GE ASTAT XT QT 0008U Series, User Manual

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59
• Trouble Shooting
7.
TROUBLE SHOOTING
Upon fault – motor stops, the Fault LED lights and Fault Relay chances position. The LCD shows TRIP: < fault
description>. (for example:
Trip: Undercurrent
).
Storage Error
Storage Error displays in case of a failure in parameter storing.
Wait 3 seconds and try to store again.
If does not help, load the default parameters of the ASTAT-XT and re-program all
parameters.
To obtain default parameters refer to section
4.5.3 page 22.
Access Locked
Avoids parameter changing when dip switch # 8 –Software Lock is set to ON.
If parameter changing is required verify that dip switch #8 is set to OFF.
For Dip switch #8 setting refer to section
5.5.6 page 50.
Thermistor Trip
Trips the ASTAT-XT when the motor thermistor resistance decreases below trip level
set.
Check resistance of the thermistor and cables; Check motor temperature near
thermistor location.
For
Thermistor Trip
protection setting refer to section 4.7.7 page 38.
Too Many Starts
Trips the ASTAT-XT if the
number of starts
, during
Duty Cycle Time
exceeds the preset number.
Wait until motor and ASTAT-XT cool down – according to
Number Of Starts
,
Duty Cycle Time
and
Start Lockout settings
. Refer to section 4.7.3
page 32.
Long Start Time
Trips the ASTAT-XT if output voltage does not reach nominal at the preset
Max.
Start time.
Check
Starter Current
and
Max. Start Time
settings. Increase
Starting
Voltage, Current Limit
&
Max. Start Time
or decrease
Ramp UP
Time
as necessary.
For
start Settings Parameters
refer to section 4.7.3 page 32.
O/C JAM Fault
Trips the ASTAT-XT when:
•
Instantaneously when current exceeds 8.5 x ASTAT-XT Current
• During starting when current exceeds 8.5 x Motor Current
• During running when current exceeds 200-850% of Motor Current.
O/C JAM Fault
has a programmable delay of 0-5 seconds where the ASTAT-XT
detects the fault and does not trip before time delay has elapsed (delay is overriden
when current reaches 8.5 x ASTAT-XT Current).
Check that motor is not stalled or jammed.
Check
Motor Current and Starter Current
settings.
Check motor and cable connections.
Perform a “Megger” test to verify motor and cable’s condition.
For protection parameters settings refer to section
4.7.2 page 27.
CAUTION
Check that “Megger” maximum voltage is no more than 500V!
Disconnect terminal 21 before performing a “Megger” test.
Overload
Trips the ASTAT-XT when current exceeds the Overload Trip level and the thermal
register has filled up.
Check
Motor Current
,
Starter Current
settings and overload settings and
check motor current, then wait at least 15 minutes to let the motor and ASTAT-XT
cool down before restarting.
For protection parameters settings refer to section
4.7.2 page 27.