2. TROUBLESHOOTING FOR MR-CV_POWER REGENERATION CONVERTER UNIT
2 - 3
No.
Name/Description
Cause
Check method
Check result
Action
62 Frequency
error
The frequency of
the input power
supply exceeds
the permissible
range.
(1) The frequency of the
input power supply is
out of the
specifications.
Check if the normal
power supply voltage
waveform is within 50
Hz ± 3% or 60 Hz ±
3%.
It is out of range.
Check the power
supply.
It is within range.
Check (2).
(2) The power supply
voltage is unstable
during operation.
Measure the power
supply voltage at
motor acceleration/
deceleration.
The frequency
fluctuation at
acceleration/
deceleration is
large.
Check the power
supply.
It has no failure.
Check (3).
(3) Something near the
device caused it.
Check the noise,
grounding, etc.
It has a failure.
Take
countermeasures
against its cause.
It has no failure.
Check (4).
(4)
The
power
regeneration converter
unit is malfunctioning.
Replace the power
regeneration converter
unit, and then check
the repeatability.
It is not repeatable.
Replace the power
regeneration
converter unit.
66 Process
error
The process did
not complete
within the
specified time.
(1) Something near the
device caused it.
Check the power
supply for noise.
Check if the connector
is shorted.
It has a failure.
Take
countermeasures
against its cause.
It has no failure.
Check (2).
(2)
The
power
regeneration converter
unit is malfunctioning.
Replace the power
regeneration converter
unit, and then check
the repeatability.
It is not repeatable.
Replace the power
regeneration
converter unit.
67 Open
phase
The wirings of L1,
L2, and L3 are
incorrect.
(1) Any of the wirings L1,
L2, and L3 is not
connected. Or, it is
disconnected.
Check if the wirings of
L1, L2, and L3 are
incorrect.
It has a failure.
Review the wiring.
It has no failure.
Check (2).
(2) A part in the power
regeneration converter
unit is malfunctioning.
Replace the power
regeneration converter
unit, and then check
the repeatability.
It is not repeatable.
Replace the power
regeneration
converter unit.
68 Watchdog
A part such as
CPU is
malfunctioning.
(1) A part in the power
regeneration converter
unit is malfunctioning.
Replace the power
regeneration converter
unit, and then check
the repeatability.
It is not repeatable.
Replace the power
regeneration
converter unit.
69 Ground
fault
A ground fault
occurred on the
servo motor
power lines.
(1) A ground fault occurred
at the servo motor
power cable.
Check if only the servo
motor power cable is
shorted.
A ground fault is
occurring.
Replace the servo
motor power cable.
A ground fault is not
occurring.
Check (2).
(2) A ground fault occurred
at the servo motor.
Check if the servo
motor power cables on
motor side (U, V, and
W) and grounding are
insulated.
A ground fault is
occurring.
Replace the servo
motor.
A ground fault is not
occurring.
Check (3).
(3) The servo amplifier is
malfunctioning.
Replace the servo
amplifier, and then
check the
repeatability.
It is not repeatable.
Replace the servo
amplifier.
It is repeatable.
Check (4).
(4)
The
power
regeneration converter
unit is malfunctioning.
Replace the power
regeneration
converter unit, and
then check the
repeatability.
It is not repeatable.
Replace the power
regeneration
converter unit.
Содержание MELSERVO MR-J4-B-RJ Series
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