6-18
Possible Causes
What to Check and Suggested Measures
Check if there is sufficient clearance around the inverter.
Î
Ensure the clearance.
(5) Ventilation paths are
blocked.
Check if the heat sink is not clogged.
Î
Clean the heat sink.
Check the cumulative run time of the cooling fan. Refer to Chapter
3, Section 3.4.5 "Reading maintenance information – "Maintenance
Information"."
Î
Replace the cooling fan.
(6) Service life of cooling
fan has expired or
cooling fan is faulty.
Visually check whether the cooling fan rotates normally.
Î
Replace the cooling fan.
(7) The wires to the motor
are too long, causing a
large leakage current
from them.
Measure the leakage current.
Î
Insert an output circuit filter (OFL).
[ 12 ]
er1
Memory error
Problem
Error occurred in writing data to the inverter memory.
Possible Causes
What to Check and Suggested Measures
(1) During writing of
function code data
(especially during
initialization or data
copying), the inverter
was shut down so that
the voltage to the control
PCB has dropped.
Initialize the function code data with H03 (= 1). After initialization,
check if pressing the
key resets the alarm.
Î
Revert the initialized function code data to their previous
settings, then restart the operation.
(2) Inverter affected by
strong electrical noise
when writing data
(especially initializing
or copying data).
Check if appropriate noise control measures have been
implemented (e.g., correct grounding and routing of control and
main circuit wires). Also, perform the same check as described in
(1) above.
Î
Implement noise control measures. Revert the initialized function
code data to their previous settings, then restart the operation.
(3) Any error in control
circuit.
Initialize the function code data by setting H03 to "1," then reset the
alarm by pressing the
key and check that the alarm goes on.
Î
The control PCB (on which the CPU is mounted) is defective.
Contact your Fuji Electric representative.