Danfoss VLT AutomationDrive FC 303 Instruction Manual page 69

Warnings and Alarms
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
sent (via Bus, Digital I/O, or by pressing [RESET]).
ALARM 72, Dang. 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
8 8
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 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.
8-10
VLT ® AutomationDrive Instruction
Manual
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 is the incorrect part number or not
installed. Also 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. Reset the unit to clear the alarm.
ALARM 81, CSIV corrupt
CSIV file has syntax errors.
ALARM 82, CSIV par. err.
CSIV failed to init a parameter.
ALARM 83, Illegal option combination
The mounted options are not supported to work together.
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 has been detected. This
alarm occurs when 14-89 Option Detection is set to [0]
Frozen configuration and the option layout for some reason
has changed. An option layout change has to be enabled
in 14-89 Option Detection before the change is accepted. If
the change of configuration is not accepted, it is only
possible to reset Alarm 88 (Trip-lock) when the option
configuration has been re-established/corrected.
WARNING 89, Mechanical brake sliding
The hoist brake monitor has detected a motor speed >
10rpm.
ALARM 90, Feedback mon.
Check the connection to encoder/ resolver option and
eventually replace the MCB 102 or MCB 103.
ALARM 91, Analogue 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 92, No flow
A no-flow condition has been detected in the system.
22-23 No-Flow Function is set for alarm. Troubleshoot the
system and reset the Adjustable frequency drive after the
fault has been cleared.
®
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