Mitsubishi Electric 800 Series Instruction Manual page 21

 Maintenance timer
Operation panel
indication
Appears when the inverter's cumulative energization time reaches or exceeds the parameter set value. Set the
Description time until the MT is displayed using Pr.504 Maintenance timer warning output set time (MT). "MT" does not
appear when the setting of Pr.504 is the initial value ("9999").
Check point The set time of maintenance timer has been exceeded.
Take appropriate countermeasures according to the purpose of the maintenance timer setting.
Corrective action
Setting "0" in Pr.503 Maintenance timer clears the indication.
Reference FR-E800 Instruction Manual (Function)
 Continuous operation during communication fault
Operation panel
indication
Appears when the operation continues while an error is occurring in the communication line or communication
Description
option (when Pr.502 = "6").
• Check for a break in the communication cable.
Check point
• Check for communication option faults.
• Check the connection of communication cable.
Corrective action
• Replace the communication option.
Reference FR-E800 Instruction Manual (Function)
 Load fault warning
Operation panel
indication
Appears when the load is deviated from the detection width set in Pr.1488 Upper limit warning detection width
Description
or Pr.1489 Lower limit warning detection width.
• Check if too much load is applied to the equipment, or if the load is too light.
Check point
• Check that the load characteristics settings are correct.
• Inspect the equipment.
Corrective action
• Set the load characteristics (Pr.1481 to Pr.1487) correctly.
Reference FR-E800 Instruction Manual (Function)
 Ethernet communication fault
Operation panel
indication
Appears when Ethernet communication is interrupted by physical factors while Pr.1431 Ethernet signal loss
Description
detection function selection = "1 to 3".
• Check for a break in the communication cable.
Check point
• Check for a break in the Ethernet cable.
• Connect the Ethernet board securely.
Corrective action • Check that the Ethernet cable is connected to the Ethernet connector properly and the Ethernet cable is not
damaged.
Reference FR-E800 Instruction Manual (Communication)
 Duplicate IP address
Operation panel
indication
Description Appears when duplicate IP address is detected.
Check point Check that the specified IP address is not overlapping with the IP address of any other device on the network.
Corrective action Enter a unique IP address.
Reference FR-E800 Instruction Manual (Communication)
 IP address fault
Operation panel
indication
Description Appears when the IP address or the subnet mask is out of the specified range.
• Check that "0 or 255" is not set in the third or fourth octet of the IP address.
Check point • Check that the subnet mask setting is appropriate.
• Check that the IP address settings are correct.
• Set "1 to 254" in the third or fourth octet of the IP address.
Corrective action • Set the subnet mask (Pr.1438 to Pr.1441) correctly.
• Set the IP address (Pr.1434 to Pr.1447) correctly.
Reference FR-E800 Instruction Manual (Communication)
MT
CF
LDF
EHR
DIP
IP
FR-LU08 indication MT
FR-LU08 indication CF
FR-LU08 indication LDF
FR-LU08 indication EHR
FR-LU08 indication DIP
FR-LU08 indication IP
2.5 Causes and corrective actions
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2. Protective Functions