Danfoss VLT FC 103 Operating Manual page 71

Maintenance, Diagnostics, a...
ALARM 16, Short circuit
There is short-circuiting in the motor or motor wiring.
Troubleshooting
•
Remove the power to the drive and repair the
short circuit.
WARNING
HIGH VOLTAGE
Drives contain high voltage when connected to AC mains
input, DC supply, or load sharing. Failure to use qualified
personnel to install, start up, and maintain the drive can
result in death or serious injury.
•
Disconnect power before proceeding.
WARNING/ALARM 17, Control word timeout
There is no communication to the drive.
The warning is only active when parameter 8-04 Control
Word Timeout Function is NOT set to [0] Off.
If parameter 8-04 Control Word Timeout Function is set to [5]
Stop and trip, a warning appears, and the drive ramps
down to a stop and shows an alarm.
Troubleshooting
•
Check the connections on the serial communi-
cation cable.
•
Increase parameter 8-03 Control Word Timeout
Time.
•
Check the operation of the communication
equipment.
•
Verify that proper EMC installation was
performed.
WARNING/ALARM 20, Temp. input error
The temperature sensor is not connected.
WARNING/ALARM 21, Parameter error
The parameter is out of range. The parameter number is
shown in the display.
Troubleshooting
•
Set the affected parameter to a valid value.
WARNING 22, Hoist mechanical brake
0 = The torque reference was not reached before timeout.
1 = There was no brake feedback before the timeout.
WARNING 23, Internal fan fault
The fan warning function is a protective function that
checks if the fan is running/mounted. The fan warning can
be disabled in parameter 14-53 Fan Monitor ([0] Disabled).
There is a feedback sensor mounted in the fan. If the fan is
commanded to run and there is no feedback from the
sensor, this alarm appears. This alarm also shows if there is
a communication error between the fan power card and
the control card.
MG16P222
Operating Guide
Check the alarm log (see chapter 3.6 Local Control Panel
(LCP)) for the report value associated with this warning.
If the report value is 2, there is a hardware problem with 1
of the fans. If the report value is 12, there is a communi-
cation problem between the fan power card and the
control card.
Fan troubleshooting
•
•
Fan power card troubleshooting
•
•
•
WARNING 24, External fan fault
The fan warning function is a protective function that
checks if the fan is running/mounted. The fan warning can
be disabled in parameter 14-53 Fan Monitor ([0] Disabled).
There is a feedback sensor mounted in the fan. If the fan is
commanded to run and there is no feedback from the
sensor, this alarm appears. This alarm also shows if there is
a communication error between the power card and the
control card.
Check the alarm log (see chapter 3.6 Local Control Panel
(LCP)) for the report value associated with this warning.
If the report value is 1, there is a hardware problem with 1
of the fans. If the report value is 11, there is a communi-
cation problem between the power card and the control
card.
Fan troubleshooting
•
•
Power card troubleshooting
•
•
•
WARNING 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 drive is still operational, but without
the brake function.
Danfoss A/S © 04/2018 All rights reserved.
Cycle power to the drive and check that the fan
operates briefly at start-up.
Check for proper fan operation. Use parameter
group 43-** Unit Readouts to show the speed of
each fan.
Check the wiring between the fan power card
and the control card.
Fan power card may need to be replaced.
Control card may need to be replaced.
Cycle power to the drive and check that the fan
operates briefly at start-up.
Check for proper fan operation. Use parameter
group 43-** Unit Readouts to show the speed of
each fan.
Check the wiring between the power card and
the control card.
Power card may need to be replaced.
Control card may need to be replaced.
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