Manual

Fault
num‐
ber
Alarm/
warning
bit num‐
ber
Fault text Warn‐
ing
Alarm Trip
locked
Cause of problem
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 Unom,
Inom
– X – The setting of motor voltage, motor current, and motor
power is wrong. Check the settings.
52 – AMA low In-
om
– X – The motor current is too low. Check the settings.
53 – AMA big mo-
tor
– 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 by the user.
57 – AMA timeout – X – Try to start the AMA again a number of 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. In
most cases, 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
Current Limit.
60 44 External In-
terlock
– 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] key on the LCP).
66 26 Heat sink
Temperature
Low
X – – This warning is based on the temperature sensor in the
IGBT module (on 400 V, 30–90 kW (40–125 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
configuration
– X X The control card and power card are not matched.
79 – Illegal power
section con-
figuration
X X – Internal fault. Contact the local Danfoss supplier.
Warnings and Alarms
Operating Guide | VLT® HVAC Basic Drive FC 101
AQ275641848264en-000101 / 132R0078
64 | Danfoss A/S © 2019.11