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6. Appendix
Eaton Electric General Inverters DF1 Series
UMXXXXXXXXE February 2020 www.eaton.com
6.3 Appendix 3 Troubles and solutions 0
Troubles
Check points
Motionless motor
Main circuit
• Check whether the power supply voltage between Terminals R/L1, S/L2 and T/L3 is nor-
mal.
• Check whether the Power light is on.
• Check whether the wiring between the inverter and the motor is correct.
Load
• Check whether the load is too heavy.
• Check whether the motor rotor is locked.
Parameters
Setting
• Check whether the starting frequency (01-11(P.13)) is set too big.
• Check whether the operation mode (00-16(P.79)) is correct.
• Check whether the maximum frequency (01-00(P.1)) is zero.
• Check whether the reverse rotation prevention (00-15(P.78))is restricted.
• Check whether the bias and gain (02-12~02-15, 02-25~02-28 / P.192~P.199) setting is
correct.
• Check that the frequency jump (01-16~01-21 / P.91~P.96) setting is correct.
Control
circuit
• Check whether the output stop signal “MRS” is ON. (Related parameter
03-00~03-05/P.80~P.84, P.86, 03-06(P.126) / 03-09(P.550))
• Check whether the “RES” function is ON. (Related parameter 03-00~03-05/P.80~P.84,
P.86, 03-06(P.126), 03-09 (P.550))
• Check whether the external thermal relay is operating or not.
• Check whether the reset has been performed or not after the set-off of the alarm (the
ALARM light in on).
• Check whether the voltage/current signals are correctly wired.
• Check whether the functions of STF and STR are correct. (Related parameter03-00~03-
05/P.80~P.84, P.86, 03-06(P.126), 03-09 (P.550))
• Check whether the wiring for the control circuit is disconnected or has a poor contact.
Reversed motor rotation
• Check whether the phase sequence of output terminals U/T1, V/T2 and W/T3 is correct.
• Check whether the start signal (STF and STR) are connected correctly.
Failure to increase the rotation
speed of the motor
• Check whether the load is too heavy.
• Check whether the stall prevention level (06-01(P.22)) is correct.
• Check whether the torque boost (01-10(P.0)) is set too high.
• Check whether the maximum frequency (01-00(P.1)) is effective.
Unsmoothed acceleration /
deceleration
• Check whether the acceleration / deceleration time (01-06(P.7), 01-07(P.8)) is correct.
• Check whether the acceleration / deceleration curve selection (01-05(P.29)) is correct.
• Check whether the voltage / current input signals are affected by noises.
Overlarge motor current
• Check whether the load is too heavy.
• Check whether the capacity of the inverter and of the motor are well matched.
• Check whether the torque boost (01-10(P.0)) is set too high.
Speed variation during the opera-
tion
• Check whether the voltage / current input signals are affected by noises.
• Check whether the load varies.
• Check whether the wiring length of the main circuit is too long.
