SVC06 Series

Warning Status

  • This warning status alerts you that the protection function of the inverter has been activated. However, the inverter keeps on running. If the inverter runs for a long time in this status, the inverter may enter the alarm status and stop running.
  • In the status display mode, details of the warning and the status indication alternate on the display when a warning has occurred. When the status display mode is not selected, the alternating display appears on the display if the warning is still active after the status display mode is resumed.
  • All keys are valid during the warning status because the inverter continues to run.

List of Warnings

Warning display Warning content Description
SC Current limiting during acceleration / deceleration Acceleration (deceleration) time too short
SCn Current limiting during constant speed operation Load too heavy, output frequency too high
Su During overvoltage prevention Deceleration time too short
oL Overload warning Load too heave, continuous operation will cause an inverter shutdown.
tH Radiator temperature warning Temperature of the radiator is rising. Check the ambient temperature and operation of the cooling fan. The warning is issued at a temperature 10℃ below the abnormal radiator fin temperature (OH) (The abnormal radiator fin temperature differs depending upon the output frequency, output current and other factors)
dboH Overheating of brake resistor Brake resistor capacity too low. (%ED is small)
Brake resistor stops to prevent heat damage.
FbEr Disconnection of feedback cable A feedback is abnormal. Please check feedback value and feedback signal.
CtLEr Disallowance of the motor rotation direction Since an operation command unallowed by the specified rotation direction has been input, please confirm the setting of motor rotation direction.
oPtEr Option error Two mounted optional boards are conflicting with each other.
(The optional board mounted on OPT2 will be invalid.)
uiEr Conflict warning for analog input setting For the same analog input channels, input current and voltage input is set at the same time. Please confirm the function code selected by analog input.
PGnG PG line error detection A reverse direction is detected by PG feedback. Please confirm the phase of PG pulse.


Alarm Status

  • The alarm status occurs when the protection function stops the inverter.
  • During alarm status, all values on the display (Hz, A, rpm, %, M) flash indicating the alarm status.
  • When Status Display mode is selected, details of the alarm are indicated on the 7-segment display. If the Status Display mode is not selected, details of the alarm are indicated on the 7-segment display if the alarm status continues after the Status Display mode is resumed. Details of the alarm cannot be deleted.

List of Alarms

7-segment monitor display Alarm Description Check points Actions
*2 Memory abnormality Turn off the power and wait until the CHARGE lamp turns off, turn the power on again and check the alarm. Contact your supplier.
*1 System abnormality Excessive external noise? Are signal and power lines separated far enough? Install a noise collector or filter Keep the signal line far away from the power line
*1
*2 System abnormality Abrupt capacitor discharge? Turn off the power so the CHARGE lamp turns off, turn the power on again and check the alarm. Reconfirm the modified code data. Turn the power on and off several times. If the alarm cannot be cancelled, reset the system using F1604=1 and then turn the power off and on again. All the function data is initialized to the factory presets.
*2 System abnormality Excessive external noise? Are signal and power lines separated far enough? Install a noise collector or filter Keep the signal line far away from the power line
*2
System abnormality Abrupt capacitor discharge? Turn off the power so the CHARGE lamp turns off, turn the power on again and check the alarm. Contact your supplier.
Overload prevention during acceleration Setting for output current limiting function (F1701) too small? Increase the setting value of F1701 Prolong acceleration and deceleration time
Overload prevention during constant speed
Overload prevention during deceleration
External thermal alarm Motor overheated? Function settings are correct? Reduce the load
Re-set the function codes correctly (F1413)
Radiator temperature abnormality Fan stopped?
Ambient temperature too high?
Check fan operation
Increase the ventilation
Undervoltage during acceleration Does power supply satisfy conditions?
Has the voltage dropped?
Examine/improve power supply conditions.
Undervoltage during constant speed
Undervoltage during deceleration
Main switch element temperature abnormality Fan stopped?
Ambient temperature too high?
Check fan operation
Increase the ventilation
*3 Overcurrent during acceleration Abrupt acceleration / deceleration rate?
Output short-circuited or ground fault?
Main switch elements abnormality?
Prolong acceleration and deceleration time. Correct short-circuit or ground fault. Contact your supplier when alarms are issued repeatedly.
*3 Overcurrent during constant speed
*3 Overcurrent during deceleration
Momentary overload during acceleration Excessive acceleration rate?
Setting for current limiting function (F1701) too high?
Prolong acceleration time
Decrease the setting value
Momentary overload during constant speed Abrupt change (increase) in load?
Setting for current limiting function (F1701) too high?
Eliminate the abrupt change (increase)
Decrease the setting value
Momentary overload during deceleration Excessive deceleration rate with a GD2?
Setting for current limiting function (F1701) too high?
Prolong acceleration time
Decrease the setting value
Overload during acceleration Motor operated with an excessive load?
Electrothermal level set properly?
Load GD2 too large?
Reduce the load
Increase the capacity of the inverter and motor
Overload during constant speed
Overload during deceleration
Overvoltage during acceleration Did start-up occur during free run? Flying start.
Overvoltage during constant speed Is motor being turned by other force? Redesign the system so that the motor is not driven by external force.
Use a brake resistor with a larger capacity.
Overvoltage during deceleration Excessive deceleration? Prolong the deceleration time (so that GD2 of the load is met)
Brake resistor overvoltage protection Braking frequency too high? Reduce the braking frequency Increase the brake resistor capacity
Disconnection of feedback signal cable (during PID control action) Feedback signal cable disconnected?
Feedback signal correct?
Gain frequency correct?
(F1402, F1404, F1406)
Check feedback signal cable and connect securely.
Set gain frequency properly
(F1402, F1404, F1406)
Overspeed Over-shoot or under-shoot happened? Confirm speed command value or torque command value
Modbus communication timeout Communication cable disconnected? Confirm communication cables are connected securely
The abnormality in a board Has not a +V terminal of a control circuit terminal overload or short-circuited? The resistance of potentiometer linked to a +V terminal is made into a proper value.
*2 Power supply abnormality +24V power supply output from the control circuit overloaded or shorted? Check the +24V output power supply for load conditions
Missing output phase Missing an output phase? Connect the output cables securely
Missing input phase Missing an input phase? Check and improve the input current
Check grounding short-circuit current Short-circuited when grounding? Confirm output cable and motor insulation performance
Disconnection of PG pulse feedback signal cable Position deviation counter abnormality Feedback signal cables are well connected?
Is motor being driven by other force?
Connect the feedback signal cable securely
Redesign the system so that the motor is not driven by external force.
Cooling fan abnormality Cooling fan is working? Check the fan performance
Main relay abnormality Turn off the power and wait until the CHARGE lamp turns off, turn the power on again and check the alarm. Contact the supplier
  • *1 Since all function data are initialized to the factory presets, settings will need to be input again.
  • *2 several times of power on/off, contact your supplier if the alarm is displayed again.
  • *3 Even though a protective function against short-circuit of the main switch element is installed, repeated short-circuiting may cause deterioration of the elements and lead to damages to the inverter. Therefore the inverter can only be restarted after checking and removing the cause of the problem.
Note:
If the display on the operation panel goes out for some reason, turn off power supply to the inverter to check the wiring; then turn the power on after CHARGE lamp has gone out. (Short-circuiting caused by improper connection of control terminals and so on)
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