Protective Functions; Function Name - Mitsubishi Electric FR-F700 Manual

Protective Functions

When an alarm occurs in the inverter, the protective function is activated bringing the inverter to an alarm stop and the PU
display automatically changes to any of the following error (alarm) indications.

Function Name

Operation panel lock
Parameter write error
Copy operation error
Error
Stall Prevention
(overcurrent)
Stall prevention
(overvoltage)
Regenerative brake
prealarm
Electronic thermal relay
function prealarm
PU Stop
Maintenance signal output
Parameter copy
Fan fault
Overcurrent shut-off during
acceleration
Overcurrent shut-off during
constant speed
Overcurrent shut-off during
deceleration or stop
Regenerative overvoltage
shutoff during acceleration
Regenerative overvoltage
shut-off during constant
speed
Regenerative overvoltage shut-
off during deceleration or stop
Inverter overload shut-off
(electronic thermal relay
function)
*1
Motor overload shut-off
(electronic thermal relay
function)
*1
Fin overheat
Instantaneous power failure
protection
Undervoltage protection
Input phase failure
Stall prevention
Output side earth (ground)
fault overcurrent protection
Output phase failure
protection
External thermal relay
operation
*6
PTC thermistor operation
Option alarm
Option slot alarm
Option alarm
Parameter storage devide
alarm
47
Appears when operation is tried during operation panel lock.
Appears when an error occurs at parameter writing.
Appears when an error occurs at parameter copying.
Appears when the RES signal is on or the PU and inverter can not make normal
communication.
Appears during overcurrent stall prevention.
Appears during overvoltage stall prevention
Appears while the regeneration avoidance function is activated.
Appears if the regenerative brake duty reaches or exceeds 85% of the
regenerative brake duty" value. If the regenerative brake duty reaches 100%, a
regenerative overvoltage (E. OV_) occurs.
(displayed only for the 75K or more)
Appears when the electronic thermal O/L relay has reached 85% of the specified
value.
Appears when on the operation panel was pressed during external operation.
Appears when the cumulative energization time has exceeded the maintenance
output timer set value.
Appears when parameters are copied between models with capacities of 55K or
less and 75K or more.
Appears when the cooling fan remains stopped when operation is required or when the speed
has decreased.
Appears when an overcurrent occurred during acceleration.
Appears when an overcurrent occurred during constant speed operation.
Appears when an overcurrent occurred during deceleration and at a stop.
Appears when an overvoltage occurred during acceleration.
Appears when an overvoltage occurred during constant speed operation.
Appears when an overvoltage occurred during deceleration and at a stop.
Appears when the electronic thermal relay function for inverter element protection
was activated.
Appears when the electronic thermal relay function for motor protection was
activated.
Appears when the heatsink overheated.
Appears when an instantaneous power failure occurred at an input power supply.
Appears when the main circuit DC voltage became low.
Appears if one of the three phases on the inverter input side opened.
Appears when the output frequency drops to 0.5Hz as a result of deceleration due to
the excess motor load.
Appears when an earth (ground) fault occurred on the inverter's output side.
Appears if one of the three phases on the inverter output side opened.
Appears when the external thermal relay connected to the terminal OH operated.
Appears when the motor overheat status is detected for 10s or more by the external
PTC thermistor input connected to the terminal AU.
Appears when an alarm occurred in the option card or an AC power supply is
connected to the R/L1, S/L2, T/L3 when the high power factor converter connection
is set.
Appears when a communication error occurred in the communication option.
Appears when a functional error occurred in the plug-in option.
Appears when operation of the element where parameters are stored became
abnormal. (control circuit board)
Description Indication
to
to
"special
Pr. 70