Emotron FDU Series User Manual

CG Drives & Automation 01-7491-01r0 Troubleshooting, Diagnoses and Maintenance 197
Comm error Error on serial communication (option)
- Check cables and connection of the
serial communication.
- Check all settings with regard to the
serial communication
- Restart the equipment including the
AC drive
Encoder
Lost encoder board, encoder cable or
encoder pulses.
Motor speed deviation in between
reference and measured speed detected.
NOTE: Only valid if option board
Encoder is used.
- Check encoder board.
- Check encoder cable and signals.
- Check motor operation.
- Check speed deviation settings [22G#].
- Check speed PI controller settings [37#].
- Check torque limit setting [351]
- Disable encoder, set menu [22B] to OFF.
Pump
No master pump can be selected due to
error in feedback signalling.
NOTE: Only used in Pump Control.
- Check cables and wiring for Pump feedback
signals
- Check settings with regard to the pump feedback
digital inputs
Over temp
Heatsink temperature too high:
- Too high ambient temperature of the
AC drive
- Insufficient cooling
- Too high current
- Blocked or stuffed fans
- Check the cooling of the AC drive cabinet.
- Check the functionality of the built-in fans. The
fans must switch on automatically if the heatsink
temperature gets too high. At power up the fans
are briefly switched on.
- Check AC drive and motor rating
- Clean fans
Over curr F
Motor current exceeds the peak AC drive
current:
- Too short acceleration time.
- Too high motor load
- Excessive load change
- Soft short-circuit between phases or
phase to earth
- Poor or loose motor cable connections
- Too high IxR Compensation level
- Check the acceleration time settings and
make them longer if necessary.
- Check the motor load.
- Check on bad motor cable connections
- Check on bad earth cable connection
- Check on water or moisture in the motor housing
and cable connections.
- Lower the level of IxR Compensation [352]
Over volt
D(eceleration)
Too high DC Link voltage:
- Too short deceleration time with
respect to motor/machine inertia.
- Too small brake resistor malfunctioning
Brake chopper
- Check the deceleration time settings and make
them longer if necessary.
- Check the dimensions of the brake resistor and
the functionality of the Brake chopper (if used)
Over volt
G(eneration)
Over volt (Mains)
Too high DC Link voltage, due to too high
mains voltage
- Check the main supply voltage
- Try to take away the interference cause or use
other main supply lines.
O(ver) volt
M(ains) cut
Under voltage
Too low DC Link voltage:
- Too low or no supply voltage
- Mains voltage dip due to starting other
major power consuming machines on
the same line.
- Make sure all three phases are properly connected
and that the terminal screws are tightened.
- Check that the mains supply voltage is within the
limits of the AC drive.
- Try to use other mains supply lines if dip is caused
by other machinery
- Use the function low voltage override [421]
LC Level
Low liquid cooling level in external reservoir.
External input (DigIn 1-8) active:
- active low function on the input.
NOTE: Only valid for AC drive types with
Liquid Cooling option.
- Check liquid cooling
- Check the equipment and wiring that initiates the
external input
- Check the programming of the digital inputs DigIn
1-8
OPTION If an Option specific trip occurs Check the description of the specific option
Table 44 Trip condition, their possible causes and remedial action
Trip condition Possible Cause Remedy Size**

Emotron FDU Series Specifications

General

Brand	Emotron
Model	FDU Series
Category	DC Drives
Language	English