Mitsubishi Electric 800 Series Instruction Manual page 29

 PU disconnection
Operation panel
indication
• The inverter output is shut off if communication between the inverter and PU is suspended, e.g. the cable is
disconnected from the PU connector, when the disconnected PU detection function is valid in Pr.75 Reset
selection/disconnected PU detection/PU stop selection.
• The inverter output is shut off if communication errors occurred consecutively for more than permissible
Description
number of retries when Pr.121 PU communication retry count ≠ "9999" during the RS-485 communication.
• The inverter output is shut off if communication is broken within the period of time set in Pr.122 PU
communication check time interval during the RS-485 communication via the PU connector. (This protective
function is available for the standard model.)
Check point Check the Pr.75 setting.
Corrective action Change the Pr.75 setting.
Reference FR-E800 Instruction Manual (Function)
 Retry count excess
Operation panel
indication
The inverter output is shut off if the operation cannot be resumed properly within the number of retries set in
Description Pr.67 Number of retries at fault occurrence. This function is available when Pr.67 is set. This protective
function is not available in the initial setting (Pr.67 = "0").
Check point Find the cause of the fault occurrence.
Corrective action Eliminate the cause of the fault preceding this fault indication.
Reference FR-E800 Instruction Manual (Function)
 Parameter storage device fault (main circuit board)
Operation panel
indication
Description The inverter output is shut off if a fault occurs in the inverter model information.
Check point ――――
Corrective action Contact your sales representative.
 CPU fault
Operation panel
indication
Description The inverter output is shut off if the communication fault of the built-in CPU occurs.
• Check for devices producing excess electrical noises around the inverter.
Check point
• When Ethernet communication is used, check that the communication cable is connected properly.
• Take measures against noises if there are devices producing excess electrical noises around the inverter.
Corrective action • When Ethernet communication is used, connect the communication cable properly.
• Contact your sales representative.
• FR-E800 Instruction Manual (Function)
Reference
• FR-E800 Instruction Manual (Communication)
E.PUE
E.RET
E.PE2
E.CPU
E. 5
E. 6
E. 7
FR-LU08 indication PU disconnection
FR-LU08 indication Retry count excess
FR-LU08 indication PR storage alarm
CPU fault
Fault 5
FR-LU08 indication
Fault 6
Fault 7
2.5 Causes and corrective actions
1
2
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5
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7
8
9
10
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2. Protective Functions