Mitsubishi Electronics FR-V500 instruction manual F control

Troubleshooting

(2) V/F control

The motor does not rotate.

N

Are the charge lamp on and the operation panel LED indication given?

Y

		Y
Is there no alarm output
to the operation panel?
	N	Check the alarm definition,
		remove the cause of the
	Is the secondary side	alarm, and reset the inverter.
		N
	wiring (U, V, W) of the
	inverter correct without

Are the operation panel	Y
LED off and the charge
lamp on?

1) Contact fault of the operation panel N 2) Control power is not supplied.

(Check whether jumpers are connected across R-R1 and S-S1.)

open cables?				Perform wiring correctly.
			Y
				N
		Control
		Pr.800
			Y	Set Pr.800.
				N
	Is the start command
	input?
			Y	PU: Press FWD (REV).
				External: Turn on STF (STR).
				Also check that both
				STF and STR are not on.

Are the operation panel LED on and the charge lamp off?

N

Are the earth leakage breaker and magnetic contactor on?

Y

Are the voltages of the main circuit power supply voltage terminals

Y

1)The jumper across P-P1 or DC reactor is disconnected.

2)Connect a jumper or DC reactor.

N

Turn on the earth leakage breaker

and magnetic contactor.

N

Are the MRS and RES signals both off?

Y

Is the maximum setting (Pr. 1) other than 0?

Y

Is reverse rotation prevention (Pr. 78) set to enable rotation in the rotation direction?

Y

When the electromagnetic brake is used, is the

electromagnetic brake open?

N

Turn off the MRS and RES signals.

N

Make the maximum setting correctly.

N

Set reverse rotation prevention (Pr. 78) correctly.

N

(R, S, T) normal?

Y

Please contact your sales representative.

Check for a low voltage, phase failure, poor connection or the like and take corrective action.

N

Y

Open the brake.

Is the speed command input?

Y

Is an external command used for the speed command?

Y

Is an analog input used?

N

Set the speed from the PU.

N

Apply a voltage to the analog input terminals (across 2-5). Also, to calibrate the No. 2 terminal, adjust the bias and gain of the analog voltage using Pr. 902 and Pr. 903.

Turn on the multiple speed (*RH, RM, RL, REX).

*The terminal functions vary with input terminal assignment (Pr. 180 to Pr. 183, Pr. 187).

Is operation performed without using communication?

Y

Is the load light?

Y

N

Is any cable open?

Are the station number and so on set correctly?

N

Is the torque boost setting low?

N

Wire the cables correctly. Make communication setting.

Y

Please contact your sales representative.

N

The load is excessive, resulting in a motor lock status. Lighten the load or increase

the motor and inverter capacities.

Increase the torque boost. (Do not increase it too high. Doing so may cause the motor to overheat. Increase it to about 10%.)

85