ABB ACS800 Series Firmware Manual page 182

170
Fault Cause
DC UNDERVOLT Intermediate circuit DC voltage is not sufficient
due to missing mains phase, blown fuse or
(3220)
rectifier bridge internal fault.
02.19 FW 2 bit 02
DC undervoltage trip limit is 0.6 · U
U
1min
range. For:
400 V and 500 V units, U
690 V units, U
Actual voltage in intermediate circuit
corresponding to mains voltage trip level is:
307 VDC for 400 V and 500 V units, and
425 VDC for 690 V units.
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
02.19 FW 2 bit 05
GD DISABLED AGPS power supply of parallel connected R8i
inverter module has been switched off during
(FF53)
run. X (1...12) refers to inverter module
number.
GROUND FAULT Drive has detected load unbalance typically
due to ground fault in motor or motor cable.
(2330)
02.18 FW 1 bit 4
(programmable
Fault Function
30.17)
ID RUN FAIL Motor ID Run is not completed successfully.
(FF84)
IN CHOKE TEMP Excessive input choke temperature
(FF81)
INT CONFIG Number of inverter modules is not equal to
original number of inverters.
(5410)
INV DISABLED Optional DC switch has opened while unit was
running or start command was given.
(3200)
Fault tracing
is minimum value of mains voltage
is 380 V
1min
is 525 V.
1min
What to Do
Check mains supply and fuses.
, where
1min
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 Prevention of Unexpected Start-up
circuit.
Replace AGPS board of R8i inverter module.
Check there are no power factor correction
capacitors or surge absorbers in motor cable.
Check that there is no ground fault in motor or
motor cables: measure insulation resistances
of motor and motor cable.
If no ground fault can be detected, contact your
local ABB representative.
Check maximum speed (parameter 20.02). It
should be at least 80% of motor nominal speed
(parameter 99.08).
Stop drive. Let it cool down.
Check ambient temperature.
Check that fan rotates in correct direction and
air flows freely.
Check status of inverters. See
FAULT INFO.
Check fibre optic cables between APBU and
inverter modules.
Close DC switch.
Check AFSC-0x Fuse Switch Controller unit.
50 PULSE ENCODER
02.02 INT