Fault Messages - Danfoss VLT Refrigeration Drive FC 103 Programming Manual

Troubleshooting

5.1.5 Fault Messages

WARNING 1, 10 Volts low
The 10 V voltage from terminal 50 on the control card is
below 10 V.
Remove some of the load from terminal 50, as the 10 V
supply is overloaded. Maximum 15 mA or minimum 590 Ω.
WARNING/ALARM 2, Live zero error
The signal on terminal 53 or 54 is less than 50% of the
value set in parameter 6-10 Terminal 53 Low Voltage,
parameter 6-12 Terminal 53 Low Current,
parameter 6-20 Terminal 54 Low Voltage, or
parameter 6-22 Terminal 54 Low Current.
WARNING/ALARM 3, No motor
No motor has been connected to the output of the
frequency converter.
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 in case of a fault in the input
rectifier on the frequency converter.
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
overvoltage limit of the control system. The frequency
converter is still active.
WARNING 6, DC link voltage low
The intermediate circuit voltage (DC) is below the
undervoltage limit of the control system. The frequency
converter is still active.
WARNING/ALARM 7, DC over voltage
If the intermediate circuit voltage exceeds the limit, the
frequency converter trips after a time.
Troubleshooting:
•
Select [2] Enable in parameter 2-17 Over-voltage
Control.
•
Extend the ramp time.
•
Activate functions in parameter 2-10 Brake
Function.
•
Increase parameter 14-26 Trip Delay at Inverter
Fault.
Selecting OVC function extends the ramp times.
MG16H202
Programming Guide
FC 103
Undervoltage
Voltage warning low
Voltage warning high
(without/with brake)
Overvoltage
The voltages stated are the intermediate circuit voltage of the
frequency converter with a tolerance of ±5 %. The corresponding
mains voltage is the intermediate circuit voltage (DC-link)
divided by 1.35
Table 5.11 Alarm/Warning Limits
WARNING/ALARM 8, DC under voltage
If the intermediate circuit voltage (DC) drops below the
voltage warning low limit (see Table 5.11), the frequency
converter checks if 24 V back-up supply is connected.
If no 24 V backup supply is connected, the frequency
converter trips after a given time depending on the unit.
To check whether the supply voltage matches the
frequency converter, see General Specifications in the VLT
Refrigeration Drive FC 103 Design Guide.
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 nominal current for too long.
WARNING/ALARM 10, Motor ETR over temperature
According to the electronic thermal protection (ETR), the
motor is too hot. Select if the frequency converter issues a
warning or an alarm when the counter reaches 100% in
parameter 1-90 Motor Thermal Protection. The fault is that
the motor is overloaded by more than nominal current for
too long. Check that parameter 1-24 Motor Current is set
correctly.
WARNING/ALARM 11, Motor thermistor over temp
The thermistor or the thermistor connection is discon-
nected. Select if the frequency converter issues a warning
or an alarm in parameter 1-90 Motor Thermal Protection.
Check that the thermistor is connected correctly between
terminal 53 or 54 (analog voltage input) and terminal 50
(+ 10 V supply), or between terminal 18 or 19 (digital input
PNP only) and terminal 50. If a KTY sensor is used, check
for correct connection between terminal 54 and 55.
WARNING/ALARM 12, Torque limit
The torque is higher than the value in
parameter 4-16 Torque Limit Motor Mode (in motor
operation) or the torque is higher than the value in
parameter 4-17 Torque Limit Generator Mode (in
regenerative operation).
Danfoss A/S © 05/2016 All rights reserved.
3x200–240 V AC 3x380–500 V AC
[V DC] [V DC]
185 373
205 410
390/405 810/840
410 855
5 5
®
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