Taco SKV SelfSensing

Taco® SKV
66 302-365, Effective: June 5, 2017
© 2017 Taco, Inc.
15-42 Voltage
15-43 Software Version
15-45 Actual Typecode String
15-49 SW ID Control Card
15-50 SW ID Power Card
15-60 Option Mounted
15-61 Option SW Version
WARNING/ALARM 16, Short Circuit
There is a short circuit in the motor or motor wiring.
Remove power to the adjustable frequency drive and
repair the short circuit.
WARNING/ALARM 17, Control Word Timeout
There is no communication to the adjustable frequency
drive.
The warning will only be active when 8-04 Control Time-
out Function is NOT set to [0] OFF.
If 8-04 Control Timeout Function is set to Stop and Trip, a
warning appears and the adjustable frequency drive
ramps down until it stops then displays an alarm.
Troubleshooting
• Check connections on the serial communication
cable.
• Increase 8-03 Control Timeout Time.
• Check the operation of the communication equip-
ment.
• Verify proper installation based on EMC require-
ments.
WARNING/ALARM 23, Internal Fan Fault
The fan warning function checks if the fan is running. The
fan warning can be disabled in 14-53 Fan Monitor.
Troubleshooting
• Check for proper fan operation.
• Cycle power to the adjustable frequency drive and
check that the fan operates briefly at startup.
• Check the sensors on the heatsink and control card.
WARNING/ALARM 24, External Fan Fault
The fan warning function checks if the fan is running. The
fan warning can be disabled in 14-53 Fan Monitor.
Troubleshooting
• Check for proper fan operation.
• Cycle power to the adjustable frequency drive and
check that the fan operates briefly at startup.
• Check the sensors on the heatsink and control card.
WARNING/ALARM 25, Brake Resistor Short Circuit
The brake resistor is monitored during operation. If a
short circuit occurs, the brake function is disabled and the
warning appears. The adjustable frequency drive is still
operational but without the brake function. Remove
power to the adjustable frequency drive and replace the
brake resistor (see 2-15 Brake Check).
WARNING/ALARM 26, Brake Resistor Power Limit
The power transmitted to the brake resistor is calculated
as a mean value over the last 120 seconds of run time.
The calculation is based on the intermediate circuit volt-
age and the brake resistance value set in 2-16 AC Brake
Max. Current. The warning is active when the dissipated
braking is higher than 90% of the brake resistance power.
If Trip [2] is selected in 2-13 Brake Power Monitoring, the
adjustable frequency drive will trip when the dissipated
braking energy reaches 100%.
WARNING/ALARM 27, Brake Chopper Fault
The brake transistor is monitored during operation and if
a short circuit occurs, the brake function is disabled and a
warning is issued. The adjustable frequency drive is still
operational but, since the brake transistor has shortcir-
cuited, substantial power is transmitted to the brake
resistor, even if it is inactive.
Remove power to the adjustable frequency drive and
remove the brake resistor.
WARNING/ALARM 28, Brake Check Failed
The brake resistor is not connected or not working.
Check 2-15 Brake Check.
WARNING/ALARM 29, Heatsink Temp
The maximum temperature of the heatsink has been
exceeded. The temperature fault will not reset until the
temperature falls below the reset heatsink temperature.
The trip and reset points are based on the adjustable fre-
quency drive power size.
Troubleshooting
Check for the following conditions.
• Ambient temperature too high.
• Motor cable too long.
• Incorrect airflow clearance above and below the
adjustable frequency drive.
• Blocked airflow around the adjustable frequency
drive.
• Damaged heatsink fan.
• Dirty heatsink.