Instruction manual

81
Errors (Alarms)
ERRORS AND PROTECTIVE FUNCTIONS
6
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 65.)
6.1.3 Warnings
When the protective function is activated, the output is not shut off.
*6:Torque limit level can be set using Pr. 22 "torque limit level" as desired. (150% with the factory setting)
Control Panel
Indication
E.ECA FR-PU04V No encoder A signal
Name
Orientation encoder no-signal
Description
The encoder pulse for the FR-V5AM or FR-A5AP is not input.
Check point
• Check that the FR-V5AM or FR-A5AP is connected correctly.
• Check for a loose connector.
• Check for a break in the cable.
• Check for a detector fault.
Corrective action
• Make connection securely.
• Change the cable.
• Replace the detector.
Control 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 encoder during offline auto tuning.
Check point
• Check for mis-wiring of the encoder cable.
• Check for wrong setting of Pr. 852 "encoder rotation direction".
Corrective action
• Perform connection and wiring securely.
• Change the Pr. 852 "encoder rotation direction" value.
Control Panel
Indication
FN FR-PU04V Fan Failure
Name
Fan fault
Description
For the inverter that contains a cooling fan, appears on the control 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.
Control Panel
Indication
OL FR-PU04V OL
Name
Stall prevention (overcurrent)
Description
V/F control
Output if the inverter output current exceeds torque limit level(*6).
(Refer to page 34.).
Speed
control
• Output if the output torque exceeds the torque limit level (*6).
• Output if the encoder 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 encoder pulses" and Pr. 852 "encoder rotation direction"
values are correct.
Corrective action
• Increase the operation level using torque limit level (analog input or parameter input).
• Check for the Pr. 851 "number of encoder pulses" and Pr. 852 "encoder rotation direction" values.
Control 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".