Danfoss VLT AutomationDrive FC 301 Instruction Manual page 49

Diagnostics and Troubleshoo...
ALARM 72, Dangerous failure
Safe Stop with trip lock. An unexpected combination of
safe stop commands has occurred:
•
VLT PTC Thermistor Card enables X44/10 but safe
stop is not enabled.
•
MCB 112 is the only device using safe stop
(specified through selection [4] or [5] in
5-19 Terminal 37 Safe Stop), safe stop is activated,
and X44/10 is not activated.
WARNING 73, Safe stop auto restart
Safe stopped. 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.
WARNING 77, Reduced power mode
The adjustable frequency drive is operating in reduced
power mode (i.e., 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 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.
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 init a parameter.
MG33AN22
Instruction Manual
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 was detected. 14-89 Option
Detection is set to [0] Frozen configuration and the option
layout has been changed.
•
•
WARNING 89, Mechanical brake sliding
The hoist brake monitor has detected a motor speed > 10
RPM.
ALARM 90, Feedback monitor
Check the connection to encoder/resolver option and
eventually replace the MCB 102 or MCB 103.
ALARM 91, Analog input 54 wrong settings
Switch S202 has to be set in position OFF (voltage input)
when a KTY sensor is connected to analog input terminal
54.
ALARM 99, Blocked 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 by 14-53 Fan Monitor.
Troubleshooting
WARNING/ALARM 122, Mot. rotat. unexp.
The motor is rotating unexpectedly. The adjustable
frequency drive is performing 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 adjustable frequency drive has exceeded the charac-
teristic curve for more than 50 s. The warning is activated
at 83% and de-activated at 65% of the permitted thermal
overload.
ALARM 164, ATEX ETR cur.lim.alarm
Operating above the characteristic curve for more than 60
s within a period of 600 s activates the alarm and the
frequency converter trips.
Danfoss A/S © Rev. 2014-02-10 All rights reserved.
To apply the change, enable option layout
changes in 14-89 Option Detection.
Alternatively, restore the correct option configu-
ration.
Cycle power to the adjustable frequency drive to
determine if the warning/alarm returns.
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