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9. TROUBLESHOOTING
Display Name Definition Cause Action
1. Faulty parts in the servo amplifier
Checking method
Alarm (15) occurs if power is
switched on after disconnection
of all cables but the control
circuit power supply cables.
15 Memory error 2 EEP-ROM fault
2. The number of write times to EEP-
ROM exceeded 100,000.
Change the servo amplifier.
1. Encoder connector (CN2)
disconnected.
Connect correctly.
2. Encoder fault Change the servo motor.
16 Encoder error 1 Communication
error occurred
between encoder
and servo amplifier.
3. Encoder cable faulty
(Wire breakage or shorted)
Repair or change cable.
17 Board error 2 CPU/parts fault
19 Memory error 3 ROM memory fault
Faulty parts in the servo amplifier
Checking method
Alarm (17 or 19) occurs if power
is switched on after disconnection
of all cable but the control circuit
power supply cable.
Change the servo amplifier.
1A Motor
combination
error
Wrong combination
of servo anplifier
and servo motor.
Wrong combination of servo
amplifier and servo motor connected.
Use correct combination.
1. Encoder connector (CN2)
disconnected.
Connect correctly.
2. Encoder fault Change the servo motor.
20 Encoder error 2 Communication
error occurred
between encoder
and servo amplifier.
3. Encoder cable faulty
(Wire breakage or shorted)
Repair or change cable.
1. Power input wires and servo motor
output wires are in contact at
main circuit terminal block (TE1).
Connect correctly.
2. Sheathes of servo motor power
cables deteriorated, resulting in
ground fault.
Change the cable.
24 Main circuit
error
Ground fault
occurred at the
servo motor outputs
(U,V and W phases)
of the servo
amplififer.
3. Main circuit of servo amplifier
failed.
Checking method
Alarm (24) occurs if the servo is
switched on after disconnecting
the U, V, W power cables from
the servo amplifier.
Change the servo amplifier.
1. Battery voltage lowAbsolute position
data in error
2. Battery cable or battery is faulty.
Change battery.
Always make home position setting again.
25 Absolute
position erase
Power was switched
on for the first time
in the absolute
position detection
system.
3. Super capacitor of the absolute
position encoder is not charged
After leaving the alarm occurring for a few
minutes, switch power off, then on again.
Always make home position setting again.