WARNING 62, Output frequency at maximum limit
The output frequency has reached the value set in
4-19 Max
Output Frequency
. Check the application to determine the
cause. Possibly increase the output frequency limit. Be sure
the system can operate safely at a higher output frequency.
The warning will clear when the output drops below the
maximum limit.
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 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 frequency converter 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 frequency
converter 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 frequency converter.
ALARM 68, Safe stop activated
Loss of the 24V DC signal on terminal 37 has caused the
frequency converter to trip. To resume normal operation,
apply 24V DC to terminal 37 and reset the frequency
converter.
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 typecode 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 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 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 MCB 112 VLT PTC
Thermistor Card enables X44/10 but safe stop is somehow
not enabled. Furthermore, if the MCB 112 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 MCB 112 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 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 frequency converter. Please confirm
the spare part and its power card are the correct part
number.
77 WARNING, Reduced power mode
This warning indicates that the frequency converter 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 frequency converter is set to run
with fewer inverters and will remain on.
ALARM 78, Tracking error
The difference between set point 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 frequency converter.
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
.
Warnings and Alarms
VLT
®
AutomationDrive Operating
Instructions
MG.33.AJ.02 - VLT
®
is a registered Danfoss trademark
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