Emotron EMX-B, Instruction Manual

Page: 47 / 60

CG Drives & Automation 01-6048-01r3
Troubleshooting 43
Table 13 Trip condition, their possible causes and remedial action
Alarm
indication
Possible
cause
Remedy
LED indication
Flash slowly =
about 1 time/s
Flash rapidly=
about 10 times/s
Green LED
flashes slowly Purging / low
control signal.
- If the motor is not running and Green LED
flashes slowly, check the drive system with
the test switch.
The motor should accelerate to its maximum
speed. If the motor does accelerate to the
maximum speed when the test switch is
activated, the fault is external.
- Is the control signal between terminals 36(+)
and 35 (-) present?
- Have + and - been swapped?
Red LED is lit
Overload/
motor
protection
- The motor protection has been activated due
to excessive load. Check that the motor
cables are connected correctly; see the
chapter on Mounting/Connection.
- Check also that the rotor runs freely and that
the diameters of the rotor and pulley are
correct. If wrong pulley is mounted, change
pulley or change max. speed with DIP-switch
1 to 4 acc. to chapter 3.9.2 page 30.
- If the fault remains, carry out motor diagnosis.
Replace the motor if it is faulty. If the fault
does not lie within the motor, replace the
control unit.
Red and green
LED flashes
slowly and
alternately
Over voltage
Under voltage The supply voltage exceeds 260V
AC
The supply voltage lies below 180V
AC