8. MAINTENANCE
8 - 3
Alarm Status
Segment LED
Display
Alarm Code
ALM8,4,2,1
Abbreviation
Alarm
Name
Alarm
Clear
Contents
OC (MOC)
Power
element
error
(Over
current)
Possible • Error detected in internal power module
(IPM) of Amplifier
• Abnormal value detected in current
detection module of Amplifier.
0001
IFBE
Current
detector
error
Possible • Current detector error of Servo Amplifier
was detected.
Alarm code 0,1 indicates: when Func2/ bit7,6 =”0,0”, “0”= output open and “1”= output short.
Operating state when alarm occurred
POSSIBLE CAUSES
OPERATING STATE
1 2 3 4 5
When control power supply is turned on
△
○
△
When servo ON is inputted
○ ○ ○ △
When motor is started or stopped
△ △ △ ○
After operating for a short period
△ △ △
○
Corrective Measures
CAUSES CORRECTIVE MEASURES
1 • U, V, W phases of wiring between amplifier
and motor is short-circuited or grounded.
• UVW phases between amplifier and motor is
not connected, or contact failure.
Check wiring between amplifier and motor. Correct
or replace wiring.
2 U, V, W phases of servomotor is
short-circuited or grounded.
Replace servomotor.
3 Faulty PC board
Faulty power module
Replace amplifier.
4 Incorrect combination of amplifier and motor Check if servomotor conforms to motor code.
Replace with correct motor if necessary.
5 Overheating of power module (IPM) • Check if cooling fan in amplifier is rotating. Replace
amplifier if fan is not operating.
• Check if temperature of control board (ambient
temperature of amplifier) is exceeding 131°F
(55℃). If exceeding, review installation and
cooling methods of amplifier to ensure temperature
stays below 55℃.
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