Mitsubishi Electric MR-J2S-*B Series Instruction Manual page 134

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