Mitsubishi Electric MELSERVO MR-J4-B-RJ Series, Instruction Manual

Page: 151 / 174

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