Troubleshooting - Danfoss VLT FC 100 Series Programming Manual

Troubleshooting

4 Troubleshooting
4.1 Troubleshooting
A warning or an alarm is signaled by the relevant LED on
the front of the Adjustable frequency drive 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 Adjustable frequency drive
will have tripped. Alarms must be reset to restart operation
once their cause has been rectified.
This may be done in four 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 serial
communication bus.
4. By resetting automatically using the [Auto Reset]
function, which is a default setting for VLT
Drive, see 14-20 Reset Mode in the FC 100
Programming Guide MGxxyy
NOTE!
After a manual reset using the [RESET] button on the LCP,
the [Auto On] or [Hand On] button must be pressed to
restart the motor.
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 overvoltage
8 DC undervoltage
9 Inverter overloaded
10 Motor ETR overtemperature
11 Motor thermistor over temperature
12 Torque limit
13 Overcurrent
14 Earth fault
15 Hardware mismatch
®
VLT HVAC Drive Programming Guide
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 4.1).
Alarms that are trip-locked offer additional protection,
means that the line power supply must be switched off
before the alarm can be reset. After being switched back
on, the Adjustable frequency drive 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 it can be specified
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 on the
Adjustable frequency drive. Once the problem has been
rectified, only the alarm continues flashing.
®
HVAC
NOTE!
No missing motor phase detection (no 30-32) and no stall
detection is active when 1-10 Motor Construction is set to
[1] PM non-salient SPM.
Warning
X
(X)
(X)
(X)
X
X
X
X
X
(X)
(X)
X
X
X
MG11CD22 - VLT ® is a registered Danfoss trademark
CAUTION
Alarm/ Alarm/Trip Lock
Trip
(X)
(X) (X)
X
X
X
(X)
(X)
X
X X
X X
X X
4
Parameter Reference
6-01
1-80
14-12
1-90
1-90
4-1
4