
V800 Series High Performance Closed-Loop Vector Inverter User Manual
8. WARNING, ALARM DIAGNOSIS AND COUNTER
MEASURES
When the frequency inverter sends warning signals, the auxiliary display column displays warning code.
Some warnings have no influence on the operation of the inverter. Those warnings which may influence the
operation of the frequency inverter should be limited as much as possible; otherwise, more serious failures
may be caused. When the frequency inverter fails to alarm, its protective function will act and display fault
code and the inverter will stop outputting with the motor freely sliding and shutting down.
8.1 TROUBLESHOOTING WITH WARNING OR ALARM DISPLAY
8.1.1 ALARM DISPLAY AND TROUBLESHOOTING
Fault
code
Fault description
Possible causes
Solutions
Fu.001
Over current during
acceleration
1. The acceleration time is too short.
2. V/F curve or torque boosting is set
improperly.
3. After it is re-energized upon transient
stop, the rotating motor is restarted.
4. The frequency inverter has smaller
capacity.
5. The encoder is faulty or disconnected
during the operation and acceleration with
PG.
1. Adjust acceleration time.
2. Adjust V/F curve or torque
boosting parameters.
3. It is valid to set [F0.4.38] as 1;
Recover operation in the mode of
deceleration and restart after
power off.
4. Select frequency inverter with
matched capacity level.
5. Inspect encoder and its
connection
Fu.002
Over current during
deceleration
1. The deceleration time is too short.
2. The potential energy load or load inertia is
too large.
3. The frequency inverter has smaller
capacity.
4. The encoder is faulty or disconnected
during the operation and deceleration with
PG.
1. Adjust deceleration time.
2. Connect braking resistor or unit
externally.
3. Select frequency inverter with
matched capacity level.
4. Inspect encoder and its
connection.
Fu.003
Over current during
operation
1. The load changes suddenly.
2. The grid has over-low voltage.
3. The frequency inverter has smaller
capacity.
4. The load is overweight.
5. After it is re-energized upon transient
stop, the rotating motor is restarted.
6. The output line of the frequency inverter
has interphase short circuit or phase line
short circuit to ground.
7. The encoder is faulty or disconnected
during operation with PG.
1. Reduce load sudden change.
2. Inspect voltage of power supply.
3. Select frequency inverter with
matched capacity level.
4. Inspect load or replace a
frequency inverter with larger
capacity.
5. It is valid to set [F0.4.38] as 1;
Recover operation in the mode of
deceleration and restart after
power off.
6. Eliminate short circuit failure.
7. Inspect the connection of
encoder.