Danfoss VLT AutomationDrive FC 302 Instruction Manual page 60

Maintenance, Diagnostics an...
112 is deactivated. When that happens, send a reset signal
(via bus or digital I/O, or press [Reset]).
ALARM 72, Dangerous failure
STO with trip lock. An unexpected combination of STO
commands has occurred:
•
VLT PTC Thermistor Card enables X44/10, but STO
is not enabled.
•
MCB 112 is the only device using STO (specified
through selection [4] PTC 1 Alarm or [5] PTC 1
Warning in parameter 5-19 Terminal 37 Safe Stop),
STO is activated, and X44/10 is not activated.
WARNING 73, Safe Stop auto restart
Safe Torque Off activated. With automatic restart enabled,
the motor can start when the fault is cleared.
7 7
ALARM 74, PTC Thermistor
Alarm related to VLT
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
parameter 8-10 Control Word Profile.
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 warning occurs, if
the power-specific data in the module power card does
not match the rest of the adjustable frequency drive.
Confirm that the spare part and its power card are the
correct part number.
WARNING 77, Reduced power mode
The adjustable frequency drive is operating in reduced
power mode (less than the allowed number of inverter
sections). This warning is generated on power cycle when
the adjustable frequency drive is set to run with fewer
inverters and remains on.
ALARM 78, Tracking error
The difference between the setpoint value and the actual
value has exceeded the value in parameter 4-35 Tracking
Error. 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 adjustable frequency
drive. Select motor feedback function in
parameter 4-30 Motor Feedback Loss Function. Adjust
tracking error band in parameter 4-35 Tracking Error and
parameter 4-37 Tracking Error Ramping.
58
®
VLT AutomationDrive FC 302
®
PTC Thermistor Card MCB 112. The
Danfoss A/S © 06/2015 All rights reserved.
ALARM 79, Illegal power section configuration
The scaling card has an incorrect part number or is not
installed. The MK102 connector on the power card could
not be installed.
ALARM 80, Drive initialized 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 88, Option detection
A change in the option layout was detected.
Parameter 14-89 Option Detection is set to [0] Frozen config-
uration and the option layout has been changed.
•
To apply the change, enable option layout
changes in parameter 14-89 Option Detection.
•
Alternatively, restore the correct option configu-
ration.
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 Encoder Input MCB 102 or 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
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
•
Cycle power to the adjustable frequency drive to
determine if the warning/alarm returns.
WARNING/ALARM 122, Mot. rotat. unexp.
The adjustable frequency drive performs a function that
requires the motor to be at standstill, for example, DC hold
for PM motors.
®
MG34U422