Mitsubishi Electric FR-CS84-012 Instruction Manual page 221

Check Possible cause
point
A start signal is not input.
Both the forward and reverse rotation
start signals (STF, STR) are input
simultaneously.
Frequency command is zero. (The [RUN]
LED indicator on the operation panel is
blinking.)
The Terminal 4 input selection (AU)
signal is not ON when terminal 4 is used
for frequency setting. (The [RUN] LED
indicator on the operation panel is
blinking.)
Input
The Output stop (MRS) signal or the
signal Inverter reset (RES) signal is ON.
(The [RUN] LED indicator on the
operation panel is blinking.)
The jumper connector for selecting sink
logic or source logic is incorrectly
installed. (The [RUN] LED indicator on
the operation panel is blinking.)
The voltage/current input switch is not
correctly set for the analog input signal (0
to 5 V, 0 to 10 V, or 4 to 20 mA). (The
[RUN] LED indicator on the operation
panel is blinking.)
The
(The operation panel indication is
" " (PS).)
220
6. PROTECTIVE FUNCTIONS
6.6 Check first when you have a trouble
key was pressed.
Countermeasure
Check the start command source, and input a start signal.
PU operation mode:
External operation mode: STF/STR signal
Turn ON only one of the forward and reverse rotation start signals
(STF or STR).
When the STF and STR signals are turned ON simultaneously in the
initial setting, a stop command is given.
Check the frequency command source and input a frequency
command.
Turn ON the AU signal.
Turning ON the AU signal activates terminal 4 input.
Turn the MRS or RES signal OFF.
The inverter starts the operation with a given start command and a
frequency command after turning OFF the MRS or RES signal.
Before turning OFF, ensure the safety.
Check that the control logic switchover jumper connector is correctly
installed.
If it is not installed correctly, the input signal is not recognized.
Set Pr.267 Terminal 4 input selection, and a voltage/current input
switch correctly, then input an analog signal in accordance with the
setting.
During the External operation mode, check the method of restarting
from a input stop from PU.
Refer to
page
103
35
103
131
35
36
131
87, 213