Fault
num‐
ber
Alarm/
warning
bit num‐
ber
Fault text Warn‐
ing
Alarm Trip
lock
Cause of problem
44 28 Earth Fault – X X Discharge from output phases to ground, using the value
of parameter 15-31 Alarm Log Value if possible.
46 33 Control Volt-
age Fault
– X X Control voltage is low. Contact the local Danfoss supplier.
47 23 24 V supply
low
X X X 24 V DC supply may be overloaded.
50 – AMA calibra-
tion failed
– X – Contact the local Danfoss supplier.
51 15 AMA U
nom
, I
nom
– X – The setting of motor voltage, motor current, and motor
power is wrong. Check the settings.
52 – AMA low I
nom
– X – The motor current is too low. Check the settings.
53 – AMA big motor – X – The motor is too big to perform AMA.
54 – AMA small mot – X – The motor is too small to perform AMA.
55 – AMA par. range – X – The parameter values found from the motor are outside
the acceptable range.
56 – AMA user in-
terrupt
– X – The AMA has been interrupted.
57 – AMA timeout – X – Try to start the AMA again some times, until the AMA is
carried out.
NOTICE
Repeated runs may heat the motor to a level
where the resistance R
s
and R
r
are increased. Usu-
ally, however, this is not critical.
58 – AMA internal X X – Contact the local Danfoss supplier.
59 25 Current limit X – – The current is higher than the value in parameter 4-18 Cur-
rent Limit.
60 44 External Inter-
lock
– X – External interlock has been activated. To resume normal
operation, apply 24 V DC to the terminal programmed for
external interlock and reset the drive (via serial communi-
cation, digital I/O, or by pressing [Reset] on the LCP).
66 26 Heat sink Tem-
perature Low
X – – This warning is based on the temperature sensor in the
IGBT module (on 400 V, 30 kW (40 hp) and 600 V units).
69 1 Pwr. Card
Temp
X X X The temperature sensor on the power card exceeds the
upper or lower limits.
70 36 Illegal FC con-
figuration
– X X The control card and power card are not matched.
79 – Illegal power
section config-
uration
X X – Internal fault. Contact the local Danfoss supplier.
Troubleshooting
Operating Guide | VLT® Compressor Drive CDS 803
AQ321748767627en-000101 / 130R0570| 41
Danfoss A/S © 2019.12
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