Mitsubishi Electric FR-V500 Series Instruction Manual page 84

Control Panel
Indication
Name
Orientation encoder no-signal
Description The encoder pulse for the FR-V5AM or FR-A5AP is not input.
• Check that the FR-V5AM or FR-A5AP is connected correctly.
• Check for a loose connector.
Check point
• Check for a break in the cable.
• Check for a detector fault.
• Make connection securely.
Corrective action • Change the cable.
• Replace the detector.
Control Panel
Indication
Name
Encoder mis-wiring detection
The rotation command of the inverter differs from the actual motor rotation direction detected from
Description
the encoder during offline auto tuning.
• Check for mis-wiring of the encoder cable.
Check point
• Check for wrong setting of Pr. 852 "encoder rotation direction".
• Perform connection and wiring securely.
Corrective action
• Change the Pr. 852 "encoder rotation direction" value.
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.)
Control Panel
Indication
Name Fan fault
For the inverter that contains a cooling fan,
Description
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.
6.1.3 Warnings
When the protective function is activated, the output is not shut off.
Control Panel
Indication
Name
Stall prevention (overcurrent)
V/F control
Speed
Description
control
Position
control
• Check the motor for use under overload.
• The acceleration/deceleration time may vary during V/F control. Check that the Pr. 0 "torque
Check point
• Check that the Pr. 851 "number of encoder pulses" and Pr. 852 "encoder rotation direction"
• Increase the operation level using torque limit level (analog input or parameter input).
Corrective action
• Check for the Pr. 851 "number of encoder pulses" and Pr. 852 "encoder rotation direction" values.
*6:Torque limit level can be set using Pr. 22 "torque limit level" as desired. (150% with the factory setting)
Control Panel
Indication
Name
Stall prevention (overvoltage)
During
Description
deceleration
Check point
Check for sudden speed reduction.
The deceleration time may change.
Corrective action
Increase the deceleration time using Pr. 8 "deceleration time".
E.ECA
E.EP
FN
OL
Output if the inverter output current exceeds torque limit level(*6).
(Refer to page 34.).
• Output if the output torque exceeds the torque limit level (*6).
• Output if the encoder setting is wrong.
boost" setting is not higher than required.
values are correct.
oL
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.
FR-PU04V No encoder A signal
FR-PU04V E.EP
FR-PU04V Fan Failure
appears on the control panel when the cooling
FR-PU04V OL
FR-PU04V oL
81
Errors (Alarms)
6