Danfoss VLT Series Design Manual page 172

8. Troubleshooting
ALARM 38, Internal fault:
Contact your local Danfoss supplier.
WARNING 47, 24 V supply low:
The external 24 V DC backup power supply
may be overloaded, otherwise contact your
Danfoss supplier.
ALARM 48, 1.8 V supply low:
Contact your Danfoss supplier.
WARNING 49, Speed limit:
The speed has been limited by range in par.
4-11 and par. 4-13.
ALARM 50, AMA calibration failed:
Contact your Danfoss supplier.
ALARM 51, AMA check Unom and Inom:
The setting of motor voltage, motor current
and motor power is presumably wrong. Check
the settings.
ALARM 52, AMA low Inom:
The motor current is too low. Check the set-
tings.
8
ALARM 53, AMA motor too big:
The motor is too big for the AMA to be carried
out.
ALARM 54,
AMA motor too small:
The motor is too small for the AMA to be car-
ried out.
ALARM 55, AMA par. out of range:
The par. values found from the motor are out-
side the acceptable range.
ALARM 56, AMA interrupted by user:
The AMA has been interrupted by the user.
ALARM 57, AMA timeout:
Try to start the AMA again a number of times
until it is carried out. Please note that repea-
ted runs may heat the motor to a level where
the resistances Rs and Rr are increased. In
most cases, however, this is not critical.
WARNING/ALARM 58, AMA internal
fault:
Contact your Danfoss supplier.
WARNING 59, Current limit:
The current is higher than the value in par.
4-18.
172
WARNING 62, Output Frequency at
Maximum Limit:
The output frequency is limited by the value
set in par. 4-19
ALARM 63, Mechanical Brake Low:
The actual motor current has not exceeded
the "release brake" current within the "Start
delay" time window.
WARNING 64, Voltage Limit:
The load and speed combinations demand a
motor voltage higher than the actual DC link
voltage.
WARNING/ALARM/TRIP
Card Overtemperature:
Control card overtemperature: The cut-out
temperature of the control card is 176° F [80°
C].
WARNING 66, Heatsink Temperature
Low:
The heatsink temperature is measured as 32°
F [0° C]. This could indicate that the temper-
ature sensor is defective and thus the fan
speed is increased to the maximum if the pow-
er part or the control card is very hot.
ALARM 67, Option Configuration has
Changed:
One or more options has either been added or
removed since the last power-down.
ALARM 70, Illegal Frequency Configura-
tion:
Current combination of control board and
power board is illegal.
ALARM 80, Drive Initialized to Default
Value:
Parameter settings are initialized to default
setting after a manual (three-finger) reset or
via par. 14-22.
MG.11.B4.22 - VLT ® is a registered Danfoss trademark.
VLT ® HVAC Drive Design Guide
65, Control