ALARM 63, Mechanical brake low
The actual motor current has not exceeded the “release
brake” current within the “Start delay” time window.
WARNING/ALARM 65, Control card over temperature
The cutout temperature of the control card is 176°F [80
°
C].
Troubleshooting
•
Check that the ambient operating temperature is
within limits.
•
Check for clogged filters.
•
Check fan operation.
•
Check the control card.
WARNING 66, Heatsink temperature low
The Adjustable frequency drive is too cold to operate. This
warning is based on the temperature sensor in the IGBT
module.
Increase the ambient temperature of the unit. Also, a
trickle amount of current can be supplied to the
Adjustable frequency drive whenever the motor is stopped
by setting
2-00 DC Hold/Preheat Current
at 5% and
1-80 Function at Stop
ALARM 67, Option module configuration has changed
One or more options have either been added or removed
since the last power-down. Check that the configuration
change is intentional and reset the unit.
ALARM 68, Safe stop activated
Loss of the 24V DC signal on terminal 37 has caused the
filter to trip. To resume normal operation, apply 24V DC to
terminal 37 and reset the filter.
ALARM 69, Power card temperaturePower card
temperature
The temperature sensor on the power card is either too
hot or too cold.
Troubleshooting
Check that the ambient operating temperature is
within limits.
Check for clogged filters.
Check fan operation.
Check the power card.
ALARM 70, Illegal FC configuration
The control card and power card are incompatible. Contact
your supplier with the type code of the unit from the
nameplate and the part numbers of the cards to check
compatibility.
ALARM 71, PTC 1 safe stop
Safe Stop has been activated from the PTC Thermistor
Card (motor too warm). Normal operation can be resumed
when the applies 24 V DC to T-37 again (when the motor
temperature reaches an acceptable level) and when the
digital Input from the is deactivated. When that happens, a
reset signal must be is be sent (via Bus, Digital I/O, or by
pressing [RESET]).
ALARM 72, Dangerous failure
Safe Stop with Trip Lock. The dangerous failure alarm is
issued if the combination of safe stop commands is
unexpected. This is the case if the VLT enables X44/10 but
safe stop is somehow not enabled. Furthermore, if the is
the only device using safe stop (specified through
selection [4] or [5] in
5-19 Terminal 37 Safe Stop
), an
unexpected combination is activation of safe stop without
the X44/10 being activated. The following table
summarizes the unexpected combinations that lead to
Alarm 72. Note that if X44/10 is activated in selection 2 or
3, this signal is ignored! However, the will still be able to
activate Safe Stop.
WARNING 73, Safe stop auto restart
Safe stopped. Note that with automatic restart enabled,
the motor may start when the fault is cleared.
ALARM 74, PTC Thermistor
Alarm related to the ATEX option. The PTC is not working.
ALARM 75, Illegal profile sel.
Parameter value must not be written while motor is
running. Stop motor before writing MCO profile to
8-10 Control Word Profile
for instance.
WARNING 76, Power unit set-up
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 Adjustable frequency drive. Please
confirm the spare part and its power card are the correct
part number.
77 WARNING, Reduced power mode
This warning indicates that the Adjustable frequency drive
is operating in reduced power mode (i.e., less than the
allowed number of inverter sections). This warning will be
generated on power cycle when the Adjustable frequency
drive is set to run with fewer inverters and will remain on.
ALARM 78, Tracking error
The difference between setpoint value and actual value
has exceeded the value in
4-35 Tracking Error
. Disable the
function by
4-34 Tracking Error Function
or select an alarm/
warning also in
4-34 Tracking Error Function
. Investigate the
mechanics around the load and motor. Check feedback
connections from motor – encoder – to Adjustable
frequency drive. Select motor feedback function in
4-30 Motor Feedback Loss Function
. Adjust tracking error
band in
4-35 Tracking Error
and
4-37 Tracking Error
Ramping
.
Troubleshooting
FC 300 Programming Guide
MG33MD22 - VLT
®
is a registered Danfoss trademark
5-11
5
5
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