Optidrive VTC – User Guide
www.invertek.co.uk
25
8.
Troubleshooting
8.1.
Fault messages
Fault Code
Description
Corrective Action
Factory Default parameters have
been loaded
Press STOP key, drive is ready to configure for particular application
Instantaneous over current on drive
output.
Excess load on the motor.
Over temperature on the drive
heatsink
If the fault occurs immediately when enabling the drive, disconnect the motor cable from the output
terminals of the drive and restart the drive. If the fault re-occurs with no motor connected, contact
your local Invertek Sales Partner. If the drive runs correctly with not motor connected, check the
motor, motor cable and any connections or junction boxes for phase – phase and phase – earth short
circuits. Wherever possible, motors and connection cables should be checked with a high voltage
insulation tester (Megga) prior to connection to the drive.
Ensure that no switching devices, such as contactors or local isolators are switching during operation of
the drive.
Check the motor cable length does not exceed the specified maximum
Ensure the motor nameplate parameters are correctly entered, P1-07, P1-08, P1-09.
Ensure an autotune has been successfully completed for the connected motor.
Check the load mechanically for a jam or stalled condition, or shock loads.
Increase the ramp up time in P1-03.
Drive has tripped on overload after
delivering >100% of value in P1-08 for
a period of time.
Check to see when the decimal points are flashing (drive in overload) and either increase acceleration
rate or reduce the load. Check motor cable length is within spec. Ensure the motor nameplate
parameters are correctly entered, P1-07, P1-08, and P1-09. Ensure an autotune has been successfully
completed for the connected motor. Check the load mechanically to ensure it is free, and no jams,
blockages or other mechanical faults exist
Brake channel over current
Over current in the brake resistor circuit. Check the cabling to the brake resistor. Check the brake
resistor value. Ensure minimum resistance values form the rating tables are observed.
Brake resistor overload
Brake resistor overload. Increase deceleration time, reduce load inertia or add further brake resistors
in parallel, observing the minimum resistance value for the drive in use.
Fast over current trip
Check wiring to motor, look for ph-ph or ph-Earth short circuit. Check drive ambient temp, additional
space or cooling needed?
Check drive is not forced into overload.
Over voltage on DC bus
Supply problem, or increase decel ramp time P1-04.
Under voltage on DC bus
This occurs routinely when power is switched off. If it occurs during running, check power supply
voltage.
Heatsink over temperature
Check drive ambient temp. Additional space or cooling required.
Under temperature
Trip occurs when ambient temperature is less than 0°C. Temperature must be raised over 0°C in order
to start the drive.
Faulty thermistor on heatsink.
Refer to your IDL Authorised Distributor.
External trip (on digital Input 3)
E-trip requested on digital input 3. Normally closed contact has opened for some reason.
If motor thermistor is connected check if the motor is too hot.
Comms loss trip
Check communication link between drive and external devices. Make sure each drive in the network
has its unique address.
Input phase loss trip
Drive intended for use with a 3 phase supply has lost one input phase. Check incoming supply and
fuses.
Phase Imbalance
Mains incoming supply voltage has an imbalance of >3% for over 30 seconds. Check incoming supply
and fuses
Internal memory fault.
Parameters not saved, defaults reloaded.
Try again. If the problem re-occurs, refer to your local Invertek Sales Partner.
Autotune Failed
Measured motor stator resistance varies between phases. Ensure the motor is correctly connected and
free from faults. Check the windings for correct resistance and balance.
Measured motor stator resistance is too large. Ensure the motor is correctly connected and free from
faults. Check that the power rating corresponds to the power rating of the connected drive.
Measured motor inductance is too low. Ensure the motor is correctly connected and free from faults.
Measured motor inductance is too large. Ensure the motor is correctly connected and free from faults.
Check that the power rating corresponds to the power rating of the connected drive.
Measured motor parameters are not convergent. Ensure the motor is correctly connected and free
from faults. Check that the power rating corresponds to the power rating of the connected drive.
Spin Start Failure
Spin start function (P2-18=1) failed to detect motor speed
Check motor and connections. Ensure motor speed is less than maximum speed (P1-01). Make sure
motor base frequency (P1-09) is <100Hz
4-20mA Input Signal Loss
The level of the 4-20mA signal applied to analog input 2 (Terminal 4) has dropped below the minimum
threshold of 3mA. Check for wiring or signal transducer faults
