Emotron EMX-B, Instruction Manual

Page: 48 / 60

44 Troubleshooting
CG Drives & Automation 01-6048-01r3
Red and green
LED flashes
rapidly and
alternately
Earth fault in
the motor/
Short circuit in
the motor
- Disconnect the supply voltage, check the
connection of the motor cable and check that
the correct motor is connected. If the fault
remains, carry out motor diagnosis.
- If the motor is faulty, replace it. If the fault
does not lie within the motor, replace the
control unit.
Red LED
flashes rapidly
and Green LED
is off
Internal
Rotation
monitor
- The exchanger rotor does not rotate; check
the drive belt.
- If Internal rotation monitor is used, check that
the rotor or belt pulleys are not very small.
Red LED
flashes
rapidly and
Green
LED is lit
External
Rotation
monitor
External rotation sensor error;
- Check whether the external rotation sensor is
working and providing proper pulses.
- Check function of the rotation sensor:
Measure with a Multimeter between terminal
31 and 32, correct sensor measures:
NO sensor shows > 8 V
DC
& < 12V
DC
NC sensor shows < 1 V
DC
when the magnet passes the sensor.
- Check whether the connection of external
rotation sensor is made properly.
- When DIP 6 is in external rotation sensor
position (UP) and if no connection is provided
at terminals 31 and 32 then this alarm is
triggered.
Green LED is lit
and Red LED is
off Test to check
broken belt in
progress
This not any alarm condition. It only indicates
that an internal UltraRotoSense ™ belt test is
currently being performed. For details see
chapter 3.3.1 page 24.
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