Instruction manual

2–28 MM300 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL
STARTER TYPES CHAPTER 2: INSTALLATION
Forced starts (for example, External Start) operate in the same fashion as other starts, with
relay1 not picking up until the pre-contactor timer times out. Then, after 1 second, relay 2
picks up. If up-to-speed feedback is not received from auxiliary relay MR within the
Ramp
Up Time
setting during a start, a Drive Start Failed alarm is generated. If up-to-speed
feedback is not seen before a stop control, an Inverter Fail alarm is generated, and relay2
opens as described above. If inverter speed feedback remains when the ramp down time
expires during a stop, a Drive Stop Fail alarm is generated. Neither results in a trip or a stop.
The Drive Start Failed alarm is latched till reset or cleared by a stop control. The Inverter
Fail alarm is cleared at next start.
The Undervoltage Autorestart feature is disabled for the Inverter Starter.
NOTE
NOTE:
Connect AUX VT to the Control Supply for correct operation of the UV Restart feature and
readings of inputs.
NOTE
NOTE:
Ensure inverter is located before contactor.