Danfoss FC 100 Series Operating Instructions Manual page 131

Troubleshooting
ALARM 46, Power card supply
The supply on the power card is out of range.
There are three power supplies generated by the switch mode
power supply (SMPS) on the power card: 24 V, 5V, +/- 18V.
When powered with 24 VDC with the MCB 107 option, only
the 24 V and 5 V supplies are monitored. When powered with
three phase mains voltage, all three supplied are monitored.
WARNING 47, 24 V supply low
The 24 V DC is measured on the control card. The external V
DC backup power supply may be overloaded, otherwise
contact your Danfoss supplier.
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 specified limit in par. 1-86 Trip Speed Low [RPM]
(except when starting or 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 presumably wrong. Check the settings.
ALARM 52, AMA low Inom
The motor current is too low. Check the settings.
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 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 resistance 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 Current
Limit.
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 frequency converter (via serial
communication, digital I/O, or by pressing reset button on
keypad).
®
VLT HVAC Drive Operating Instructions
WARNING 62, Output frequency at maximum limit
The output frequency is higher than the value set in
par. 4-19 Max Output Frequency
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 over temperature
Control card over temperature: The cutout temperature of the
control card is 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 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:
ALARM 70, Illegal FC Configuration
Actual combination of control board and power board is
illegal.
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 73, Safe stop auto restart
Safe stopped. Note that with automatic restart enabled, the
motor may start when the fault is cleared.
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. Please confirm the spare part and its
power card are the correct part number.
®
MG.11.AD.02 - VLT is a registered Danfoss trademark
Check the operation of the door fans.
Check that the filters for the door fans are not
blocked.
Check that the gland plate is properly installed on IP
21 and IP 54 (NEMA 1 and NEMA 12) drives.
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