4-4
Errors during tuning
Improper tuning would negatively affect the operation performance and, in the worst case,
could even cause hunting or deteriorate precision. Therefore, if the inverter finds any
abnormality in the results of the tuning or any error in the process of the tuning, it will
display
er7
and discard the tuning data.
Listed below are the abnormal or error conditions that can be recognized during tuning.
Abnormal/error
condition
Description
Abnormal result
of tuning
An inter-phase unbalance has been detected;
Tuning has resulted in an abnormally high or low value of a parameter.
Abnormal
output current
An abnormally high current has been caused during tuning.
Sequence error
During tuning, the run command has been turned OFF, or forced STOP,
coast-to-stop command
BX
, dew condensation protection
DWP
, or a
similar abnormal command has been received.
Limitation
exceeded
During tuning, a certain limitation has been reached or exceeded;
The maximum output frequency or the peak limiter for output frequency has
been reached or exceeded.
Other alarm
condition
An undervoltage or an alarm has been occurred.
If any of these conditions has occurred, either eliminate the abnormal or error factor(s) and
perform tuning again, or contact your Fuji Electric representative.
If a filter other than Fuji optional output filter (OFL-
-4A) is connected to
the inverter's output (secondary) circuit, the result of tuning can be
unpredictable. When you replace an inverter, take note of the old inverter’s
settings for the primary resistance %R1, leakage reactance %X, no-load
current, and rated slip frequency, and set those values to the new inverter’s
function codes.
4.1.4 Test
run
If the user set the function codes wrongly or without completely understanding this Instruction
Manual and the FRENIC-Multi User's Manual (MEH457), the motor may rotate with a torque or at
a speed not permitted for the machine.
Accident or injury may result.
Follow the descriptions of the previous Section 4.1.1, "Inspection and preparation prior to powering
on" to Section 4.1.3, "Preparation before running the motor for a test," and begin test-driving of the
motor.
If any abnormality is found to the inverter or motor, immediately stop operation and determine the
cause referring to Chapter 6, "TROUBLESHOOTING."
Summary of Contents for FRENIC-Multi series
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