Danfoss VLT AutomationDrive FC 302 Programming Manual page 224

Troubleshooting
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, Locked rotor
Rotor is blocked.
WARNING/ALARM 104, Mixing fan fault
The fan is not operating. The fan monitor checks that the
5 5
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 parameter 14-53 Fan Monitor.
Troubleshooting
Cycle power to the frequency converter to
determine if the warning/alarm returns.
WARNING/ALARM 122, Mot. rotat. unexp.
Frequency converter is performing a function that requires
the motor to be at standstill, e.g. DC hold for PM motors.
WARNING 123, Motor Mod. Changed
The motor selected in parameter 1-11 Motor Model is not
correct and the selection has been corrected
WARNING 163, ATEX ETR cur.lim.warning
The frequency converter has run above the characteristic
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.
WARNING 165, ATEX ETR freq.lim.warning
The frequency converter is running more than 50 s below
the permitted minimum frequency (parameter 1-98 ATEX
ETR interpol. points freq. [0]).
ALARM 166, ATEX ETR freq.lim.alarm
The frequency converter has operated more than 60 s (in a
period of 600 s) below the permitted minimum frequency
(parameter 1-98 ATEX ETR interpol. points freq. [0]).
ALARM 246, Power card supply
This alarm is only for F Frame frequency converters. It is
equivalent to Alarm 46. The report value in the alarm log
indicates which power module generated the alarm:
1 = left most inverter module.
2 = middle inverter module in F2 or F4 frequency
converter.
2 = right inverter module in F1 or F3 frequency
converter.
3 = right inverter module in F2 or F4 frequency
converter.
5 = rectifier module.
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VLT AutomationDrive FC 301/302 Programming Guide
WARNING 250, New spare part
A component in the frequency converter has been
replaced. Reset the frequency converter for normal
operation.
WARNING 251, New typecode
The power card or other components have been replaced
and the typecode changed. Reset to remove the warning
and resume normal operation.
MG33MI02 - Rev. 2013-11-20