38
Control Panel
Indication
Function Name Definition
(PUE)
PU disconnected
PU was disconnected when communication
parameter n17 = "1".
This function is valid for only the type with
RS-485 communication function.
(RET)
Retry count
Operation could not be resumed properly
within the preset number of retries.
(CPU)
CPU error
Arithmetic operation of the built-in CPU
does not end within the predetermined time.
*1. Resetting the inverter initializes the internal thermal integral data of the
electronic overcurrent protection.
*2. Activated only when "1" is set in Pr. 40 "start-time ground fault detection
selection".
*3. Activated only when any of Pr. 60 to Pr. 63 (input terminal function
selection) is set to OH.
(2) Minor failures
Control Panel
Indication
Function Name Definition
(FN)
Fan trouble
The cooling fan built in the inverter failed
(stopped).
Remarks
In this product, the cooling fan does not start until the start signal (
RUN
key,
STF, STR signal) turns on. (Refer to Pr. 76 "cooling fan operation selection".)
(3) Warnings
Control Panel
Indication
Function Name Definition
(OL)
Stall prevention
(overcurrent) (*4)
Current more than 150% of the rated
inverter current flew in the motor and
operation is being performed to prevent the
inverter from resulting in overcurrent shut-
off.
(oL)
Stall prevention
(overvoltage)
Regenerative energy of the motor became
excessive and operation is being
performed to stop the frequency from
decreasing to prevent overvoltage shut-off.
(PS)
PU stop (Stopped with PU
STOP key)
Pr. 75 "PU stop selection" had been set
and a stop was made by pressing the
STOP
RESET
key of the operation panel or parameter
unit (FR-PU04) during operation in the
external operation mode.
(UV)
Undervoltage
Power supply voltage of the inverter
dropped.
(Err)
During reset During inverter reset (RES signal is ON)
* 4. The stall prevention operation current may be set to any value. It is factory-
set to 150%.
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