Mitsubishi Electric MELSERVO-J4 Instruction Manual page 151

3. TROUBLESHOOTING FOR MR-CR55K(4) RESISTANCE REGENERATION CONVERTER UNIT
No. Name/Description
37 Parameter error
Parameter setting
value is incorrect.
38 MC drive circuit
error
Magnetic
contactor drive
circuit is
malfunctioning.
The main circuit
power supply is
not supplied even
if the magnetic
contactor output is
turned on.
The main circuit
power supply is
supplied even if
the magnetic
contactor output is
turned off.
39 Open phase
The wirings of
L1/L2/L3 are
incorrect.
Cause
(1) A parameter was set
out of setting range.
(2) Regenerative resistor
(regenerative option)
not used with
resistance regeneration
converter unit was set
in [Pr. PA01].
(3) The number of write
times to EEP-ROM
exceeded 100,000 due
to parameter write, etc.
(4) The parameter setting
value has changed due
to a resistance
regeneration converter
unit malfunction.
(1) The connection to the
magnetic contactor
connector (CNP1) is
incorrect.
(2) The setting value of
[Pr. PA02 Magnetic
contactor drive output
selection] contradicts
the wiring constitution.
(3) The voltage of the main
circuit power supply is
low.
(4) The magnetic contactor
failed.
(5) Magnetic contactor
drive circuit is
malfunctioning.
(6) A part in the resistance
regeneration converter
unit is failure.
(1) Any of the wirings
L1/L2/L3 is
disconnected. Or,
disconnected.
(2) A part in the resistance
regeneration converter
unit is failure.
3 - 6
Check method Check result
Check the parameter It is out of setting
setting. range.
It is within the
setting range.
Check the The setting value is
regenerative resistor incorrect.
(regenerative option)
and [Pr. PA01] setting
It is set correctly.
value.
Check if parameters It was changed.
have been used very
frequently.
It was not changed.
Replace the resistance It is not repeatable.
regeneration converter
unit, and then check
the repeatability.
Check the output of It is not correct.
magnetic contactor
control connector
(CNP1).
(Power supply voltage
It is correct.
is applied to this
connector. Take care
to avoid an electric
shock at connecting.)
Check the [Pr. PA02] The setting or wiring
setting and the wiring is incorrect.
constitution.
The setting and
wiring are correct.
Check if the bus The bus voltage is
voltage is lower than lower than the
the prescribed value. prescribed value.
200 V class: 215 V DC
The bus voltage is
400 V class: 430 V DC the prescribed value
or higher.
Replace the magnetic It is not repeatable.
contactor, and then
check the
It is repeatable.
repeatability.
Replace the resistance It is not repeatable.
regeneration converter
unit, and then check
the repeatability.
Replace the resistance It is not repeatable.
regeneration converter
unit, and then check
the repeatability.
Check if the wirings of It has a failure.
L1/L2/L3 are
incorrect.
It has no failure.
Replace the resistance It is not repeatable.
regeneration converter
unit, and then check
the repeatability.
Action
Set it within the
range.
Check (2).
Set it correctly.
Check (3).
Replace the
resistance
regeneration
converter unit.
Change the process
to use parameters
less frequently after
replacement.
Check (4).
Replace the
resistance
regeneration
converter unit.
Connect it correctly.
Check (2).
Review the
[Pr. PA02] setting.
Check (3).
Increase the voltage
of the main circuit
power supply.
Check (4).
Replace the
magnetic contactor.
Check (5).
Replace the
resistance
regeneration
converter unit.
Replace the
resistance
regeneration
converter unit.
Review the wiring.
Check (2).
Replace the
resistance
regeneration
converter unit.