123 of 222 pages
Operating and service manual
517
FC over temp
Alarm
Description
FC Overtemperature Fault Alarm
Cause
Indication of problems with compressor or FC
Trouble
shooting
(A36)
Possible causes:
•
FC operates at operating limits.
•
Insufficient cooling for the FC.
•
Defect FC.
Accompanied alarms:
•
AL 522.
Trouble shooting:
1. The FC is getting too hot. Verify that supply voltage is not too high.
2. Check that the FC is mounted and tightened correctly to the compressor. If
the FC is mounted correctly, it should not be possible to insert an air gap
gauge between FC and compressor.
3. Motor cable between FC and compressor may be jammed between FC and
compressor. Cooling of FC is unsufficient. If this alarm appears more than
once: Dismount FC and check motor cable before mounting the FC again.
Fasten bolts properly for better cooling.
If no FC replacement is available, the unit can be rewired for emergency
operation: See “Emergency Operation” p. 50
Criteria
FC temperature e85°C (185°F), or above 78°C (172°F) for more than 15 min.
Controller
action
FC shut-down
Log
X
Alarm
X
Alarm light
Slow flash
Consequence
Unit stops and restarts when FC has cooled down
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