kinetic backup if the acceleration during ramp-up is quick.
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, Earth (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 tted option is not operational with the present control
board hardware or software.
Record the value of the following parameters and contact
your Danfoss supplier:
parameter 15-40 FC Type
parameter 15-41 Power Section
parameter 15-42 Voltage
parameter 15-43 Software Version
parameter 15-45 Actual Typecode String
parameter 15-49 SW ID Control Card
parameter 15-50 SW ID Power Card
parameter 15-60 Option Mounted
parameter 15-61 Option SW Version (for each
option slot)
ALARM 16, Short circuit
There is short-circuiting 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 frequency converter.
The warning is only active when parameter 8-04 Control
Word Timeout Function is NOT set to [0] O.
If parameter 8-04 Control Word Timeout Function is set to [5]
Stop and Trip, a warning appears and the frequency
converter ramps down until it stops then displays an
alarm.
Troubleshooting
Check connections on the serial communication
cable.
Increase parameter 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 exceeded parameter 1-77 Compressor
Start Max Speed [RPM] during start within the allowed time.
(set in parameter 1-79 Compressor Start Max Time to Trip).
This may be caused by a blocked motor.
Warning/Alarm 19, Discharge Temperature High
Warning:
The discharge temperature exceeds the level programmed
in 28-25 Warning Level.
Alarm:
The discharge temperature exceeds the level programmed
in 28-26 Emergency Level.
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
reported in the LCP. The aected parameter must be set to
a valid value.
WARNING/ALARM 22, Hoist mechanical brake
Report value shows what kind it is.
0 = The torque ref. was not reached before time-out.
1 = There was no brake feedback before time-out.
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 parameter 14-53 Fan Monitor ([0]
Disabled).
For the D, E, and F Frame lters, 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 briey at start-
up.
Check the sensors on the heatsink and control
card.
Troubleshooting Operating Instructions
MG34M422 Danfoss A/S © Rev. 2013-07-03 All rights reserved. 155
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