382
Diagnostics and maintenance
ACH550-01 User's Manual
2003
UNDERVOLTAGE
The undervoltage controller is active. Check for
and correct:
•
undervoltage on mains.
2004
DIR
LOCK
The change in direction being attempted is not
allowed. Either:
•
do not attempt to change the direction of motor
rotation, or
•
change parameter 1003
DIRECTION
to allow
direction change (if reverse operation is safe).
2005
IO
COMM
Fieldbus communication has timed out. Check for
and correct:
•
fault setup (3018
COMM
FAULT
FUNC
and 3019
COMM
FAULT
TIME
)
•
communication settings (
Group 51: EXT COMM
MODULE
or
Group 53: EFB PROTOCOL
as
appropriate)
•
poor connections and/or noise on line.
2006
AI
1
LOSS
Analogue input 1 is lost, or value is less than the
minimum setting. Check:
•
input source and connections
•
parameter that sets the minimum (3021)
•
parameter that sets the alarm/fault operation
(3001).
2007
AI
2
LOSS
Analogue input 2 is lost, or value is less than the
minimum setting. Check:
•
input source and connections
•
parameter that sets the minimum (3022)
•
parameter that sets the alarm/fault operation
(3001).
Alarm
code
Display
Description
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