Mitsubishi Electric FR-D700 Series Instruction Manual page 43

Function Name
The external thermal relay connected to the OH
External thermal relay
operation
signal has been activated.
Resistance of the PTC thermistor connected
between the terminal 2 and terminal 10 has
PTC thermistor operation

reached the Pr. 561 PTC thermistor protection level
setting value or higher.
Operation of the component where parameters
Parameter storage
are stored (control circuit board) has become
device fault
abnormal.
 A communication error has occurred between
the PU and the inverter.
 The communication interval has exceeded the
PU disconnection permissible time period during RS-485
communication via the PU connector.
 The number of communication errors has
exceeded the number of retries.
Operation restart within the set number of retries
Retry count excess
has failed.
An error has occurred in the CPU and in the
CPU fault
peripheral circuits.
Output current has exceeded the output current
Output current detection
value exceeded
detection level, which was set in a parameter.
The resistor of the inrush current limit circuit has
Inrush current limit
circuit fault
overheated.
A voltage (current) has been input to terminal 4
when the setting in Pr. 267 Terminal 4 input
Analog input fault
selection and the setting of voltage/current input
switch are different.
While a safety circuit fault is occurring, the
Safety circuit fault terminals across S1 and PC, or across S2 and
PC are opened.
If faults other than the above appear, contact your sales representative.
 Resetting the inverter initializes the internal cumulative heat value of the electronic thermal relay function.
 This protective function does not function in the initial status.
 This protective function is available with the three-phase power input specification model only.
Description
 Reduce the load and operate less frequently.
 Even if the relay contacts are reset automatically, the inverter
will not restart unless it is reset.
Reduce the load.
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.
 Connect the parameter unit cable securely.
 Check the communication data and communication settings.
 Increase the Pr. 122 PU communication check time interval setting.
Or set "9999" (no communication check).
Eliminate the cause of the error preceding this error indication.
 Take measures against noises if there are devices producing
excess electrical noises around the inverter.
 If the situation does not improve after taking the above
measure, please contact your sales representative.
Check the settings of Pr. 150 Output current detection level, Pr. 151
Output current detection signal delay time, Pr. 166 Output current
detection signal retention time, Pr. 167 Output current detection
operation selection.
Configure a circuit where frequent power ON/OFF is not
repeated.
If the situation does not improve after taking the above measure,
please contact your sales representative.
Give a frequency command by a current input or set Pr.267
Terminal 4 input selection, and set the voltage/current input switch
to voltage input.
 When not using the safety stop function, short across terminals
S1 and SC and across S2 and SC with shorting wire.
 When using the safety stop function, check that wiring of
terminal S1, S2 and SC 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-A211508-
000) for causes and countermeasures.
(Please contact your sales representative for the manual.)
List of fault displays
Corrective action Display
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