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Mitsubishi Electric FR-A500 Instruction Manual Page 208

Transistorized inverter.
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Operation Panel
E.ECT
Indication
Name
Wire break detection
The inverter output is stopped if the encoder signal is turned off during orientation,
Description
encoder feedback or vector control executed with the FR-A5AP.
Check point
Check for encoder signal wire break.
Corrective action
Repair wire break.
(2) Minor fault
When the protective function is activated, the output is not shut off. You can make parameter setting to
output the minor fault signal. (Set "98" in any of Pr. 190 to Pr. 195 (output terminal function selection). Refer
to page 158)
Operation Panel
Indication
Name
Fan fault
For the inverter which contains a cooling fan, FN appears on the operation panel
Description
when the cooling fan stops due to a fault or operates differently from the setting of
Pr. 244 "cooling fan operation selection".
Check point
Check the cooling fan for a fault.
Corrective action
Replace the fan.
(3) Warnings
Operation Panel
Indication
Name
Stall prevention (Over current)
During
acceleration
During constant-
Description
speed operation
During
deceleration
Check point
Check the motor for use under overload.
The acceleration time may change. Increase the stall prevention operation level with
Pr. 22 "stall prevention operation level" or disable stall prevention with Pr. 156 "stall
Corrective action
prevention operation selection".
Note: 5. The stall prevention operation current may be set as desired. It is factory-set to 150%.
FN
OL
If a current of more than 150% (Note 5) of the rated inverter
current flows in the motor, this function stops the increase in
frequency until the overload current reduces to prevent the
inverter from resulting in overcurrent shut-off. When the
overload current has reduced below 150%, this function
increases the frequency again.
If a current of more than 150% (Note 5) of the rated inverter
current flows in the motor, this function lowers the frequency
until the overload current reduces to prevent overcurrent shut-
off. When the overload current has reduced below 150%, this
function increases the frequency up to the set value.
If a current of more than 150% (Note 5) of the rated inverter
current flows in the motor, this function stops the decrease in
frequency until the overload current reduces to prevent the
inverter from resulting in overcurrent shut-off. When the
overload current has reduced below 150%, this function
decreases the frequency again.
PROTECTIVE FUNCTIONS
FR-PU04
FR-PU04
FR-PU04
199
No encoder signal
Fan fault
OL
5

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    MANUAL INVERTER MITSUBISHI a100 .thank you very much
  • sandeep Feb 15, 2014 09:20:
    good manual and it is very good to understand the contant of inverter and i lernt many things in this manual