
Operating and service manual
128 of 222 pages
524
FC current limit
Warning
Description
FC Current Limit Fault Warning
Cause
Indication of problems with compressor. Error may be seen during pull-down
Trouble
shooting
(A12)
Possible causes:
•
The compressor motor draws too much current.
•
Defect FC.
Accompanied alarms:
•
One or more AL 5XX may also be active. Check these alarms also before
replacing anything.
Trouble shooting:
1. The compressor motor draws too much current from the FC. The motor may
be jammed or defect.
2. Turn off unit and wait 10 min. before turning the unit on again.
3. When the unit starts up again, verify that the compressor starts again and is
running.
4. If the compressor cannot run or runs very shortly before this alarm appears
again, the compressor is defective and must be replaced.
5. If the compressor can run several min. without alarm, the FC may be
defective and must be replaced if the alarm appears again.
If no FC replacement is available, the unit can be rewired for emergency
operation: See “Emergency Operation” p. 50
Criteria
Motor current above 24 Amp for approx. 10 sec
Controller
action
None
Log
X
Alarm
X
Alarm light
Off
Consequence
If not solved, this problem can cause FC to stop due to alarm 511
Elimination
Warning will be marked as inactive in alarm list when reset by FC. Alarm may then be
deleted.
Log data
Parm 1
Parm 2
Parm 3
Parm 4
Parm 5
Active/Inactive Freq FC
I FC
Psuc
Pdis