OPERATION INSTRUCTIONS DANFOSS ENG

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. Make sure that 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 (approximately 200% of the
rated current) is exceeded. The warning lasts about 1.5 s,
then the adjustable frequency drive trips and issues an
alarm. Shock loading or quick acceleration with high inertia
loads can cause this fault. If the acceleration during ramp
up is quick, the fault can also appear after kinetic backup.
If extended mechanical 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
adjustable frequency drive.
•
Check parameters 1-20 to 1-25 for correct motor
data.
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.
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
Danfoss:
•
15-40 FC Type
•
15-41 Power Section
•
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 (for each option slot)
ALARM 16, Short-circuit
There is short-circuiting in the motor or motor wiring.
Troubleshooting
•
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 is only active when 8-04 Control Word Timeout
Function is NOT set to [0] Off.
If 8-04 Control Word Timeout Function is set to [5] 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 Word Timeout Time.
•
Check the operation of the communication
equipment.
•
Verify a proper installation based on EMC
requirements.
ALARM 18, Start failed
The speed has not been able to exceed 1-77 Compressor
Start Max Speed [RPM] during start within the allowed time
(set in 1-79 Compressor Start Max Time to Trip). This may be
caused by a blocked motor.
WARNING 23, Internal fan fault
The fan warning function is an extra protective function
that checks if the fan is running/mounted. The fan warning
can be disabled in 14-53 Fan Monitor ([0] Disabled).
For the D, E, and F-frame filters, the regulated voltage to
the fans is monitored.
Troubleshooting
•
Check for proper fan operation.
•
Cycle power to the adjustable frequency drive
and check that the fan operates briefly at start-
up.
•
Check the sensors on the heatsink and control
card.
Diagnostics and Troubleshoo...
Instruction Manual
40 Danfoss A/S © Rev. 11/06/2014 All rights reserved. MG11AK22
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