Troubleshooting - Danfoss VLT AQUA Drive FC 202 Operating Manual

Maintenance, Diagnostics, a...
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 frequency converter to
determine if the warning/alarm returns.
WARNING/ALARM 122, Mot. rotat. unexp.
The frequency converter 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 frequency converter 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
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 for more than 50 s
below the allowed minimum frequency
(parameter 1-98 ATEX ETR interpol. points freq.).
ALARM 166, ATEX ETR freq.lim.alarm
The frequency converter has operated for more than 60 s
(in a period of 600 s) below the allowed minimum
frequency (parameter 1-98 ATEX ETR interpol. points freq.).
ALARM 244, Heat Sink temperature
This alarm is only for enclosure type F frequency
converters. It is equivalent to ALARM 29, Heat Sink temp.
7.7 Troubleshooting
Symptom Possible cause
Missing input power.
Missing or open fuses, or circuit
breaker tripped.
No power to the LCP.
Short circuit on control voltage
(terminal 12 or 50) or at control
terminals.
Display
Incompatible LCP (LCP from
dark/No
®
function VLT 2800 or 5000/6000/8000/
FCD or FCM).
Wrong contrast setting.
Display (LCP) is defective.
Internal voltage supply fault or
SMPS is defective.
MG21A402
Operating Guide
The report value in the alarm log indicates which power
module generated the alarm:
WARNING 251, New typecode
The power card or other components are replaced, and the
type code has changed.
WARNING 250, New spare part
The power or switch mode supply has been exchanged.
Restore the frequency converter type code in the EEPROM.
Select the correct type code in parameter 14-23 Typecode
Setting according to the label on the frequency converter.
Remember to select Save to EEPROM at the end.
Test
See Table 4.5.
See Open power fuses and tripped circuit
breaker in this table for possible causes.
Check the LCP cable for proper connection or
damage.
Check the 24 V control voltage supply for
terminal 12/13 to 20–39, or 10 V supply for
terminal 50 to 55.
–
–
Test using a different LCP.
–
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1 = Leftmost inverter module.
2 = Middle inverter module in enclosure size F12
or F13.
2 = Right inverter module in enclosure size F10 or
F11.
2 = Second frequency converter from the left
inverter module in enclosure size F14 or F15.
3 = Right inverter module in enclosure sizes F12
or F13.
3 = Third from the left inverter module in
enclosure size F14 or F15.
4 = Far right inverter module in enclosure sizes
F14 or F15.
5 = Rectifier module.
6 = Right rectifier module in enclosure sizes F14
or F15.
Solution
Check the input power source.
Follow the recommendations provided.
Replace the faulty LCP or connection
cable.
Wire the terminals properly.
Use only LCP 101 (P/N 130B1124) or LCP
102 (P/N. 130B1107).
▲
Press [Status] + [ ]/[
contrast.
Replace the faulty LCP or connection
cable.
Contact supplier.
7
▼
] to adjust the
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