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List of fault or alarm indications
∗1 Resetting the inverter initializes the internal cumulative heat value of the electronic thermal relay function.
∗2 The error message shows an operational error. The inverter output is not shut off.
∗3 Warnings are messages given before fault occur. The inverter output is not shut off.
∗4 Alarms warn the operator of failures with output signals. The inverter output is not shut off.
∗5 When faults occur, the protective functions are activated to trip the inverter and output the fault signals.
∗6 This protective function does not function in the initial status.
∗7 This protective function activates when Pr.872 Input phase loss protection selection = "1".
∗8 This function is only available for three-phase power input models.
Fault
∗5
Communication option
fault
Stops inverter outputs at a communication line
error of CC-Link communication.
y Refer to "Error check with LEDs" in the Instruction Manual
(Applied), and take a corrective action for the error.
y Check the connection of the CC-Link dedicated cable.
y Check that each CC-Link dedicated cable length between
nodes is within the specified value.
(Refer to the User's Manual of the CC-Link master module
for the cable length between the nodes compatible with the
CC-Link Ver.1.00.)
y Set the built-in terminating resistor switch to ON at the end
stations. Alternatively, correctly connect the one-touch
connector plug with terminating resistor.
Option fault y Appears when Pr.296 = "0 or 100."
y Set Pr.296 ≠ "0 or 100" for the password lock.
y If the problem still persists after taking the above measure,
contact your sales representative.
Option fault
y Stops the inverter output if there is excess
electrical noise around the inverter.
y Also appears when a switch for manufacturer
setting is changed.
y Take measures against noises if there are devices producing
excess electrical noises around the inverter.
y Set back the switch for manufacturer setting in the initial
setting.
y If the problem still persists after taking the above measure,
contact your sales representative.
Parameter storage
device fault
Appears when operation of the element where
parameters stored became abnormal. (control
board)
Please contact your sales representative.
When performing parameter write frequently for
communication purposes, set "1" in Pr. 342 to enable RAM
write. Note that powering OFF returns the inverter to the status
before RAM write.
Internal board fault
Inverter output is stopped when the control
circuit board and the main circuit board do not
match with each other.
Please contact your sales representative.
(For parts replacement, consult the nearest Mitsubishi FA
Center.)
Retry count excess ∗6
Operation restart within the set number of retries
has failed.
Eliminate the cause of the error preceding this error indication.
CPU fault
Appears during the CPU and peripheral circuit
errors.
y Take measures against noises if there are devices producing
excess electrical noises around the inverter.
y Check the connection between terminals PC and SD. (E6/
E7)
y Please contact your sales representative.
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Brake sequence fault ∗6
Stops inverter outputs when a sequence fault
occurs while using the brake sequence function
(Pr. 278 to Pr. 283).
Check the parameters and correct the wiring.
Inrush current limit
circuit fault
Appears when the resistor of the inrush current
limit circuit overheated.
Configure a circuit where frequent power ON/OFF is not
repeated.
If the problem still persists after taking the above measure,
please contact your sales representative.
Internal circuit fault
Appears when an internal circuit fault has
occurred.
Please contact your sales representative.
Safety circuit fault Appears when safety circuit is malfunctioning.
y When not using the safety stop function, short across
terminals S1 and PC and across S2 and PC with shorting
wire.
y When using the safety stop function, check that wiring of
terminal S1, S2 and PC is correct and the safety stop input
signal source such as safety relay module is operating
properly. Refer to the Safety stop function instruction manual
(BCN-211508-004) for causes and countermeasures.
(Please contact your sales representative for the manual.)
Function Name Description Corrective action Display
to