Trane TR200 Operating Instructions Manual page 64

Troubleshooting
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Check that the supply voltage matches the
frequency converter voltage
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Perform input voltage test
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Perform soft charge circuit test
WARNING/ALARM 9, Inverter overload
The frequency converter is about to cut out because of an
overload (too high current for too long). The counter for
electronic, thermal inverter protection gives a warning at
98% and trips at 100%, while giving an alarm. The
frequency converter cannot be reset until the counter is
below 90%.
The fault is that the frequency converter is overloaded by
more than 100% for too long.
Troubleshooting
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Compare the output current shown on the LCP
with the frequency converter rated current
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Compare the output current shown on the LCP
with measured motor current
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Display the Thermal Drive Load on the LCP and
monitor the value. When running above the
frequency converter continuous current rating,
the counter should increase. When running below
the frequency converter continuous current
rating, the counter should decrease.
WARNING/ALARM 10, Motor overload temperature
According to the electronic thermal protection (ETR), the
motor is too hot. Select whether the frequency converter
gives a warning or an alarm when the counter reaches
100% in 1-90 Motor Thermal Protection. The fault occurs
when the motor is overloaded by more than 100% for too
long.
Troubleshooting
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Check for motor overheating
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Check if the motor is mechanically overloaded
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Check that the motor current set in 1-24 Motor
Current is correct
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Ensure that Motor data in parameters 1-20 to
1-25 are set correctly
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If an external fan is in use, check in 1-91 Motor
External Fan that it is selected
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Running AMA in 1-29 Automatic Motor Adaptation
(AMA) tunes the frequency converter to the
motor more accurately and reduces thermal
loading
WARNING/ALARM 11, Motor thermistor over temp
The thermistor might be disconnected. Select whether the
frequency converter gives a warning or an alarm in
1-90 Motor Thermal Protection.
BAS-SVX54B-EN
TR200 D-Frame Operating Instructions
Troubleshooting
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WARNING/ALARM 12, Torque limit
The torque has exceeded the value in 4-16 Torque Limit
Motor Mode or the value in 4-17 Torque Limit Generator
Mode. 14-25 Trip Delay at Torque Limit can change this from
a warning only condition to a warning followed by an
alarm.
Troubleshooting
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WARNING/ALARM 13, Over current
The inverter peak current limit (approximately 200% of the
rated current) is exceeded. The warning lasts about 1.5
secs., then the frequency converter trips and issues an
alarm. This fault may be caused by shock loading or fast
acceleration with high inertia loads. If extended mechanical
brake control is selected, trip can be reset externally.
Troubleshooting
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Check for motor overheating
Check if the motor is mechanically overloaded
Check that the thermistor is connected correctly
between either terminal 53 or 54 (analog voltage
input) and terminal 50 (+10 V supply) and that
the terminal switch for 53 or 54 is set for voltage.
Check 1-93 Thermistor Source selects terminal 53
or 54.
When using digital inputs 18 or 19, check that
the thermistor is connected correctly between
either terminal 18 or 19 (digital input PNP only)
and terminal 50
If a KTY sensor is used, check for correct
connection between terminals 54 and 55
If using a thermal switch or thermistor, check that
the programming if 1-93 Thermistor Resource
matches sensor wiring
If using a KTY sensor, check the programming of
1-95 KTY Sensor Type, 1-96 KTY Thermistor
Resource, and 1-97 KTY Threshold level match
sensor wiring
If the motor torque limit is exceeded during ramp
up, extend the ramp up time
If the generator torque limit is exceeded during
ramp down, extend the ramp down time
If torque limit occurs while running, possibly
increase the torque limit. Be sure the system can
operate safely at a higher torque.
Check the application for excessive current draw
on the motor
Remove power and check if the motor shaft can
be turned
Check that the motor size matches the frequency
converter
Check parameters 1-20 to 1-25 for correct motor
data
Warnings and Alarms
61