Troubleshooting Tips - Omron MX2 User Manual

Troubleshooting
6-1-4

Troubleshooting Tips

234
The table below lists typical symptoms and the corresponding solution(s).
1. Inverter does not power up.
Possible Cause(s)
Power cable is incorrectly wired.
Short bar or DCL between [P] and
[PD] is disconnected.
Power cable is broken.
2. Motor does not start.
Possible Cause(s)
Incorrect RUN command source
is selected.
Incorrect frequency source is
selected.
Frequency setting is 0 Hz.
RUN command is not set to input
terminal.
"Multi-speed input(s)
(02 to 05:CF1 to CF4)" is (are) set
to input terminal(s) and active.
Both FWD and REV input are
active.
Rotation direction restriction
(b035) is enabled.
Incorrect input wiring or short bar
position
Incorrect analog input or variable
resistor wiring
RUN command source is
operator, but input terminal is set
to "Force terminal" and active.
RUN command source is terminal,
but input terminal is set to "Force
operator" and active.
Inverter is in trip status.
(With ALARM LED and "Exxx"
indication)
Safety function is enabled
and either GS1 or GS2 input is
inactive.
Corrective Action
Check input wiring
Install short bar or DCL between [P] and [PD]
terminal.
Check input wiring.
Corrective Action
Check RUN command source (A002) for correct
source.
Ex. Terminal (digital input) : 01
Operator (RUN key) : 02
Check frequency source (A001) for correct
source.
Ex. Terminal (analog input) : 01
Operator (F001) : 02
If frequency source is terminal (A001=01),
check analog voltage or current signal at [O] or
[OI] terminals.
If frequency source is operator (A001=02), set
frequency in F001.
Depending on frequency source, input proper
frequency reference.
If frequency source is multi-speed operation, set
frequency in A020 to A035 and A220.
If RUN command source is terminal (A002=01),
set "forward" (00:FW) or "reverse" (01:RV) to any
input terminals. In case of 3-wire control, set "3-
wire start" (20:STA), "3-wire stop" (21:STP) and
"3-wire FW/RV" (22:F/R) to any input terminals.
Deactivate the input(s), or check the frequency
reference parameters associated (A021 to A035).
If RUN command source is FWD/REV input,
activate either FWD or REV input.
Check b035.
Wire inputs correctly and/or install short bar.
(ON/OFF status of inputs are monitored in d005.)
Wire correctly.
In case of analog voltage or variable resistor
input, check voltage between [O] and [L] termi-
nal. In case of analog current, check current
between current source and [OI] terminal.
Deactivate the input.
Deactivate the input.
Reset inverter by STOP/RESET key and check
error code.
If safety function is used, activate both GS1 and
GS2. If not, disable safety function by dip switch.
Section 6-1