Mitsubishi Electric 800 Series Instruction Manual page 31

 Safety circuit fault (Safety communication model)
Operation panel
indication
When a fault related to functional safety occurs, the inverter output is shut off by the protective function. For
Description
details, refer to the FR-E800-SCE Instruction Manual (Functional Safety).
Reference FR-E800-SCE Instruction Manual (Functional Safety)
 Overspeed occurrence
Operation panel
indication
The inverter output is shut off when the motor speed exceeds the Pr.374 Overspeed detection level under Real
Description sensorless vector control and PM sensorless vector control. This protective function is not available in the initial
status.
Check point • Check that the Pr.374 setting is correct.
Corrective action • Set the Pr.374 correctly.
Reference FR-E800 Instruction Manual (Function)
 Speed deviation excess detection
Operation panel
indication
• When Pr.285 Speed deviation excess detection frequency is set during PM sensorless vector control, the
Description inverter output is shut off if the motor speed is increased or decreased by factors such as influence of the load
and cannot be controlled in accordance with the speed command value.
• Check that the settings of Pr.285 and Pr.853 Speed deviation time are correct.
Check point
• Check for sudden load change.
• Set Pr.285 and Pr.853 correctly.
Corrective action
• Keep the load stable.
Reference FR-E800 Instruction Manual (Function)
 Brake sequence fault
Operation panel
indication
The inverter output is shut off when a sequence error occurs during use of the brake sequence function (Pr.278
Description
to Pr.283). This protective function is not available in the initial status. (The brake sequence function is invalid.)
Check point Find the cause of the fault occurrence.
Corrective action Check the set parameters and perform wiring properly.
Reference FR-E800 Instruction Manual (Function)
E.SAF
E.OS
E.OSD
E.MB4 to 7
FR-LU08 indication safety circuit fault
FR-LU08 indication Overspeed occurrence
FR-LU08 indication Spd deviation fault
to
FR-LU08 indication E.MB4 Fault to E.MB7 Fault
2. Protective Functions
2.5 Causes and corrective actions
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