Danfoss VLT AutomationDrive FC 302 Operating Manual page 69

Maintenance, Diagnostics, a...
pressing [Reset] on the LCP). If automatic restart is
enabled, the motor can start when the fault is cleared.
ALARM 72, Dangerous failure
Safe Torque Off (STO) with trip lock. Unexpected signal
levels on safe torque off and digital input from the VLT
PTC Thermistor Card MCB 112.
WARNING 73, Safe Stop auto restart
Safe Torque Off (STO). With automatic restart enabled, the
motor can start when the fault is cleared.
ALARM 74, PTC Thermistor
®
Alarm related to VLT PTC Thermistor Card MCB 112. The
PTC is not working.
ALARM 75, Illegal profile sel.
Do not write the parameter value while the motor is
running. Stop the motor before writing the MCO profile to
parameter 8-10 Control Word Profile.
WARNING 76, Power unit setup
The required number of power units does not match the
detected number of active power units. When replacing an
enclosure size F module, this warning occurs if the power-
specific data in the module power card does not match
the rest of the drive. If the power card connection is lost,
the unit also triggers this warning.
Troubleshooting
•
Confirm that the spare part and its power card
are the correct part number.
•
Ensure that the 44-pin cables between the MDCIC
and power cards are mounted properly.
WARNING 77, Reduced power mode
This warning indicates that the drive is operating in
reduced power mode (that is, less than the allowed
number of inverter sections). This warning is generated on
power cycle when the drive is set to run with fewer
inverters and remains on.
ALARM 78, Tracking error
The difference between setpoint value and actual value
exceeds the value in parameter 4-35 Tracking Error.
Troubleshooting
•
Disable the function or select an alarm/warning
in parameter 4-34 Tracking Error Function.
•
Investigate the mechanics around the load and
motor. Check feedback connections from motor
encoder to drive.
•
Select motor feedback function in
parameter 4-30 Motor Feedback Loss Function.
•
Adjust the tracking error band in
parameter 4-35 Tracking Error and
parameter 4-37 Tracking Error Ramping.
ALARM 79, Illegal power section configuration
The scaling card is the incorrect part number or not
installed. Also, the MK102 connector on the power card
could not be installed.
MG38A202
Operating Guide
ALARM 80, Drive initialised to default value
Parameter settings are initialized to default settings after a
manual reset. To clear the alarm, reset the unit.
ALARM 81, CSIV corrupt
® CSIV file has syntax errors.
ALARM 82, CSIV parameter error
CSIV failed to initialize a parameter.
ALARM 83, Illegal option combination
The mounted options are incompatible.
ALARM 84, No safety option
The safety option was removed without applying a general
reset. Reconnect the safety option.
ALARM 85, Dang fail PB
PROFIBUS/PROFIsafe error.
ALARM 88, Option detection
A change in the option layout is detected.
Parameter 14-89 Option Detection is set to [0] Frozen config-
uration and the option layout has been changed.
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•
WARNING 89, Mechanical brake sliding
The hoist brake monitor detects a motor speed exceeding
10 RPM.
ALARM 90, Feedback monitor
Check the connection to encoder/resolver option and, if
necessary, replace VLT
Resolver Input MCB 103.
ALARM 91, Analog input 54 wrong settings
Set switch S202 in position OFF (voltage input) when a
KTY sensor is connected to analog input terminal 54.
ALARM 99, Locked rotor
The rotor is blocked.
WARNING/ALARM 104, Mixing fan fault
The fan is not operating. The fan monitor checks that the
fan is spinning at power-up or whenever the mixing fan is
turned on. The mixing-fan fault can be configured as a
warning or an alarm trip in parameter 14-53 Fan Monitor.
Troubleshooting
•
WARNING/ALARM 122, Mot. rotat. unexp.
The drive performs a function that requires the motor to
be at standstill, for example DC hold for PM motors.
WARNING 163, ATEX ETR cur.lim.warning
The drive has run above the characteristic curve for more
than 50 s. The warning is activated at 83% and deactivated
at 65% of the allowed thermal overload.
ALARM 164, ATEX ETR cur.lim.alarm
Operating above the characteristic curve for more than
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To apply the change, enable option layout
changes in parameter 14-89 Option Detection.
Alternatively, restore the correct option configu-
ration.
®
Encoder Input MCB 102 or VLT
Cycle power to the drive to determine if the
warning/alarm returns.
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