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6-12
6-13
Possible Causes
What to Check and Suggested Measures
(3) The characteristics of
electronic thermal did not
match those of the motor
overload.
CHECK
Check the motor characteristics.
SUGGESTED ACTIONS
– Reconsider the data of function codes P99, F10 and F12.
– Use an external thermal relay.
(4) Activation level for the
electronic thermal relay
was inadequate.
CHECK
Check the continuous allowable current of the motor.
SUGGESTED ACTIONS
– Reconsider and change the data for function code F11.
[11] OLU Overload protection
Problem
Temperature inside drive rises abnormally.
Possible Causes
What to Check and Suggested Measures
(1) Temperature around
the drive exceeds drive
specifications.
CHECK
Measure the temperature around the drive.
SUGGESTED ACTIONS
– Lower the temperature (e.g. improve control board ventilation).
– Reduce the load.
(2) The service life of the
cooling fan has expired
or the cooling fan
malfunctioned.
CHECK
Check the accumulated running time of cooling fan (E52 = 2). Refer to Chapter 3, Section 3.8 “Reading
Maintenance Information.”
SUGGESTED ACTIONS
– Replace the cooling fan.
CHECK
Visually check that the cooling fan is turning normally.
SUGGESTED ACTIONS
– Replace the cooling fan.
(3) Air vent blocked.
CHECK
Check if there is sufficient clearance around the drive.
SUGGESTED ACTIONS
– Increase the clearance.
CHECK
Check if the heat sink is clogged.
SUGGESTED ACTIONS
– Clean the heat sink.
(4) Excessive load.
CHECK
Measure the output current.
SUGGESTED ACTIONS
– Reduce the load (e.g. lighten the load before overload occurs using the overload early warning (E34)).
– Decrease the carrier frequency (F26).
– Enable overload protection control (H70).
(5) Acceleration/ decelera-
tion time too short.
CHECK
Recalculate the required acceleration/deceleration torque and time using the moment of inertia for the
load and the deceleration time.
SUGGESTED ACTIONS
– Lengthen the acceleration/deceleration time (F07, F08, E10, E11 and H54).
(6) The wires to the motor
are too long resulting
in excessive leakage
current
CHECK
Measure leakage current.
SUGGESTED ACTIONS
– Connect an output circuit filter (OFL).
StockCheck.com
Содержание Fuji Electric MICRO-SAVER AF-300
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