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Mitsubishi Electric FR-E520 Instruction Manual Page 143

Transistorized inverter.
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4) Error display definitions
Error Display
9
Inverter trip
Current limit (stall prevention) function was
91
activated.
Converter output voltage reached 75% of
92
rated value.
93
Calculation error
No connection with motor will result in a calculation (93) error.
5) When tuning was forced to end
An forced end occurs when you forced the tuning to end by pressing the
or switching off the start signal (STF or STR) during tuning.
In this case, the offline auto tuning has not ended normally.
(The motor constants are not set.)
Reset the inverter and restart the tuning.
Note: 1. The R1 motor constant measured during the offline auto tuning is stored as a
parameter and its data is held until the offline auto tuning is performed again.
2. An instantaneous power failure occurring during tuning will result in a tuning
error.
After power is restored, the inverter goes into the ordinary operation mode.
Therefore, when STF (STR) is on, the motor runs in forward (reverse)
rotation.
3. Any alarm occurring during tuning is handled as in the ordinary mode. Note
that if an error retry has been set, retry is ignored.
4. The set frequency monitor displayed during the offline auto tuning is 0Hz.
When the offline auto tuning is used for an elevating machine, e.g. a lifter,
it may drop due to insufficient torque.
Error Cause
CAUTION
133
PARAMETERS
Remedy
Make setting again.
Increase
acceleration/deceleration time.
Set "1" in Pr. 156.
Check for fluctuation of power
supply voltage.
Check the motor wiring and
make setting again.
STOP
key
RESET
4

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