Smach EFE 4000, Service Manual

Page: 14 / 31

14
Status
General troubleshooting
Checking point Remedy
• Is a na l og frequency i nput s i gna l wi ri ng
correct?
• Is vol ta ge of frequency i nput correct?
Is opera ti on mode s etti ng correct?
• Opera te ope ra ti ons through the di gi ta l
pa ne l .
Motor runs
i nvers el y
Are wi ri ng for output termi na l s T1, T2, a nd T3
corre ct?
• Wi ri ng mus t ma tch U, V, a nd W termi na l s of the
motor.
Are wi ri ng for forwa rd a nd revers e s i gna l s
correct?
• Check wi ri ng a re correct i f neces s a ry.
Motor ca n not
run
Is power a ppl i ed to L1(L), L2, a nd L3(N)
termi na l s (i s the cha rgi ng i ndi ca tor l i t)?
• Is the power a ppl i ed?
• Turn the power OFF a nd then ON
a ga i n.
• Ma ke s ure the power vol ta ge i s correct.
• Ma ke s ure s crews a re s ecured fi rml y.
Are there vol ta ge a cros s the output termi na l
T1, T2, a nd T3?
• Turn the power OFF a nd then ON a ga i n.
Is ove rl oa d ca us i ng the motor bl ocke d?
• Reduce the l oa d to l et the motor
runni ng.
Are there a ny a bnorma l i ti es i n the i nve rter? • See error des cri pti ons to check wi ri ng
a nd corre ct i f ne ces s a ry. Is forwa rd or revers e runni ng comma nd i s s ued?
Motor s peed
va ri es
unus ua l l y
Is the l oa d too hea vy? • Reduce the l oa d.
Does the l oa d va ry l a rgel y?
• Mi ni mi ze the va ri a ti on of the l oa d.
• Increa s e ca pa ci ti es of the i nve rter a nd
the motor.
Is the i nput power l a ck of pha s e?
• Add a n AC rea ctor a t the power i nput
s i de i f us i ng s i ngl e-pha s e powe r.
• Check wi ri ng i f us i ng three-pha s e
power.
Motor
runni ng
s pee d too
hi gh or too
l ow
Are s peci fi ca ti ons of the motor (pol es ,
vol ta ge…) correct?
• Confi rm the motor’s s peci fi ca ti ons .
Is the ge a r ra ti o correct? • Confi rm the gea r ra ti o.
Is the s etti ng of the hi ghes t output frequency
correct?
• Confi rm the hi ghes t output fre quency.
The motor
s pee d ca n
not be
regul a te d.
Are wi ri ng for a na l og frequency i nputs correct? • Check wi ri ng a re correct i f neces s a ry.
Is the s etti ng of opera ti on mode correct?
• Che ck the ope ra ti on mode of the
opera tor.
Is the l oa d too hea vy? • Reduce the l oa d.
Ha s a na l og frequency s i gna l been i nput?
*General Troubleshooting of Inverter