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will last approx. 1-2 sec, and the variable frequency
drive will then trip and emit an alarm. Switch off the
variable frequency drive and check whether the motor
shaft can be turned, and whether the size of the motor
is suitable for the variable frequency drive.
ALARM 14: Ground fault
There is a discharge from the output phases to ground,
either in the cable between the variable frequency drive
and the motor, or in the motor. Turn off the variable
frequency drive and remove the ground fault.
ALARM 15: Switch mode fault
Fault in switch mode power supply (internal supply).
Contact your Danfoss supplier.
ALARM 16: Short-circuit
There is a short-circuit on the motor terminals or in the
motor. Disconnect the electrical supply to the variable
frequency drive and remove the short-circuit.
WARNING/ALARM 17: Serial commu-
nication timeout
There is no serial communication to the variable
frequency drive. The warning will only be active when
514 Bus timeout function is set to a value other than
OFF. If parameter 514 Bus timeout function is set to
Stop and trip [5], it will first give a warning and then
ramp down and trip out accompanied by an alarm.
Parameter 513 Bus timeout can if required be increased
WARNING/ALARM 18: HPFB bus timeout
There is no serial communication to the variable
frequency drive's communication option card. This
warning will only be active when parameter 804 Bus
timeout function is set to a value other than OFF. If
parameter 804 Bus timeout function is set to Stop and
trip, it will first give a warning and then ramp down
and trip out accompanied by an alarm. Parameter
803 Bus timeout can if required be increased.
WARNING 33: Out of frequency range
This warning is active if the output frequency has
reached Output frequency low limit (parameter 201) or
Output frequency high limit (parameter 202). If the VLT
variable frequency drive is in Process regulation, closed
loop (parameter 100) the warning will be active in the
display. If the VLT variable frequency drive is in another
mode than Process regulation, closed loop, bit 008000
Out of frequency range in extended status word will be
active, but there will not be a warning in the display.
MG.90.F2.22 - VLT is a registered Danfoss trademark
Decentral Solutions
WARNING/ALARM 34: HPFB communication fault
Communication fault only occurs in Profibus versions.
ALARM 35: Inrush fault
This alarm occurs when the variable frequency
drive has been connected to the electrical supply
too many times within 1 minute.
WARNING/ALARM 36: Overtemperature
If the internal temperature rises above 165 - 185 °F (75 -
85 °C) (depending on the device) the variable frequency
drive will emit a warning, and the motor will continue to
run unchanged. If the temperature continues to rise,
the switch frequency is reduced automatically. See
Temperature-dependent switching frequency.
If the internal temperature of the heatsink rises
above 198 - 212 °F (92 - 100 °C) (depending on
the unit) the variable frequency drive will cut out.
The temperature fault cannot be reset until the
temperature of the internal heatsink has dropped to
below 158 °F (70 °C). The tolerance is ± 10%. The
temperature can be caused by the following:
- The ambient temperature too high.
If the internal temperature rises above 165 - 185 °F (75 -
85 °C) (depending on the device) the variable frequency
drive will emit a warning, and the motor will continue to
run unchanged. If the temperature continues to rise,
the switch frequency is reduced automatically. See
Temperature-dependent switching frequency.
If the internal temperature of the heatsink rises
above 198 - 212 °F (92 - 100 °C) (depending on
the unit) the variable frequency drive will cut out.
The temperature fault cannot be reset until the
temperature of the internal heatsink has dropped to
below 158 °F (70 °C). The tolerance is ± 10%. The
temperature can be caused by the following:
- The ambient temperature too high.
If the internal temperature rises above 165 - 185 °F (75 -
85 °C) (depending on the device) the variable frequency
drive will emit a warning, and the motor will continue to
run unchanged. If the temperature continues to rise,
the switch frequency is reduced automatically. See
Temperature-dependent switching frequency.
If the internal temperature of the heatsink rises
above 198 - 212 °F (92 - 100 °C) (depending on
the unit) the variable frequency drive will cut out.
The temperature fault cannot be reset until the
temperature of the internal heatsink has dropped to
191
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