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 VDC to the terminal
programmed for external interlock and reset the adjustable frequency drive (via serial communi-
cation, digital I/O, or by pressing the reset button on LCP).
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/Alarm/Disable is set in par. 4-30
Motor Feed-
back Loss Function
, error setting in par. 4-31
Motor Feedback Speed Error
, and the allowed error
time in par. 4-32
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
Max Output Frequency
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 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. See the ratings table in
Section 1.9 for the temperature reading that will trigger this warning.
Troubleshooting:
The heatsink temperature measured as 32°F [0
°
C] could indicate that the temperature sensor is
defective, thereby 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 is produced. Also, check the IGBT
thermal sensor (see section 6.2.8).
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 VDC to terminal 37, then
send a reset signal (via bus, digital I/O, or by pressing the reset key. See par. 5-19
Terminal 37
Safe Stop
.
ALARM 69, Power card temperature
The temperature sensor on the power card is either too hot or too cold. See the ratings table in
Section 1.9 for the high and low temperatures that can cause this alarm.
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 IP21 and IP54 (NEMA 1 and NEMA
12) adjustable frequency drives.
High Power Service Manual for VLT
®
FC Series
Adjustable Frequency Drives
4 Troubleshooting
MG.90.L1.22 - VLT
®
is a registered Danfoss trademark
4-17
4
Summary of Contents for VLT HVAC FC 100
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