Omron MX2 Series

10 Troubleshooting
10 - 15
Multi-function Compact Inverter 3G3MX2-EV2 User’s Manual (I666-E1)
Symptom
Possible cause
Remedy
Reference
page
The motor rotation
speed does not
increase.
There is a contact failure for the
analog voltage/current or vari-
able resistor input wiring.
Check the input wiring.
• For the analog voltage or variable resistor
input wiring, measure the voltage between
the terminals FC and L with a tester etc. to
check that the voltage is correct.
• For the analog current input wiring, with the
wires disconnected, measure the current
flowing between the power supply and OI
terminals with a tester etc. to check that the
current is correct.
P. 2-12
P. 7-22
The overload limit or overcur-
rent suppression function is
active.
Disable the function, or increase the level at
which the function is activated.
P. 7-78
P. 7-81
The 1st Maximum Frequency
(A004) or the 1st/2nd Fre-
quency Upper Limit
(A061/A261) is set too low.
Change the set value.
P. 5-20
P. 5-30
The set acceleration time is too
long.
Decrease the value set in the 1st/2nd Accel-
eration Time 1/2 (F002/F202/A092/A292).
P. 5-32
The Multi-function Input 1 to 7
Selection (C001 to C007) is set
to 06 (JG: Jogging) and that
terminal is ON.
Turn OFF the terminal to which the function is
allocated.
P. 5-51
The Multi-function Input 1 to 7
Selection (C001 to C007) are
set to 02 (CF1) to 05 (CF4) and
those terminals are ON to
enable the Multi-step speed
setting.
Disable the Multi-step speed setting. (When
this setting is enabled, multi-step speed oper-
ation is performed, so the motor runs accord-
ing to the frequency set in the Multi-step
Speed Reference 1 to 15 (A021 to A035).)
P. 5-49
The load is too heavy.
Reduce the load.
−
The motor brake is applied.
Release the brake.
−
The Output Fre-
quency Set-
ting/Monitor (F001)
cannot be set via
the Digital Operator.
The 1st Frequency Reference
Selection (A001) is set to other
than Digital Operator.
Set the 1st Frequency Reference Selection
(A001) to 02 (Digital Operator).
P. 5-23
The Multi-function Input 1 to 7
Selection (C001 to C007) is set
to 51 (F-TM: Forced termi- nal
block) and that terminal is
ON.
Turn OFF the terminal to which the function is
allocated.
P. 7-55
The specified
parameter does not
appear.
The Display Selection (b037) is
set to 01 (Individual display of
functions), 03 (Data compari-
son display), etc.
Set the Display Selection (b037) to 00 (Com-
plete display).
P. 5-3
The Multi-function Input 1 to 7
Selection (C001 to C007) is set
to 86 (DISP: Display fixed)
and that terminal is ON.
Turn OFF the terminal to which the function is
allocated.
P. 7-57
The Digital Opera-
tor keys do not
function.
The Multi-function Input 1 to 7
Selection (C001 to C007) is set
to 86 (DISP: Display fixed)
and that terminal is ON.
Turn OFF the terminal to which the function is
allocated.
P. 7-57
10
10-2 Troubleshooting