Danfoss VLT Decentral FCD 300, Operating Instructions Manual

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4.1.2 Warnings/Alarm Messages
A warning or an alarm will appear in the LEDs on the LCP2. A warning will be shown until the fault has been corrected, while an alarm will continue to
flash until the [STOP/RESET] key is activated.The table shows the various warnings and alarms shown in the LCP2, and whether the fault locks the
frequency converter. After a
Trip locked (alarm and warning LEDs flash at the same time), the mains supply is cut off and the fault is corrected. The
mains supply is reconnected and the frequency converter is reset. The frequency converter is now ready. A Trip can be reset manually in three ways:
1. Via the operating key [STOP/RESET].
2. Via a digital input.
3. Via serial communication.
It is also possible to choose an automatic reset in parameter 405
Reset function
. When a cross appears in both warning and alarm, this can mean that
a warning comes before an alarm. It can also mean that it is possible for the user to programme whether a warning or an alarm will appear for a given
fault. For example, this is possible in parameter 128
Motor thermal protection
. After a trip the motor will coast, and alarm and warning will blink on the
frequency converter, but if the fault disappears only the alarm will blink. After a reset the frequency converter will be ready to start operation again.
No. Description Warning Alarm Trip
locked
2 Live zero error (LIVE ZERO ERROR) X X X
4 Mains phase loss (MAINS PHASE LOSS) X X X
5 Voltage warning high (DC LINK VOLTAGE HIGH) X
6 Voltage warning low (DC LINK VOLTAGE LOW) X
7 Overvoltage (DC LINK OVERVOLT) X X X
8 Undervoltage (DC LINK UNDERVOLT) X X X
9 Inverter overload (INVERTER TIME) X X
10 Motor overloaded ( MOTOR, TIME) X X
11 Motor thermistor (MOTOR THERMISTOR) X X
12 Current limit (CURRENT LIMIT) X X
13 Overcurrent (OVERCURRENT) X X X
14 Earth fault (EARTH FAULT) X X
15 Switch mode fault (SWITCH MODE FAULT) X X
16 Short-circuit (CURR. SHORT CIRCUIT) X X
17 Serial communication timeout (STD BUS TIMEOUT) X X
18 HPFB bus timeout (HPFB TIMEOUT) X X
33 Out of frequency range (OUT FREQ RNG/ROT LIM) X
34 HPFB communication fault (PROFIBUS OPT. FAULT) X X
35 Inrush fault (INRUSH FAULT) X X
36 Overtemperature (OVERTEMPERATURE) X X
37-45 Internal fault (INTERNAL FAULT) X X
50 AMT not possible X
51 AMT fault re. nameplate data (AMT TYPE.DATA FAULT) X
54 AMT wrong motor (AMT WRONG MOTOR) X
55 AMT timeout (AMT TIMEOUT) X
56 AMT warning during AMT (AMT WARN. DURING AMT) X
99 Locked (LOCKED) X
LED indication
Warning yellow
Alarm red
Trip locked yellow and red
WARNING/ALARM 2: Live zero fault
The voltage or current signal on terminal 53 or 60 is below 50% of the
preset value in parameter 309 or 315
Terminal, min. scaling
.
WARNING/ALARM 4: Mains phase fault
No phase on mains supply side. Check the supply voltage to the frequency
converter. This fault is only active in 3-phase mains supply. The alarm
can only occur when the load is pulsing. In this instance the pulses must
be dampened, e.g. using an inertia disc.
WARNING 5: Voltage warning high
If the intermediate circuit voltage (UDC) is higher than Voltage warning
high the frequency converter will give a warning and the motor will con-
tinue to run unchanged. If the UDC remains above the voltage warning
limit, the inverter will trip after a set time. The time depends on the de-
vice, and is set at 5 - 10 sec. Note: The frequency converter will trip with
an alarm 7 (overvoltage). A voltage warning can occur when the con-
nected mains voltage is too high. Check whether the supply voltage is
suitable for the frequency converter, see
Technical data
. A voltage warn-
ing can also occur if the motor frequency is reduced too quickly due to
ramp down time being too short.
WARNING 6: Voltage warning low
If the intermediate circuit voltage (UDC) is lower than
Voltage warning
low
the frequency converter will give a warning and the motor will con-
tinue to run unchanged. If the UDC remains below the voltage warning
limit, the inverter will trip after a set time. The time depends on the de-
vice, and is set at 2 - 25 sec. Note: The frequency converter will trip with
an alarm 5 (undervoltage). A voltage warning can occur when the con-
nected mains voltage is too low. Check whether the supply voltage is
suitable for the frequency converter, see
Technical data . When the fre-
quency converter is switched off a brief warning 6 (and warning 8)
appears.
WARNING/ALARM 7: Overvoltage
If the intermediate voltage (UDC) goes over the inverter's
Overvoltage
limit
the inverter will be switched off until the UDC has once more fallen
below the overvoltage limit. If the UDC remains above the overvoltag limit
the inverter will trip after a set time. The time depends on the device,
VLT® Decentral FCD 4 All about FCD 300
MG.04.B8.02 - VLT is a registered Danfoss trademark
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