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Errors (Alarms)
6.1.2 Minor fault
If the protective function is activated, the output is not shut off. You can also output a minor fault signal by making
parameter setting. (Set "98" in any of Pr. 190 to Pr. 192 and Pr. 195 (output terminal function selection). Refer to
page 61.)
6.1.3 Warnings
When the protective function is activated, the output is not shut off.
*5:Torque restriction level can be set using Pr. 22 "torque restriction level" as desired. (150% with the factory setting)
Operation Panel
Indication
E.EP FR-PU04V E.EP
Name
Encoder mis-wiring detection
Description
The rotation command of the inverter differs from the actual motor rotation direction detected from
the PLG during offline auto tuning.
Check point
• Check for mis-wiring of the PLG cable.
• Check for wrong setting of Pr. 852 "PLG rotation direction".
Corrective action
• Perform connection and wiring securely.
• Change the Pr. 852 "PLG rotation direction" value.
Operation Panel
Indication
FN FR-PU04V Fan Failure
Name
Fan fault
Description
For the inverter that contains a cooling fan, appears on the operation panel when the
cooling fan stops due to a fault or different operation from the setting of Pr. 244 "cooling fan
operation selection".
Check point
Check the cooling fan for a fault.
Corrective action
Replace the fan.
Operation Panel
Indication
OL FR-PU04V OL
Name
Stall prevention (overcurrent)
Description
V/F control
Output if the inverter output current exceeds torque restriction level.
(Refer to page 33.).
Speed
control
• Output if torque restriction level is exceeded.
• Output if the PLG setting is wrong.
Position
control
Check point
• Check the motor for use under overload.
• The acceleration/deceleration time may vary during V/F control. Check that the Pr. 0 "torque
boost" setting is not higher than required.
• Check that the Pr. 851 "number of PLG pulses" and Pr. 852 "PLG rotation direction" values are
correct.
Corrective action
• Increase the operation level using torque restriction level (analog input or parameter input).
• Check for the Pr. 851 "number of PLG pulses" and Pr. 852 "PLG rotation direction" values.
Operation Panel
Indication
oL FR-PU04V oL
Name
Stall prevention (overvoltage)
Description
During
deceleration
If the regenerative energy of the motor becomes excessive to exceed the brake
capability, this function stops the decrease in frequency to prevent overvoltage shut-
off. As soon as the regenerative energy has reduced, deceleration resumes.
Check point
Check for sudden speed reduction.
Corrective action
The deceleration time may change.
Increase the deceleration time using Pr. 8 "deceleration time".
Operation Panel
Indication
PS FR-PU04V PS
Name
PU stop
Description
Appears when a stop was made by pressing of the operation panel or parameter unit (FR-
PU04V) during operation in the external operation mode with the Pr. 75 "reset selection/PU stop
selection" setting.
Check point
Check for a stop made by pressing of the operation panel during external operation.
Corrective action
Refer to page 79.
STOP
RESET
STOP
RESET