Carrier SmartVu control User Manual

SRDC-UG-2-14-000
REVISION
DATE
PAGE
19 Series Carrier®
SmartVu
TM
–
Controls IOM
2.3
Dec 4, 2020
112 OF 168
112
CURRENT IMBALANCE TIME. Check
settings in ISM_CONF screen. Check
ISM_HIST screen. Check current
transformer wiring leading to ISM terminal
block J4. Verify phase to phase and
phase to ground line voltage. Check wiring
and hardware between building power
supply and motor. Current imbalance may
improve if power or motor leads are
rotated in the same phase sequence.
Alm-405
ALM-405 ISM Fault -
Line Voltage Imbalance
As above
As above
Voltage Imbalance > VOLTAGE %
IMBALANCE for greater than the
VOLTAGE IMBALANCE TIME. Check
settings in ISM_CONF screen. Check
ISM_HIST screen. Check line voltage
wiring leading to ISM terminal block J3.
Verify phase to phase and phase to
ground line voltage. Check wiring and
hardware between building power supply
and motor.
Alm-406
ALM-406 ISM Fault -
Overload Trip
As above
As above
Any phase current > 108% RLA for
excessive time period. Alarm can result
from significant load side current
imbalance when running at full load.
Check ISM_HIST screen. Check for
consistent entering condenser water
temperature and water flow rates. Check
MOTOR RATED LOAD AMPS and
STARTER LRA RATING in ISM_CONF
screen. VFD applications only: Any phase
current > 120% for excessive time period.
Alm-407
ALM-407 ISM Fault -
Motor Locked Rotor
Trip
As above
As above
Any LINE CURRENT > MOTOR LOCKED
ROTOR TRIP for excessive time while
running after the LOCKED ROTOR
START DELAY has expired. Check
MOTOR LOCKED ROTOR TRIP and
MOTOR CURRENT CT RATIO in
ISM_CONF screen. Check motor
nameplate data. Check ISM_HIST screen.
Check motor wiring and motor winding
resistance. Temporarily enable SINGLE
CYCLE DROP OUT to capture power
disturbances.
Alm-408
ALM-408 ISM Fault -
Starter Lock Rotor Trip
As above
As above
Any LINE CURRENT > MOTOR LOCKED
ROTOR TRIP for excessive time while
running after the LOCKED ROTOR
START DELAY has expired. Check
MOTOR LOCKED ROTOR TRIP and
MOTOR CURRENT CT RATIO in
ISM_CONF screen. Check motor
nameplate data. Check ISM_HIST screen.
Check motor wiring and motor winding
resistance. Temporarily enable SINGLE
CYCLE DROP OUT to capture power
disturbances.
Alm-409
ALM-409 ISM Fault -
Ground Fault
As above
As above
Any GROUND FAULT current > GROUND
FAULT CURRENT threshold for a duration
> GROUND FAULT PERSISTENCE after
the GROUND FAULT START DELAY has
expired. Check these settings and
GROUND FAULT CT RATIO in
ISM_CONF screen. Check ISM_HIST
screen. Confirm that ground fault current
transformer orientation is correct and that

Carrier SmartVu control Specifications

General

Brand	Carrier
Model	SmartVu control
Category	Control Panel
Language	English