Emotron EMX-D, Instruction Manual

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Emotron AB 01-5016-01r0 Troubleshooting, Diagnoses and Maintenance 37
Table 10 Trip condition, their possible causes and remedial action
Trip condition Possible Cause Remedy
Motor PTC
Motor thermistor (PTC) exceeds maximum
level.
- Check on mechanical overload on the
motor (bearings, gearbox, belt, etc.)
- Check the motor cooling system.
- Self-cooled motor at low speed, too high
load.
Over temp
Heat sink temperature too high:
-
Too high ambient temperature of the
VSD
- Insufficient cooling
- Too high current
- Blocked or stuffed fans
- Check the functionality of the built-in fans. The fans
must switch on automatically if the heat sink
temperature gets too high. At power up the fans are
briefly switched on.
- Clean fans
- Check the cooling of the cabinet (if applicable).
Over curr F
Motor current exceeds the peak VSD 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
- 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.
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 dips 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 VSD.
- Try to use other mains supply lines if dip is caused by
other machinery
Trip
(rotation monitor)
The exchanger rotor does not rotate
The rotor rotates
- Check drive belt
- check that indication is given when the magnet passes
the sensor see chapter 6.2.1 page 21. If no indication,
replace the rotation sensor.
-
Check function of the rotatio
n sensor: Measure with a
Multimeter between terminal 11 and 16, correct sen-
sor measures < 1V when the magnet passes the sen-
sor.-
Desat
Overload condition in the DC-link:
-
Hard short-circuit between phases or
phase
to earth
- Saturation of current measurement
circuiting
- Earth fault
- Desaturation of IGBTs
- Peak voltage on DC link
- Check on bad motor cable connections
- Check on bad earth cable connection
- Check on water or moisture in the motor housing and
cable connections
- See overvoltage trips
Power Fault Error on power board. - Check mains supply voltage
Fan Error Error in fan module
- Check for clogged air inlet filters in panel door and
blocking material in fan module.