Mitsubishi Electric Melservo-J4 Instruction Manual page 152

No. Name/Description
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.
3A Inrush current suppression
circuit error
• The inrush current
suppression circuit error
was detected.
45 Main circuit device overheat
• The inside of the resistance
regeneration converter unit
overheated.
3 TROUBLESHOOTING FOR MR-CR55K(4) RESISTANCE REGENERATION CONVERTER UNIT
150
3.3 Remedies for alarms
Cause Check method
(1) The connection to the Check the output of
magnetic contactor magnetic contactor
connector (CNP1) is control connector
incorrect. (CNP1).
(Power supply voltage is
applied to this connector.
Take care to avoid an
electric shock at
connecting.)
(2) The setting value of [Pr. Check the [Pr. PA02]
PA02 Magnetic setting and the wiring
contactor drive output constitution.
selection] contradicts
the wiring constitution.
(3) The voltage of the main Check if the bus voltage
circuit power supply is is lower than the
low. prescribed value.
200 V class: 215 V DC
400 V class: 430 V DC
(4) The magnetic contactor Replace the magnetic
failed. contactor, and then
check the repeatability.
(5) Magnetic contactor Replace the resistance
drive circuit is regeneration converter
malfunctioning. unit, and then check the
repeatability.
(6) A part in the resistance Replace the resistance
regeneration converter regeneration converter
unit is failure. unit, and then check the
repeatability.
(1) Any of the wirings L1/ Check if the wirings of
L2/L3 is disconnected. L1/L2/L3 are incorrect.
Or, disconnected.
(2) A part in the resistance Replace the resistance
regeneration converter regeneration converter
unit is failure. unit, and then check the
repeatability.
(1) Turning on and off of Check if the inrush relay
the inrush relay were is turned on and off very
repeated very frequently.
frequently.
(2) Inrush current Replace the resistance
suppressor circuit is regeneration converter
malfunctioning. unit, and then check the
repeatability.
(1) Ambient temperature Check the ambient
has exceeded 55 .
temperature.
(2) Turning on and off were Check if the overload
repeated under the status occurred many
overload status. times.
(3) A cooling fan, heat sink, Clean the cooling fan,
or openings is clogged heat sink, or openings,
with foreign matter. and then check the
repeatability.
(4) The resistance Replace the resistance
regeneration converter regeneration converter
unit is malfunctioning. unit, and then check the
repeatability.
Check result Action
It is not correct. Connect it correctly.
It is correct. Check (2).
The setting or wiring is Review the [Pr. PA02]
incorrect. setting.
The setting and wiring Check (3).
are correct.
The bus voltage is lower Increase the voltage of
than the prescribed the main circuit power
value. supply.
The bus voltage is the Check (4).
prescribed value or
higher.
It is not repeatable. Replace the magnetic
contactor.
It is repeatable. Check (5).
It is not repeatable. Replace the resistance
regeneration converter
unit.
It is not repeatable. Replace the resistance
regeneration converter
unit.
It has a failure. Review the wiring.
It has no failure. Check (2).
It is not repeatable. Replace the resistance
regeneration converter
unit.
It is turned on and off. Check operation pattern.
It is not turned on and off. Check (2).
It is not repeatable. Replace the resistance
regeneration converter
unit.
It is over 55 . Lower the ambient
temperature.
It is less than 55 .
Check (2).
It occurred. Check operation pattern.
It did not occur. Check (3).
It is not repeatable. Clean it periodically.
It is repeatable. Check (4).
It is not repeatable. Replace the resistance
regeneration converter
unit.