Docu-No.: 0590020601-EN Rev. 1.6.0 Page 71
Alarm Messages- Cause and Remedy 4
System alarms 4.1
14
MOTOR
OVERLOAD
• Motor current limit is exceeded.
Note:
The Safety switch is not designed to be
used as a normal way of interlocking
the KCM. It is used for safety control
only.
Reduce motor load.
Check motor power limit in the
<MECHANICAL> menu,
<MOTOR> sub-menu.
Review material/feeder selection.
15
MDU SAFETY
RELAY
• Safety relay failed to close contacts
on power up and contacts remained
closed after power down.
Replace Drive pcb.
16
MOTOR/ENCDR
FAIL
• Dual tach signals connected, one
failed.
• Over-voltage on drive power supply.
• Motor voltage applied but no speed
feedback.
• Drive temperature > 85 deg. C.
Check tachometer-replace.
Check motor brushes.
Replace motor if required.
Replace KCM drive board.
Check for excessive line voltage.
Reduce operating temperature.
17
MDU
UNCONTROLLED
• Speed feedback but no motor
voltage applied.
Replace drive board.
18
MDU EEPROM
FAILED
• EEPROM checksum failed. Cycle power. If error persists,
replace drive pcb.
19 MDU DRIVE
FAILED
• MDU drive pcb has failed. (vibratory
drive only. Drive coil current too
high)
Exchange vibratory drive pcb.
Check drive coil for proper
impedance.
20 MDU POLARITY • Coil polarity is incorrect on the
vibratory drive. (Vibratory feeder
only)
• Displacement frequency out of
range.
Change the feedback coil polarity
by swapping leads at KCM.
21 HCU REMOVED • HCU was removed. Connect HCU at the KCM and
switch KCM On.
Repoll SFT channel to re-connect
HCU.
Clear NOVRAM if necessary.
22 HCU ALARM • HCU has an alarm. See following alarms for trouble
shooting.
Alarm Num- Alarm
Cause Remedy
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