7 Troubleshooting
A warning or an alarm is signalled by the relevant LED on the front of the frequency converter and indicated by a code on the
display.
A warning remains active until its cause is no longer present. Under certain circumstances operation of the motor may still be
continued. Warning messages may be critical, but are not necessarily so.
In the event of an alarm, the frequency converter will have tripped. Alarms must be reset to restart operation once their cause
has been rectified.
T
This may be done in three ways:
1.
By using the [RESET] control button on the LCP.
2.
Via a digital input with the “Reset” function.
3.
Via serial communication/optional fieldbus.
NOTE
After a manual reset using the [RESET] button on the LCP, the [AUTO ON] button 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 on
following page).
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 and may be reset as described above
once the cause has been rectified.
Alarms that are not trip-locked can also be reset using the automatic reset function in
14-20 Reset Mode
(Warning: automatic
wake-up is possible!)
If a warning and alarm is marked against a code in the table on the following page, this means that either a warning occurs
before an alarm, or else that you can specify whether it is a warning or an alarm that is to be displayed for a given fault.
This is possible, for instance, in
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.
No. Description
Warning
Alarm/Trip
Alarm/Trip Lock
Parameter Reference
1
10 Volts low
X
2
Live zero error
(X)
(X)
6-01 Live Zero Timeout Function
3
No motor
(X)
1-80 Function at Stop
4
Mains phase loss
(X)
(X)
(X)
14-12 Function at Mains Imbalance
5
DC link voltage high
X
6
DC link voltage low
X
7
DC over-voltage
X
X
8
DC under voltage
X
X
9
Inverter overloaded
X
X
10
Motor ETR over temperature
(X)
(X)
1-90 Motor Thermal Protection
11
Motor thermistor over temperature
(X)
(X)
1-90 Motor Thermal Protection
12
Torque limit
X
X
13
Over Current
X
X
X
14
Earth Fault
X
X
X
15
Hardware mismatch
X
X
Troubleshooting
VLT
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Decentral Drive FCD 302 Operating Instructions
MG.04.F2.02 - VLT
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is a registered Danfoss trademark
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