Taco SKV SelfSensing

Taco® SKV
65 302-365, Effective: June 5, 2017
© 2017 Taco, Inc.
Display the Thermal Drive Load on the LCP and monitor
the value. When running above the adjustable frequency
drive continuous current rating, the counter should
increase. When running below the adjustable frequency
drive continuous current rating, the counter should
decrease.
See the derating section in the Design Guide for more
details if a high switching frequency is required.
WARNING/ALARM 10, Motor Overload Temperature
According to the electronic thermal protection (ETR), the
motor is too hot. Select whether the adjustable frequency
drive 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
• Check for motor overheating.
• Check if the motor is mechanically overloaded.
• Check that the motor current set in 1-24 Motor Cur-
rent is correct.
• Ensure that Motor data in parameters 1-20 through
1-25 are set correctly.
• If an external fan is in use, check in 1-91 Motor Exter-
nal Fan that it is selected.
• Running AMA in 1-29 Automatic Motor Adaptation
(AMA) may tune the adjustable frequency drive to the
motor more accurately and reduce thermal loading.
WARNING/ALARM 11, Thermistor overload
The thermistor might be disconnected. Select whether
the adjustable frequency drive gives a warning or an
alarm in 1-90 Motor Thermal Protection.
Troubleshooting
• Check for motor overheating.
• Check if the motor is mechanically overloaded.
• When using terminal 53 or 54, check that the therm-
istor 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 ter-
minal 18 or 19 (digital input PNP only) and terminal
50. Check 1-93 Thermistor Source selects terminal
18 or 19.
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
• 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.
WARNING/ALARM 13, Overcurrent
The inverter peak current limit (approx. 200% of the rated
current) is exceeded. The warning lasts about 1.5 sec.
Then the adjustable frequency drive trips and issues an
alarm. This fault may be caused by shock loading or fast
acceleration with high inertia loads. If extended mechan
ical brake control is selected, trip can be reset externally.
Troubleshooting
• Remove power and check if the motor shaft can be
turned.
• Make sure that the motor size matches the adjust-
able frequency drive.
• Check parameters 1-20 through 1-25 for correct
motor data.
WARNING/ALARM 14, Ground Fault
There is current from the output phases to ground, either
in the cable between the adjustable frequency drive and
the motor or in the motor itself.
Troubleshooting
• Remove power to the adjustable frequency drive and
repair the ground fault.
• Check for ground faults in the motor by measuring
the resistance to ground of the motor leads and the
motor with a megohmmeter.
WARNING/ALARM 15, Hardware Mismatch
A fitted option is not operational with the present control
board hardware or software.
Record the value of the following parameters and contact
your Danfoss supplier:
15-40 FC Type
15-41 Power Section