ALARM 35: Inrush fault
This alarm occurs when the adjustable frequency drive has
been connected to the mains supply too many times
within 1 minute.
WARNING/ALARM 36: Overtemperature
If the temperature inside the power module rises above
75-85 °C (depending on the device), the adjustable
frequency drive emits a warning, and the motor continues
to run unchanged. If the temperature continues to rise, the
switch frequency is reduced automatically. See
chapter 5.1.9 Temperature-Dependent Switching Frequency
for further details.
If the temperature inside the power module rises above
92-100 °C (depending on the unit), the adjustable
frequency drive cuts out. The temperature fault cannot be
reset until the temperature has dropped below 70 °C. The
tolerance is ±5 °C. Causes for overtemperature:
•
The ambient temperature too high.
•
Motor cables are too long.
•
Too high mains voltage.
ALARM 37-45: Internal fault
If one of these failures occurs, contact Danfoss.
Alarm 37, internal fault number 0: Communication fault
between control card and BMC.
Alarm 38, internal fault number 1: Flash EEPROM fault on
control card.
Alarm 39, internal fault number 2: RAM fault on control
card.
Alarm 40, internal fault number 3: Calibration constant in
EEPROM.
Alarm 41, internal fault number 4: Data values in EEPROM.
Alarm 42, internal fault number 5: Fault in motor
parameter database.
Alarm 43, internal fault number 6: General power card
fault.
Alarm 44, internal fault number 7: Minimum software
version of control card or BMC.
Alarm 45, internal fault number 8: I/O fault (digital input/
output, relay or analog input/output).
NOTICE
When restarting after an alarm 38-45, the adjustable
frequency drive displays an alarm 37. In parameter 615
Fault log: Error code, the actual alarm code can be read.
ALARM 50: AMT not possible
One of the following three possibilities can occur:
•
The calculated R
S
value is outside permitted
limits.
•
The motor current in at least one of the motor
phases is too low.
•
The motor in use is too small for AMT
calculations to be performed.
ALARM 51: AMT Fault regarding nameplate data
There is inconsistency between the registered motor data.
Check the motor data for the relevant set-up.
ALARM 52: AMT missing motor phase
The AMT function has detected a missing motor phase.
ALARM 55: AMT time-out
Calculations are taking too long, possibly due to noise on
the motor cables.
ALARM 56: AMT warning during AMT
A adjustable frequency drive warning is given while AMT is
being performed.
WARNING 99: Locked
See parameter 18.
Without brake With brake Without brake With brake
VLT 2800 1/3 x 200-240 V
[V DC]
1/3 x 200-240 V
[V DC]
3x380-480 V
[V DC]
3x380-480 V
[V DC]
Undervoltage 215 215 410 410
Voltage warning low 230 230 440 440
Voltage warning high 385 400 765 800
Overvoltage 410 410 820 820
Table 5.9 Alarm/Warning Limits
The voltages stated are the intermediate circuit voltage of the adjustable frequency drive with a tolerance of ±5 %. The
corresponding line voltage is the intermediate circuit voltage divided by 1.35.
All about VLT 2800 Design Guide
MG27E402 Danfoss A/S © Rev. May/2014 All rights reserved. 139
5 5
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