3. TROUBLESHOOTING FOR MR-CR55K(4) RESISTANCE REGENERATION CONVERTER UNIT
3 - 7
No.
Name/Description
Cause
Check method
Check result
Action
3A Inrush
current
suppression circuit
error
The inrush current
suppression
circuit error was
detected.
(1) Turning on and off of
the inrush relay were
repeated very
frequently.
Check if the inrush
relay is turned on and
off very frequently.
It is turned on and
off.
Check operation
pattern.
It is not turned on
and off.
Check (2).
(2)
Inrush
current
suppressor circuit is
malfunctioning.
Replace the resistance
regeneration converter
unit, and then check
the repeatability.
It is not repeatable.
Replace the
resistance
regeneration
converter unit.
45 Main circuit device
overheat
The inside of the
resistance
regeneration
converter unit
overheated.
(1) Ambient
temperature
has exceeded 55
˚
C.
Check the ambient
temperature.
It is over 55
˚
C.
Lower the ambient
temperature.
It is less than 55
˚
C. Check
(2).
(2) Turning on and off
were repeated under
the overload status.
Check if the overload
status occurred many
times.
It occurred.
Check operation
pattern.
It did not occur.
Check (3).
(3) A cooling fan, heat
sink, or openings is
clogged with foreign
matter.
Clean the cooling fan,
heat sink, or openings,
and then check the
repeatability.
It is not repeatable.
Clean it periodically.
It is repeatable.
Check (4).
(4)
The
resistance
regeneration converter
unit is malfunctioning.
Replace the resistance
regeneration converter
unit, and then check
the repeatability.
It is not repeatable.
Replace the
resistance
regeneration
converter unit.
47 Cooling fan error
The speed of the
resistance
regeneration
converter unit
cooling fan
decreased.
Or the fan speed
decreased to the
alarm occurrence
level or less.
(1) Foreign matter was
caught in the cooling
fan.
Check if a foreign
matter is caught in
the cooling fan.
Something has
been caught.
Remove the foreign
matter.
Nothing has been
caught.
Check (2).
(2) Cooling fan life expired. Check the cooling fan
speed.
The fan speed is
less than the alarm
occurrence level.
Replace the cooling
fan of the resistance
regeneration
converter unit.
The fan speed is
above the alarm
occurrence level.
Check (3).
(3) The power supply of
the cooling fan is
malfunctioning.
Check if the cooling
fan is stopping.
It is stopping.
Replace the
resistance
regeneration
converter unit.
50 Overload
1
Load exceeded
overload
protection
characteristic of
resistance
regeneration
converter unit.
(1) A current was applied
to the resistance
regeneration converter
unit in excess of its
continuous output
current.
Check the effective
load ratio.
The effective load
ratio is high.
Reduce the load.
Check operation
pattern.
51 Overload
2
Load exceeded
overload
protection
characteristic of
resistance
regeneration
converter unit.
(1) A current was applied
to the resistance
regeneration converter
unit in excess of its
output current for a
short time.
Check the effective
load ratio or peak
load ratio.
The effective load
ratio is high.
Check operation
pattern.
888 Watchdog
A part such as
CPU is
malfunctioning.
(1) Failure of the part in
the resistance
regeneration converter
unit
Replace the resistance
regeneration converter
unit, and then check
the repeatability.
It is not repeatable.
Replace the
resistance
regeneration
converter unit.
Содержание MELSERVO MR-J4-B-RJ Series
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