LEESON FHP Series NEMA 4x Variable Speed Drive - Manual (Page 39)

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When JMP503 is set to the RESTART position as shown in
Figure 15 below (factory set to UV trip), the drive will stop
when an under voltage condition, (bus voltage drops below
200 VDC), occurs. This can occur due to line sag, line
transients, or line disconnect. A timer, (1.5 seconds), is
started which allows an automatic restart if the bus voltage
has returned to proper operation potential. Refer to Figure
4 (page 4) for Jumper Locations.
JMP503
JMP503 (on bottom board)
Pins 1 & 2 to Trip
Pins 2 & 3 to Restart
UV TRIP: Drive has a low voltage fault & must
be manually re-enabled or the bus voltage must
go to zero and then return to operation potential
to restart.
RESTART: Drive has a low voltage fault &
will momentarily stop then auto-restart
when input voltage returns to minimum level.
UV TRIP
RESTART
1
2
3
Figure 15. Jumper Settings--JMP503