37/06
TROUBLESHOOTING
SYMPTOM SOLUTION
The RUN light does not blink
on initial power-up and all
three fault lights are on.
Check the RESTART DELAY knob. If it is set to the manual (MAN)
position, the Model 455 is in manual reset mode. Turn the
RESTART DELAY to “2” for several seconds until the output
contacts close.
No LEDs are lit—the unit
seems completely dead.
Measure the three line-to-line voltages. If any of the voltages are
below 150VAC, the Model 455 does not have enough power to
operate its internal electronics. This may occur on a single-phased
system. If the voltages are correct, call SymCom at (800) 843-8848.
PHASING FAULT light is
blinking on initial power-up.
Turn off the 3-phase power. Swap any two leads powering the
Model 455: L1, L2, or L3. There is a 50:50 chance of correctly
connecting leads the first time. Re-apply 3-phase power.
PHASING FAULT light is
blinking after the motor has
previously been running.
The incoming lines have been reverse-phased. Swap and two
incoming power lines to the magnetic contactor.
The PHASING FAULT light
is on and the unit will not
reset even though the
RESTART DELAY is not in
the manual (MAN) position.
Measure incoming lines for correct voltage. If the voltages do not
exceed the NEMA unbalance setting, a single-phasing condition
has occurred on the load side of the contactor. Check the contacts
on the magnetic contactor. If the contacts appear in good condition,
check the wiring to M1, M2 and M3. Power must be removed and
re-applied to clear this fault condition. If the contacts and wiring are
good, call SymCom at (800) 843-8848.
The UNDERVOLT. or
OVERVOLT light is on
Measure the three line-to-line voltages and calculate the average.
If the average is outside ±7% of the nominal voltage as set by
VOLT. ADJ., the MotorSaver®is functioning properly. If the voltage
is within the reset window, call SymCom at (800) 843-8848.
The RUN LIGHT blinks, the
motor starts momentarily but
quickly turns off with the
PHASING FAULT light on.
Check the contactor to ensure the contacts and motor wiring are in
good condition. Power must be removed and re-applied to clear this
fault condition.
If the problem persists, call SymCom at (800) 843-8848.
INDICATOR LIGHTS
LED INDICATOR CONDITION
UNDERVOLTAGE ON Voltage is less than 93% of nominal voltage as set by
the VOLT. ADJ. knob
OVERVOLTAGE ON Voltage is greater than 107% of nominal voltage as
set by VOLT. ADJ.
PHASING FAULT ON
Voltage unbalance is greater than the setting of
UNBALANCE TRIP or a single-phasing fault has
occurred. If single-phasing has occurred on the load
side of the contactor, power must be removed and re-
applied to the MotorSaver®.
PHASING FAULT BLINKING Incoming power is reverse-phased.
UNDERVOLTAGE, OVERVOLTAGE AND
PHASING FAULT LIGHTS ON Unit has been powered up in the manual restart
position.
RUN LIGHT ON Output contact is energized.
RUN LIGHT BLINKING The MotorSaver®is timing through the restart delay.
