FR-F700 INSTRUCTION MANUAL (BASIC) - MRO Stop

Check first when you have troubles5.6.4 Motor rotates in opposite directionCheck that the phase sequence of output terminals U, V and W is correct.Check that the start signals (forward rotation, reverse rotation) are connected properly. (Refer to page 47)5.6.5 Speed greatly differs from the settingCheck that the frequency setting signal is correct. (Measure the input signal level.)Check that the Pr. 1, Pr. 2, Calibration parameter C2 to C7 settings are correctCheck that the input signal lines are not affected by external noise.(Use shielded cables)Check that the load is not too heavy.Check that the Pr. 31 to Pr. 36 (frequency jump) settings are correct.5.6.6 Acceleration/deceleration is not smoothCheck that the acceleration and deceleration time settings are not too short.Check that the load is not too heavy.Check that the torque boost (Pr. 0, Pr. 46) setting is not too large and the stall prevention function is notactivated.5.6.7 Motor current is largeCheck that the load is not too heavy.Check that the Pr. 0 Torque boost setting is correct.Check that the Pr. 3 Base frequency setting is correct.Check that the Pr. 14 Load pattern selection setting is appropriate.Check that the Pr. 19 Base frequency voltage setting is correct.5.6.8 Speed does not increaseCheck that the Pr. 1 Maximum frequency setting is correct. (If you want to run the motor at 120Hz or more,set Pr. 18 High speed maximum frequency. (Refer to Instruction Manual (applied) chapter 4.))Check that the load is not too heavy.(In agitators, etc., load may become heavier in winter.)Check that the torque boost (Pr. 0, Pr. 46) setting is not too large and the stall prevention function is notactivated.Check that the brake resistor is not connected to terminals P/+-P1 accidentally.5.6.9 Speed varies during operation1) Inspection of loadCheck that the load is not varying.2) Check the input signalsCheck that the frequency setting signal is not varying.Check that the frequency setting signal is not affected by noise.Check for a malfunction due to undesirable currents when the transistor output unit is connected.(Refer to page 23)3) OthersCheck that the wiring length is not too long for V/F control108