ABB ACH550-VCR - Page 574

2-228 ACH550 E-Clipse Bypass User’s Manual
Diagnostics
3020 PHASE SEQ Sequence of 3 phase
voltage input is such
that bypass operation
will result in motor
rotation opposite of
drive forward
operation.
Phase sequence
unknown at time of
wiring
Swap any two of the
three input wires to the
bypass unit
3021 PH A CURR FBK Fault is generated
when current in Phase
A is detected and the
bypass contactor is
open
Loose CT connection
Bad RBCU
Bad CT
Check J2 connector
for proper seating
Check connector on
Current Assembly
Replace RBCU
Replace RCSA unit
3022 PH C CURR FBK Fault is generated
when current in Phase
C is detected and the
bypass contactor is
open
Loose CT connection
Bad RBCU
Bad CT
Check J2 connector
for proper seating
Check connector on
Current Assembly
Replace RBCU
Replace RCSA unit
3023 BYP COIL
SHORTED
Coil characteristics
are checked only on
power up and coil
current is greater than
allowable values
Shorted contactor coil
Shorted/damaged
cable
Bad RBCU
Replace RBCU
Replace RCSA unit
3024 DRV COIL
SHORTED
Coil characteristics
are checked only on
power up and coil
current is greater than
allowable values
Shorted contactor coil
Shorted/damaged
cable
Bad RBCU
Replace RBCU
Replace RCSA unit
3027 INVALID SUB
ASM
Contactor assembly
as recorded in the
RBCU unit does not
match drive
information
communicated via 485
link
RBCU unit from a
different size bypass
used to replace a
defective RBCU.
Parameters not
matched after
Firmware change.
Contact ABB at
1-800-HELP-365
Option 4
3028 EXT COMM LOSS Time between fieldbus
messages has
exceeded timeout
interval set with
parameter 3005
Incorrect
Communication
settings in Group 51 &
53.
Poor Connections
Noise on
Communication Line
Check Group 51 & 53
Tighten Connections
Check
Communication Cable
Grounding
3029 EFB CONFIG
FILE
Error reading
configuration file for
embedded fieldbus
Internal Startup error Cycle Power
Replace RBCU
3030 FORCE TRIP Fault trip forced by
external fieldbus
Overriding Control
System tripped
E-Clipse unit via
fieldbus.
Check Overriding
Control System
Fault
Code
Fault Name In
Panel
Fault Possible Cause Corrective Action