Danfoss vlt FC 102 User Manual

9.1.1 Fault Messages
WARNING 1, 10 volts low
The control card voltage is below 10 V from terminal 50.
Remove some of the load from terminal 50, as the 10 V supply is over-
loaded. Max. 15 mA or minimum 590 Ω.
This condition can be caused by a short in a connected potentiometer or
improper wiring of the potentiometer.
Troubleshooting: Remove the wiring from terminal 50. If the warning
clears, the problem is with the customer wiring. If the warning does not
clear, replace the control card.
WARNING/ALARM 2, Live zero error
This warning or alarm will only appear if programmed by the user in
par. 6-01
Live Zero Timeout Function . The signal on one of the analog
inputs is less than 50% of the minimum value programmed for that input.
This condition can be caused by broken wiring or faulty device sending
the signal.
Troubleshooting:
Check connections on all the analog input terminals. Control
card terminals 53 and 54 for signals, terminal 55 common. MCB
101OPCGPIO terminals 11 and 12 for signals, terminal 10 com-
mon. MCB 109OPCAIO terminals 1, 3, 5 for signals, terminals 2,
4, 6 common).
Check that the drive programming and switch settings match
the analog signal type.
Perform Input Terminal Signal Test.
WARNING/ALARM 3, No motor
No motor has been connected to the output of the frequency converter.
This warning or alarm will only appear if programmed by the user in
par. 1-80
Function at Stop .
Troubleshooting: Check the connection between the drive and the mo-
tor.
WARNING/ALARM 4, Mains phase loss A phase is missing on the
supply side, or the mains voltage imbalance is too high. This message
also appears for a fault in the input rectifier on the frequency converter.
Options are programmed at par. 14-12 Function at Mains Imbalance .
Troubleshooting: Check the supply voltage and supply currents to the
frequency converter.
WARNING 5, DC link voltage high
The intermediate circuit voltage (DC) is higher than the high voltage
warning limit. The limit is dependent on the drive voltage rating. The
frequency converter is still active.
WARNING 6, DC link voltage low
The intermediate circuit voltage (DC) is lower than the low voltage warn-
ing limit. The limit is dependent on the drive voltage rating. The frequency
converter is still active.
WARNING/ALARM 7, DC overvoltage
If the intermediate circuit voltage exceeds the limit, the frequency con-
verter trips after a time.
Troubleshooting:
Connect a brake resistor
Extend the ramp time
Change the ramp type
Activate functions in par. 2-10 Brake Function
Increase par. 14-26 Trip Delay at Inverter Fault
WARNING/ALARM 8, DC under voltage
If the intermediate circuit voltage (DC) drops below the under voltage
limit, the frequency converter checks if a 24 V backup supply is connec-
ted. If no 24 V backup supply is connected, the frequency converter trips
after a fixed time delay. The time delay varies with unit size.
Troubleshooting:
Check that the supply voltage matches the frequency converter
voltage.
Perform Input voltage test
Perform soft charge and rectifier circuit test
WARNING/ALARM 9, Inverter overloaded
The frequency converter is about to cut out because of an overload (too
high current for too long). The counter for electronic, thermal inverter
protection gives a warning at 98% and trips at 100%, while giving an
alarm. The frequency converter cannot be reset until the counter is below
90%.
The fault is that the frequency converter is overloaded by more than
100% for too long.
Troubleshooting:
Come the output current shown on the LCP keypad with the
drive rated current.
Come the output current shown on the LCP keypad with meas-
ured motor current.
Display the Thermal Drive Load on the keypad and monitor the
value. When running above the drive continuous current rating,
the counter should increase. When running below the drive con-
tinuous current rating, the counter should decrease.
NOTE: See the derating section in the Design Guide for more details if a
high switching frequency is required.
WARNING/ALARM 10, Motor overload temperature
According to the electronic thermal protection (ETR), the motor is too hot.
Select whether the frequency converter gives a warning or an alarm when
the counter reaches 100% in par. 1-90 Motor Thermal Protection . The
fault is that the motor is overloaded by more than 100% for too long.
Troubleshooting:
Check if motor is over heating.
If the motor is mechanically overloaded
That the motor par. 1-24 Motor Current is set correctly.
Motor data in parameters 1-20 through 1-25 are set correctly.
The setting in par. 1-91 Motor External Fan .
Run AMA in par. 1-29 Automatic Motor Adaptation (AMA) .
VLT HVAC Low Harmonic Drive Operating In-
structions 9 Troubleshooting
MG.16.A1.02 - VLT
®
is a registered Danfoss trademark 173
9

Danfoss vlt FC 102 Specifications

General

Brand	Danfoss
Model	vlt FC 102
Category	DC Drives
Language	English