List Of Warnings And Alarms - Danfoss VLT CDS 803 Programming Manual

Troubleshooting

4.5 List of Warnings and Alarms

WARNING/ALARM 2, Live zero error
This warning or alarm only appears if programmed by the
user in parameter 6-01 Live Zero Timeout Function. The
signal on 1 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.
•
Check that the frequency converter programming
matches the analog signal type.
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 parameter 14-12 Response to
Mains Imbalance.
Troubleshooting
•
Check the supply voltage and supply currents to
the frequency converter.
WARNING/ALARM 7, DC overvoltage
If the DC-link voltage exceeds the limit, the frequency
converter trips after a time.
Troubleshooting
•
Extend the ramp time.
•
Activate functions in parameter 2-10 Brake
Function.
WARNING/ALARM 8, DC under voltage
If the DC-link voltage (DC) drops below the undervoltage
limit, 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 an input voltage 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
90% 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
•
Compare the output current shown on the LCP
with the frequency converter rated current.
•
Compare the output current shown on the LCP
with measured compressor current.
MG18P202
Programming Guide
•
NOTICE
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
compressor is too hot. Select whether the frequency
converter gives a warning or an alarm when the counter
reaches 100% in parameter 1-90 Motor Thermal Protection.
The fault is that the compressor is overloaded by more
than 100% for too long.
Troubleshooting
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WARNING/ALARM 11, Motor thermistor over temp
The thermistor or the thermistor connection is discon-
nected. Select whether the frequency converter gives a
warning or an alarm in parameter 1-90 Motor Thermal
Protection.
Troubleshooting
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WARNING/ALARM 13, Over current
The inverter peak current limit is exceeded. The warning
lasts about 1.5 s, then the frequency converter trips and
issues an alarm.
Troubleshooting
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Danfoss A/S © 06/2019 All rights reserved.
Show the thermal drive load on the LCP and
monitor the value. When running above the
frequency converter continuous current rating,
the counter should increase. When running below
the frequency converter continuous current
rating, the counter should decrease.
Check if compressor is overheating.
Check if the compressor is mechanically
overloaded.
Check that the compressor parameter 1-24 Motor
Current is set correctly.
Check that compressor data in parameters 1-20
through 1-25 are set correctly.
Run AMA in parameter 1-29 Automatic Motor
Adaption (AMA).
Check if compressor is overheating.
Check if the compressor is mechanically
overloaded.
Check that the thermistor is connected correctly.
If using a thermal switch or thermistor, check the
programming of parameter 1-93 Thermistor Source
matches sensor wiring.
This fault may be caused by shock loading or fast
acceleration with high inertia loads.
Turn off the frequency converter. Check if the
compressor shaft can be turned.
Check that the compressor size matches the
frequency converter.
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