Symptom Possible cause Remedy
Refer-
ence
page
The motor rota-
tion speed does
not increase.
Multi-step speed settings “0: CF1”
to “3: CF4” are set to the multi-
function input terminal, and these
are ON.
Disable the multi-step speed setting. (When
this setting is enabled, multi-step speed opera-
tion is performed, so the motor runs according
to the frequency set in the Multi-step Frequen-
cy Reference 1 to 15 (C05 to C19).)
page
5-58
The load is too heavy. Reduce the load. -
The motor brake is applied.
Release the brake. -
The frequency
cannot be set at
1st Frequency
Reference/1st
Multi-step Fre-
quency Refer-
ence 0
(C99)/2nd Fre-
quency Refer-
ence/2nd Multi-
step Frequency
Reference 0
(E109) on the
Digital Opera-
tor
.
The 1st Frequency Reference Se-
lection (F01) is set to other than
digital operator.
Set the 1st Frequency Reference Selection
(F01) to “0: (Digital Operator).”
page
5-27
The multifunction input terminal is
set to “162: F-TM (Forced terminal
block)” and that terminal is ON.
Turn OFF the terminal to which the function is
allocated.
page
7-
75
The specified
parameter does
not appear
.
The Operator Display Selection
(E52) is set to “1: Parameter data
check mode.”
Set Operator Display Selection (E52) to “2:
Full menu mode.”
page
5-
3
The parameter
settings cannot
be changed.
The inverter is in operation. Stop the inverter
. Then, set the parameters
again after the motor stops with deceleration.
-
Soft lock is enabled. Disable the Operator Protection Function Se-
lection (F00).
page
7-74
The motor ro-
tates in reverse.
The phase sequence of wiring to
the motor is incorrect. (The motor
is not designed to rotate forward
in the phase sequence: U/T1,
V/T2, W/T3.)
Reverse the order of two wires connected to
U/T1, V/T2, W/T3, or change the phase se-
quence to match that of the motor.
page
2-1
1
The 3-wire input function is ena-
bled, but the forward/reverse logic
is incorrect.
Check the logic of the “97: F/R (3-wire forward/
reverse)” allocated to a multifunction input ter-
minal.
page
5-56
The motor ro-
tates in reverse
when the RUN
key is pressed.
The operation direction based on
the FW and RV terminals is incor-
rect.
Input the FW and RV terminals correctly
.
page
5-25
9 Troubleshooting
9-31
M1 Series Standard Type User's Manual (I669)
9-2 Troubleshooting
9
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