
119 of 222 pages
Operating and service manual
511
FC over cur
Alarm
Description
FC Overcurrent Alarm
Cause
Indication of problems with compressor
Trouble
shooting
(A13)
Possible causes:
•
The compressor motor draws too much current.
•
Defect FC.
•
Condenser blocked due to dirt and residue.
Accompanied alarms:
•
One or more AL 5XX may also be active. Check also these alarms 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 on the unit 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 short time before this alarm
comes 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 comes again. If there is no FC
replacement available, the unit can be rewired for emergency operation: See
Emergency Operations
p.50
6) Clean condenser.
Criteria
FC overloaded. Current above 38 Amp for approx. 1 sec
Controller
action
FC shut-down
Log
X
Alarm
X
Alarm light
Slow flash
Consequence
Unit stop
Elimination
Alarm 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
512
FC motor therm
Alarm
Description
FC- Compressor Motor Overtemperature
Cause
Indication of defective compressor or lack of oil
Trouble
shooting
(A11)
This alarm is not used at the moment
Criteria
Over temperature in compressor motor
Controller
action
FC shut-down
Log
X
Alarm
X
Alarm light
Slow flash
Consequence
Unit stop
Elimination
Alarm 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