Operating and service manual
118 of 222 pages
509
FC 24 V fault
Alarm
Description
FC Internal 24 V Supply Fault Alarm
Cause
Indication of problems with FC
Trouble
shooting
(A15)
Possible causes:
•
Internal fault in the FC.
Accompanied alarms:
•
One or more AL 5XX may also be active.
Trouble shooting:
1) Switch off the unit and wait 10 min. before switching on the unit again.
2) If the alarm is then still active, the FC is defective and must be replaced.
If there is no FC replacement available, the unit can be rewired for emergency
operation: See “Emergency Operation” p. 50
Criteria
Internal 24 V supply error
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
510
FC earth fault
Alarm
Description
FC Earth Fault Alarm
Cause
Indication of problems with cable, compressor or FC
Trouble
shooting
(A14)
Possible causes:
•
Isolation damaged on the FC power output to the compressor.
•
Defect FC.
•
Damaged cable and/or plugs.
Accompanied alarms:
•
One or more AL 5XX may also be active.
Trouble shooting:
1) The power cable for the compressor motor (Mcpr) may have defect isolation.
Check the cable and replace if it is defect.
2) Measure resistance fase to ground (must be above 2 M
W
).
3) The FC is defective and must be replaced.
If there is no FC replacement available, the unit can be rewired for emergency
operation: See “Emergency Operation” p. 50
Criteria
Leakage current from outlets to ground of FC. Current 3 A for more than
10 µsec
(0.00001 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