Mitsubishi A1SD75M3

14 - 26
MELSEC-A
14 TROUBLESHOOTING
14.2.2 Errors detected by MR-H-B (MR-H-BN)
Error
code
Servo
amplifier
LED display
Name Definition Occurrence factor
1. Power supply voltage is low.
2. Power failed instantaneously.
In case of MR-H700BN or less: 15ms or more
In case of MR-H11KBN or less: 10ms or more
3. Shortage of power supply capacity caused the power supply
voltage to drop at start, etc.
4. Power switched ON within 5s after it had switched OFF.
2010 10 Undervoltage
Power supply voltage
dropped.
160VAC or less
5. Faulty parts in the servo amplifier.
2012 12 Memory error 1
RAM, ROM memory
fault
2013 13 Clock error Printed board fault
2014 14 Watchdog CPU part fault
2015 15 Memory error 2 E
2
PROM fault
Faulty parts in the servo amplifier.
1. Encoder connector disconnected.
2. Servomotor encoder faulty.
2016 16 Encoder error 1
Communication error
occurred between
encoder and servo
amplifier.
3. Encoder cable faulty (open cable or short circuit)
2017 17 Board error CPU/parts fault
2019 19 Memory error 3 Flash memory fault
Faulty parts in the servo amplifier
2020 1A
Motor
combination
error
Motor combination error
When using HC-MF, HA-FF, HC-SF or HC-UF series servomotor,
improper motor was connected with servo amplifier.
1. Encoder connector disconnected.
2020 20 Encoder error 2
Communication error
occurred between
encoder and servo
amplifier.
2. Encoder cable faulty (open cable or short circuit)
1. Power input cable and servomotor output cable are making
contact at the main circuit terminal block (TE1).
2024 24 Ground fault
Ground fault occurred at
the servomotor outputs
(U, V and W phases) of
the servo amplifier.
2. Servomotor power cable insulation deteriorated.
1. Reduced voltage of super capacitor in encoder
2. Battery voltage low
2025 25
Absolute
position erase
Absolute position data in
error
3. Battery cable or battery is faulty.