Toshiba VF-nC1 - Manual (Page 135)

E6581090
M-7
13
13.3 If the motor does not run while no trip message is displayed ...
If the motor does not run while no trip message is displayed, follow these steps to track down the
cause.
YES :
NO :
The motor does not run.
Is the 7-segment LED
extinguished? Check the power supply and the MCCB.
Is power being supplied normally? Supply the
power normally.
Make a service call.
Is QHH displayed? • The ST-CC circuit is opened. Close the circuit between CC and the
terminal to which the ST (standby) function on the control circuit
terminal is assigned. (See 6.2.)
Is any failure message
displayed? (See 13.1.) Track down and eliminate the cause of the failure and then reset the
inverter. See 13.2.
Are TVT[ and a failure
message displayed
alternately?
The inverter is in the process of retrying. The retry function can be
disabled by normal or emergency stop operation, or by turning off the
inverter.
Is : . displayed?
Is the RUN lamp
blinking?
• Check to see that the frequency setting signal is not set at zero.
• Check the settings of the frequency setting signal parameters HOQF.
(See 5.1.)
• Check the frequency setting signal points 1 and 2 settings. (See 6.4.)
• Check that the start-up frequency is not higher than the operation
frequency. (See 6.5.)
• 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.
Determine the cause, using the parameter display function and the status monitoring function.
Refer to Section 11 for the parameter display function or Section 8 for the status motoring function.
The inverter is receiving an operation signal. Check whether it has
received an operation command. (Check to see that the frequency setting
signal level is not zero.)