Chapter 7 – Troubleshooting
Chapter 7 – Troubleshooting
1 - FAULTS
1.1 - SYSTEM FAULT
If the red SYS led is lit when the drive is on, the logic board is not operational.
- Check that the 4 error LEDs are blinking. In this case, load the drive firmware via the serial link by using the
CD1 updater software.
- Check for the possible presence of any conducting dust that may involve short-circuits on the drive logic
board.
1.2 - "BUSY" FAULT
If the BUSY fault is continuously displayed after turning on the drive, the AUTOTEST procedure has failed and
the drive is not ready for operation. Check that the power voltage is not on before the 24 V auxiliary
supply (see connection diagrams in Chapter 4, section 1)
If the BUSY fault is continuously displayed after the execution of the motor PHASING procedure by CVO at
power up (Incremental encoder configuration without HES), the procedure has failed because of an external
cause and the calculated phase value is wrong. Check for the correct Motor encoder resolution parameter
value. Check for the correct Motor parameters (Pole pairs and Phase order) values. Check that the
ENABLE input is activated. Check that the limit switches inputs are not activated. Check that the motor is not
locked and the shaft movement free during the procedure execution.
If the BUSY fault is continuously displayed after the execution of the AUTO-PHASING function, the procedure
has failed because of an external cause and the calculated parameters are wrong. Check that the ENABLE
input is open. Check that the limit switch inputs are not active. Then check that the motor is unloaded and the
shaft movement free during the procedure.
If the BUSY fault is continuously displayed after the execution of the AUTO-TUNING function, the procedure
has failed because of an external cause and the calculated parameters are wrong. Check that the ENABLE
input is open. Check that the limit switch inputs are not active. Then check that the motor shaft is free during
the procedure.
If the BUSY fault is continuously displayed after the execution of the OFFSET COMPENSATION function, the
offset is exceeding 0.5 Volt. Check the voltage on the CV input during the procedure.
If the BUSY fault is continuously displayed after the execution of the COGGING TORQUE ACQUISITION
procedure, the procedure has failed because of an external cause and the cogging torque acquisition is not
valid. Check that the ENABLE input is activated. Check that the CI and CV0 inputs are not activated. Check
that the limit switches inputs are not activated. Check that the encoder is providing one marker pulse per motor
revolution. Check that the motor is unloaded and the shaft movement free during the procedure. Check that
the motor current value corresponding to the cogging torque effect is lower than 5 % of the drive current rating.
1.3 - "EEPROM" FAULT
Check for the presence of the EEPROM and its correct orientation.
If the fault remains, the EEPROM is not correctly initialized (CHECKSUM) or is not complying with the drive
software version.
1.4 - "°C MOTOR" FAULT
If the failure occurs when starting the drive:
Modify the thermal sensor type (CTP or CTN) by means of the VISUAL DRIVE SETUP software. Make a
fault RESET by means of the VISUAL DRIVE SETUP software. The “°C MOTOR" fault display must go out.
Check the connection between the thermal sensor and the drive on the front panel X1 connector.
If the failure occurs during the operation:
Check the motor temperature and look for the reason of this overheating (mechanical shaft overload, duty
cycle too high, motor type to small with regard to the machine cycle…).
1.5 - "UNDERVOLT" FAULT (non stored)