Carrier PC211 Table 13 Cut l er-Hammer Solid-State Starter Troubleshooti ng G ui de (Continued)

Motor accelerates too
quickly. Current limit is too h igh. Decrease current li mit setting counter- clockwise.
Improper current feedb ack. Check current calibr ator for proper resis-
tance value.
Pulse start setting is too long. Decrease pulse start ti me counterclock-
wise.
Broken current feedba ck transformer wire. Check for a broken cur rent feedback
transformer wire.
Current limit adjustment
has no effect during
acceleration.
Improper current feedb ack. Check current cal ibrator for proper resi s-
tance value.
Starter or motor is noisy
or vibrates when start-
ing.
Single phasing due to open phase. Check wiring and over load heater coils.
Single phasing or unbal anced current due
to non-firing SCR. Check gate lead wiring to SCRs.
Defective motor. Check motor for shorts, opens, and
grounds.
Mechanical shock to
machine. Current increases too q uickly. Decr ease starting current coun terclock- wise. If necessary, increase ramp time
clockwise.
End of limit contact
does not close. Starter is in current limit. Perform SCR full voltage test.
Current trip contact
does not close when
current goes above the
trip setting.
Improper current feedb ack. Check current calibr ator for proper resis-
tance value.
Current trip contact
closes when current is
below trip setting.
Improper current feedb ack. Check current calibr ator for proper resis-
tance value.
Motor current, voltage ,
and speed oscillate. Power saver is misadjusted. Turn power saver adjustment CCW until oscillations cease.
Table 13 — Cut l er-Hammer Solid-State Starter Troubleshooti ng G ui de (Continued)
Problem Probabl e Caus e Area of Correction