Maeda MC285C-2 - Page 202

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2.3.3 IF THE MOTOR DOES NOT RUN WHILE NO TRIP MESSAGE IS DISPLAYED…
If the motor does not run while no trip is displayed, follow these steps to track down the cause.
The motor does not run.
YES:
NO :
Is the 7-segment LED extinguished?
Check the power supply and the MCCB.
Is power being supplied normally?
Supply the power normally.
･The ST-CC circuit is opened. Close the circuit between CC and the terminal to which th
e
ST (standby) function on the control circuit terminal is assigned.
･Check the setting of
(always active function selection).
Make a service call.
Is displayed?
Is any failure message displayed?
(See 2.3.1)
Track down and eliminate the cause of the failure and then reset the inverter.
(See 2.3.2)
Are and a failure messag
e
displayed alternately?
Is the LED of the RUN/STOP ke
y
lighted?
Is the LED of the RUN/STOP key off?
displayed?
Determine the cause, using the parameter display function and the status monitoring function.
The inverter is in the process of retrying. The retry function can be disabled by normal o
r
emergency stop operation, or by turning off the inverter.
･When operation panel operation is selected … Press the RUN key to start the operation.
･Check whether the operation panel operation frequency is set properly.
･When another control mode is selected … Change the setting of the operation contro
l
mode selection .
･When operation panel operation is selected … Change the setting of the operation contro
l
mode selection parameter to 1.
･ You can check the setting of each input terminal on the monitor.
･When another control mode is selected … Check whether the external operation comman
d
is entered.
･Check to see that the frequency setting signal is set at zero.
･ Check the settings of the frequency setting signal parameters
, , .
･Check the frequency setting points 1 and 2 settings.
･Check that the start-up frequency is not higher than the operation frequency.
･ Check that the frequency setting (preset-speed operation frequency, etc.) is not set at zero.
･Check that the motor is not under a too large load or not locked up.
→Reduce the load if necessary.
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