Service manual

ALARM 14, Earth (ground) fault
There is current from the output phases to earth, either in
the cable between the frequency converter and the motor
or in the motor itself.
Troubleshooting:
Remove power to the frequency converter and
repair the earth fault.
Check for earth faults in the motor by measuring
the resistance to ground of the motor leads and
the motor with a megohmmeter.
ALARM 16, Short circuit
There is short-circuiting in the motor or motor wiring.
Remove power to the frequency converter 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 8-04 Control Word Timeout
Function is NOT set to OFF.
If 8-04 Control Word Timeout Function is set to Stop and
Trip, a warning appears and the frequency converter ramps
down until it trips, while giving an alarm. 8-03 Control
Timeout Time could possibly be increased.
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.
WARNING 24, External 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).
Troubleshooting
Check for proper fan operation.
Cycle power to the frequency converter and
check that the fan operates briefly at start-up.
Check the sensors on the heatsink and control
card.
ALARM 30, Motor phase U missing
Motor phase U between the frequency converter and the
motor is missing.
Remove power from the frequency converter and check
motor phase U.
ALARM 31, Motor phase V missing
Motor phase V between the frequency converter and the
motor is missing.
Remove power from the frequency converter and check
motor phase V.
ALARM 32, Motor phase W missing
Motor phase W between the frequency converter and the
motor is missing.
Remove power from the frequency converter and check
motor phase W.
ALARM 38, Internal fault
When an internal fault occurs, a code number defined in
Table 4.4 is displayed.
Troubleshooting
Cycle power
Check that the option is properly installed
Check for loose or missing wiring
It may be necessary to contact your Danfoss supplier or
service department. Note the code number for further
troubleshooting directions.
No. Text
0 Serial port cannot be initialised. Contact your
Danfoss supplier or Danfoss Service Department.
256-258 Power EEPROM data is defective or too old
512-519 Internal fault. Contact your Danfoss supplier or
Danfoss Service Department.
783 Parameter value outside of min/max limits
1024-1284 Internal fault. Contact your Danfoss supplier or the
Danfoss Service Department.
1299 Option SW in slot A is too old
1300 Option SW in slot B is too old
1302 Option SW in slot C1 is too old
1315 Option SW in slot A is not supported (not allowed)
1316 Option SW in slot B is not supported (not allowed)
1318 Option SW in slot C1 is not supported (not
allowed)
1379-2819 Internal fault. Contact your Danfoss supplier or
Danfoss Service Department.
2820 LCP stack overflow
2821 Serial port overflow
2822 USB port overflow
3072-5122 Parameter value is outside its limits
5123 Option in slot A: Hardware incompatible with
control board hardware
5124 Option in slot B: Hardware incompatible with
control board hardware
5125 Option in slot C0: Hardware incompatible with
control board hardware
5126 Option in slot C1: Hardware incompatible with
control board hardware
5376-6231 Internal fault. Contact your Danfoss supplier or
Danfoss Service Department.
Table 4.4 Internal Fault Codes
ALARM 44, Earth fault II
There is a discharge from the output phases to earth,
either in the cable between the frequency converter and
the motor or in the motor itself.
Troubleshooting
VLT
®
HVAC Basic Drive Service Manual
38 MG90X202 - VLT
®
is a registered Danfoss trademark
44