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VLT
®
HVAC Drive Instruction Manual
WARNING 48, 1.8 V supply low
The 1.8 V DC supply used on the control card is outside of allowable limits.
The power supply is measured on the control card.
WARNING 49, Speed limit
When the speed is not within the specified range in par. 4-11 and par.
4-13, the drive will show a warning. When the speed is below the speci-
Trip Speed Low [RPM]
fied limit in par. 1-86
stopping), the drive will trip.
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 pre-
sumably wrong. Check the settings.
ALARM 52, AMA low Inom
The motor current is too low. Check the settings.
ALARM 53, AMA big motor
The motor is too big for the AMA to be carried out.
ALARM 54, AMA small motor
The motor is too big for the AMA to be carried out.
ALARM 55, AMA Parameter out of range
The parameter values found from the motor are outside 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 the AMA is carried
out. Please note that repeated runs may heat the motor to a level where
the resistances Rs and Rr are increased. In most cases, however, this is
not critical.
ALARM 58, AMA internal fault
Contact your Danfoss supplier.
WARNING 59, Current limit
The current is higher than the value in par. 4-18
WARNING 60, External interlock
External interlock has been activated. To resume normal operation, apply
24 V DC to the terminal programmed for external interlock and reset the
adjustable frequency drive (via serial communication, digital I/O, or by
pressing reset button on keypad).
WARNING 61, Tracking error
An error has been detected between the calculated motor speed and the
speed measurement from the feedback device. The function for warning/
Motor Feedback Loss Function
alarm/disable is set in 4-30,
Motor Feedback Speed Error
in 4-31,
Motor Feedback Loss Timeout
. During a commissioning procedure the
function may be effective.
WARNING 62, Output frequency at maximum limit
The output frequency is higher than the value set in par. 4-19
Frequency
(except when starting or
Current Limit
.
, error setting
, and the allowed error time in 4-32,
Max Output
MG.11.AB.22 - VLT
®
is a registered Danfoss trademark
WARNING 64, Voltage limit
The load and speed combination demands a motor voltage higher than
the actual DC link voltage.
WARNING/ALARM/TRIP 65, Control card overtemperature
Control card overtemperature: The cutout temperature of the control
card is 176°F [80°C].
WARNING 66, Heatsink temperature low
This warning is based on the temperature sensor in the IGBT module.
Troubleshooting:
The heatsink temperature measured as 32°F [0°C] could indicate that the
temperature sensor is defective causing the fan speed to increase to the
maximum. If the sensor wire between the IGBT and the gate drive card
is disconnected, this warning would result. Also, check the IGBT thermal
sensor.
ALARM 67, Option module configuration has changed
One or more options have either been added or removed since the last
power-down.
ALARM 68, Safe stop activated
Safe stop has been activated. To resume normal operation, apply 24 V
DC to terminal 37, then send a reset signal (via Bus, Digital I/O, or by
pressing the reset key. See par. .
ALARM 69, Power card temperature
The temperature sensor on the power card is either too hot or too cold.
Troubleshooting:
Check the operation of the door fans.
Make sure that the filters for the door fans are not blocked.
Make sure that the gland plate is properly installed on IP 21 and
IP 54 (NEMA 1 and NEMA 12) drives.
ALARM 70, Illegal FC Configuration
Actual combination of control board and power board is illegal.
WARNING/ALARM 71, PTC 1 safe stop
Safe Stop has been activated from the MCB 112 PTC Thermistor Card
(motor too warm). Normal operation can be resumed when the MCB 112
applies 24 V DC to T-37 again (when the motor temperature reaches an
acceptable level) and when the digital input from the MCB 112 is deacti-
vated. When that happens, a reset signal must be sent (via serial com-
munication, digital I/O, or by pressing reset button on keypad). Note that
if automatic restart is enabled, the motor may start when the fault is
cleared.
ALARM 72, Dangerous failure
Safe stop with trip lock. Unexpected signal levels on safe stop and digital
input from the MCB 112 PTC thermistor card.
Warning 76, Power Unit Setup
The required number of power units does not match the detected number
of active power units.
Troubleshooting:
When replacing an F frame module, this will occur if the power specific
data in the module power card does not match the rest of the drive.
8 Troubleshooting
8
8-9
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