ABB ACS800 Firmware Manual page 290

290
FAULT CAUSE
DC OVERVOLT Excessive intermediate circuit DC voltage.
DC overvoltage trip limit is 1.3 · U
(3210)
U
3.05 FW 1 bit 2
range. For 400 V units, U
500 V units, U
intermediate circuit corresponding to mains
voltage trip level is 728 V DC for 400 V units
and 877 V DC for 500 V units.
DC UNDERVOLT Intermediate circuit DC voltage is not sufficient
due to missing mains phase, blown fuse or
(3220)
rectifier bridge internal fault.
3.06 FW 2 bit 2
DC undervoltage trip limit is 0.6 · U
U
range. For 400 V and 500 V units, U
380 V. For 690 V units, U
voltage in intermediate circuit corresponding to
mains voltage trip level is 307 V DC for 400 V
and 500 V units, and 425 V DC for 690 V units.
EARTH FAULT Drive has detected load unbalance typically
due to earth fault in motor or motor cable.
(2330)
3.05 FW 1 bit 4
(programmable
Fault Function
30.17)
ENCODER A<>B Pulse encoder phasing is wrong: Phase A is
connected to terminal of phase B and vice
(7302)
versa.
ENCODER ERR Communication fault between pulse encoder
and pulse encoder interface module and
(7301)
between module and drive
3.06 FW 2 bit 5
EXTERNAL FLT Fault in external device. (This information is
configured through one of programmable
(9000)
digital inputs.)
3.06 FW 2 bit 8
(programmable
Fault Function
30.03)
FAN OVERTEMP Excessive temperature of drive output filter fan.
Supervision is in use in step-up drives.
(FF83)
FORCED TRIP Generic Drive Communication Profile trip
command
(FF8F)
Fault tracing
is maximum value of mains voltage
1max
1max
is 500 V. Actual voltage in
1max
is minimum value of mains voltage
1min
1min
WHAT TO DO
Check that overvoltage controller is on
where (parameter 20.05).
1max,
Check mains for static or transient overvoltage.
is 415 V. For
Check brake chopper and resistor (if used).
Check deceleration time.
Use coast-to-stop function (if applicable).
Retrofit frequency converter with brake
chopper and brake resistor.
Check mains supply and fuses.
, where
1min
is
1min
is 525 V. Actual
Check there are no power factor correction
capacitors or surge absorbers in motor cable.
Check that there is no earth fault in motor or
motor cables:
- measure insulation resistances of motor and
motor cable.
If no earth fault can be detected, contact your
local ABB representative.
Interchange connection of pulse encoder
phases A and B.
Check pulse encoder and its wiring, pulse
encoder interface module and its wiring and
parameter group
settings.
Check external devices for faults.
Check parameter
Stop drive. Let it cool down.
Check ambient temperature.
Check fan rotates in correct direction and air
flows freely.
See appropriate communication module
manual.
50 ENCODER MODULE
30.03 EXTERNAL FAULT.