Shihlin electric SC3 Series User Manual

Appendix 4:Troubles and solutions
Appendix 202
7.4 Appendix 4:Troubles and solutions
Troubles
Check points
The motor does not run
Main circuit
•Is the voltage between terminals R/L1-S/L2-T/L3 normal?
•Is the wiring between the inverter and the motor correct?
Load
•Is the load too heavy?
•Is the motor rotor locked?
Parameters
Setting
•Is the startup frequency (01-11(P.13)) set too high?
•Is the operation mode (00-16(P.79)) correct?
•Is the upper limit frequency (01-00(P.1)) set to zero?
•Is forward reverse rotation prevention (00-15(P.78)) limited?
•Is the signal input and percentage setting（02-25（P.198）~02-28（P.197））
correct?
•Is the frequency jump（01-16(P.91)~01-21(P.96)）correct?
Control
circuit
•Is MRS function “on”? (relevant parameters 03-00(P.83), 03-01(P.84),
03-03(P.80) , 03-04(P.81)）
•Is RES function “on”? (relevant parameters 03-00(P.83) 、 03-01(P.84) 、
03-03(P.80)、03-04(P.81)）
•Is the external thermal relay tripping?
•Is there an alarm that has not been reset?
•Is the voltage/current signal properly connected?
• Are STF and STR functions correct? (relevant parameters 03-00(P.83),
03-01(P.84), 03-03(P.80), 03-04(P.81)）
•Does the wiring of the control circuit fall off or have poor contact?
Opposite motor rotation
direction
•Is the phase sequence of the wiring of the motor terminal (U/T1)/(V/T2)/(W/T3) correct?
•Is the wiring of the start terminals STF and STR correct?
The motor cannot
accelerate
•Is the load too heavy?
•Is stall prevention level (06-01(P.22)) correct?
•Is torque compensation (01-10(P.0)) too high?
•Is it limited by the upper limit frequency (01-00(P.1))?
Unsmooth acceleration
and deceleration
•Is the acceleration and deceleration time (01-06(P.7) and 01-07(P.8)) set correctly?
•Is the acceleration/deceleration curve selection (01-05(P.29)) correct?
•Does the voltage/current signal fluctuate due to noise?
Excessive motor
current
•Is the load too heavy?
•Does the inverter capacity match the motor capacity?
•Is torque compensation (01-10(P.0)) too high?
Speed fluctuation in
operation
•Does the voltage/current signal fluctuate due to noise?
•Has the motor load changed?
•Is the main circuit wiring too long?

Shihlin electric SC3 Series Specifications

General

Brand	Shihlin electric
Model	SC3 Series
Category	Inverter
Language	English