Troubleshooting; Warnings/Alarm Messages - Danfoss VLT FCD 302 Operating Instructions Manual

Troubleshooting

7 Troubleshooting

7.1.1 Warnings/Alarm Messages

A warning or an alarm appears as an LED signal on the
front of the frequency converter, and is indicated by a
code on the display.
A warning remains active until its cause is no longer
present. Under certain circumstances, the motor can still
continue to operate. Warning messages can be critical, but
are not necessarily so.
If there is an alarm, the frequency converter trips. Alarms
must be reset to restart operation once their cause has
been rectified.
Perform the reset in one of three ways:
1. By pressing [Reset] on the LCP.
2. Via a digital input with the "Reset" function.
3. Via serial communication/optional fieldbus.
NOTE
After a manual reset pressing [Reset] on the LCP, [Auto On]
must be pressed to restart the motor.
If an alarm cannot be reset, the reason may be that its
cause has not been rectified, or the alarm is trip-locked
(see also Table 7.1).
No. Description
1 10 Volts low
2 Live zero error
3 No motor
4 Mains phase loss
5 DC link voltage high
6 DC link voltage low
7 DC over-voltage
8 DC under voltage
9 Inverter overloaded
10 Motor ETR over temperature
11 Motor thermistor over temperature
12 Torque limit
13 Over Current
14 Earth Fault
15 Hardware mismatch
16 Short Circuit
17 Control word time-out
22 Hoist Mech. Brake
23 Internal Fan Fault
25 Brake resistor short-circuited
26 Brake resistor power limit
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VLT Decentral Drive FCD 302 Operating Instructions
Alarms that are trip-locked offer additional protection,
meaning that the mains supply must be switched off
before the alarm can be reset. After being switched back
on, the frequency converter is no longer blocked. Reset the
frequency converter as described above, once the cause of
the alarm has been rectified.
Alarms that are not trip-locked can also be reset using the
automatic reset function in 14-20 Reset Mode.
Automatic wake-up is possible.
When a warning and alarm are marked against a code in
Table 7.1, this means that either a warning occurs before
an alarm, or else that the user can specify whether a given
fault will trigger a warning or an alarm.
Example: 1-90 Motor Thermal Protection. After an alarm or
trip, the motor carries on coasting, and the alarm and
warning flash. Once the problem has been rectified, only
the alarm continues flashing until the frequency converter
is reset.
Warning Alarm/Trip
X
(X) (X)
(X)
(X) (X)
X
X
X X
X X
X X
(X) (X)
(X) (X)
X X
X X
X X
X
X
(X) (X)
(X) (X)
X
X
(X) (X)
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MG04F302 - VLT is a registered Danfoss trademark
WARNING
Alarm/Trip Lock Parameter Reference
6-01 Live Zero Timeout Function
1-80 Function at Stop
(X) 14-12 Function at Mains Imbalance
1-90 Motor Thermal Protection
1-90 Motor Thermal Protection
X
X
X
X
8-04 Control Word Timeout Function
Parameter group 2-2*
2-13 Brake Power Monitoring
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