Appendix 4 Troubleshooting
APPENDIX 402
7.4 Appendix 4 Troubleshooting
Troubles
Check points
The motor does not run
Main circuit
•Is the voltage between terminals R/L1-S/L2-T/L3 normal?
• Is the POWER light on?
•Is the wiring between the inverter and the motor correct?
Load
•Is the load too heavy?
•Is the motor rotor locked?
Parameter
settings
•Is the start-up 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 reverse rotation prevention (00-15(P.78)) limited?
•Is the signal bias and gain (02-12~02-15, 02-25~02-28/P.192~P.199) correct?
•Is the frequency jump (01-16~01-21/P.91~P.96) correct?
Control
circuit
•Is MRS function “on”? (relevant parameters 03-00(P.83)~03-05/P.80~P.84, P.86,
03-06(P.126), 03-09(P.550))
•Is RES function “on”? (relevant parameters 03-00(P.83)~03-05/P.80~P.84, P.86,
03-06(P.126), 03-09(P.550))
•Is the external thermal relay tripping?
•Is there an alarm (ALARM light is on) that has not been reset?
•Is the voltage/current signal correctly connected?
• Are STF and STR functions correct? (relevant parameters (relevant parameters
03-00(P.83)~03-05/P.80~P.84, P.86, 03-06(P.126), 03-09(P.550))
•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?
Содержание SA3 Series
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