Trouble Shooting
35
Upon fault – motor stops, Fault LED lights and Fault Relay operates. The LCD shows TRIP: and fault description.
Upon Alarm – motor continues running, Alarm Relay operates and Fault LED flashes. The LCD shows ALARM: and
fault description
(for example: ALARM: MOTOR INSULATION).
INSULATION
ALARM
(Optional) Alarms when motor insulation level decreases below set level. Alarm ceases
automatically 60 sec. after resistance able set level. Check motor and cable insulation.
INSULATION TRIP
(Optional) Trips the starter when motor’s insulation level decreases below trip value.
Check motor and cable insulation level.
THERMISTOR TRIP
(Optional) Trips the starter when motor’s thermistor resistance decreases below trip value.
Check thermistor and cable’s resistance, check motor temperature near thermistor location.
TOO MANY
STARTS
Trips the starter if number of starts, during “Start Period” exceeds the preset number. Wait
until motor and starter cool down – according to “Start Inhibit” setting.
LONG START TIME
Trips the starter if output voltage does not reach nominal at the preset max. Start time.
Check FLA, FLC, and Max Start Time settings. Increase Initial Voltage, Current Limit &
Max. start time or decrease Acceleration Time as necessary.
O/C – SHEAR PIN
Trips the starter when:
1. Instantaneously when current exceeds 8.5 x Starter FLC.
2. During starting when current exceed 8.5 x Motor FLA.
3. During running when current exceeds 200-850%.
O/C Shear-Pin has a programmable delay of 0-5 seconds where the starter detects the fault
and does not trip before time delay has elapsed (delay is override when current reaches 8.5
x Starter FLC).
Check that motor is not installed or Jammed.
Check FLA, FLC settings.
Check motor and cable connections.
Perform a “Megger” test to verify motor and
cable’s condition
CAUTION
• Check that “Megger” maximum
voltage is no more than 500V!.
• Disconnect terminal 21 before
performing a “Megger” test.
OVERLOAD
Trips the starter when current exceed the Overload Trip level and thermal register has
filled up. Check FLA, FLC and Overload settings, check motor current, wait 15 minutes to
let motor and starter cool down before restarting.
UNDER CURRENT
Trips the starter when line current drops below the preset level for the preset time.
Check “Under Current Trip” and “Time Delay” settings, check line currents through L
1
,
L
2
, L
3
.
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