Troubleshooting; Parameters Fail Set; Motor Fails To Operate - Omron SYSDRIVE 3G3JVS ERIES User Manual

Maintenance Operations
7-2

Troubleshooting

Due to parameter setting errors, faulty wiring, and so on, the Inverter and motor may not
operate as expected when the system is started up. If that should occur, use this section
as a reference and apply the appropriate measures.
Refer to 7-1 Protective and Diagnostic Functions, if the contents of the fault are dis-
played,

7-2-1 Parameters Fail Set

H The display does not change when the Increment or Decrement Key is
pressed.
• Parameter write-prohibit is input.
This occurs when n01 for parameter write-prohibit selection/parameter initialization is set to 0. Set
n01 to an appropriate value according to the parameter to be set.
• The Inverter is operating.
There are some parameters that cannot be set during operation. Refer to the list of parameters.
Turn the Inverter off and then make the settings.
H The Digital Operator does not display anything.
Turn the Inverter off and on. If the Digital Operator still does not display anything, the internal circuit-
ry of the Inverter must have failed. Replace the Inverter.

7-2-2 Motor Fails to Operate

H The motor does not operate with input through the control circuit
terminals even though the frequency reference is correct.
• The operation method setting is incorrect.
If parameter n02 for operation mode selection is not set to 1 to enable the control circuit terminals,
the RUN command cannot be executed through the control circuit terminals.
Check and correct the setting in n02.
• Input in 2-wire sequence while 3-wire sequence is in effect and vice-versa.
The Inverter will operate in 3-wire sequence according to the RUN, stop, and forward/stop com-
mands if n37 for multi-function input 2 is set to 0. At that time, the Inverter will not operate if input in
2-wire sequence is ON. On the other hand, the Inverter in 2-wire sequence will only rotate in the
reverse direction if input in 3-wire sequence is ON.
Check and correct the setting in n37 or change the input method of the RUN command.
• The Inverter is not in RUN mode.
When the PRGM or LO/RE indicator (red indicator) of the Digital Operator is lit, the Inverter does not
start.
Cancel the RUN command, press the Mode Key to change the mode of the Inverter, and restart the
Inverter with the green indicator lit.
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Chapter 7