117 of 222 pages
Operating and service manual
501
FC local control
Alarm
Description
FC setting in Local Mode
Cause
Indication of FC set in the local control mode
Trouble
shooting
Possible causes:
•
Cable FC-com periodically defective.
•
Internal fault in the FC.
•
Defect FC.
Accompanied alarms:
•
One or more AL 5XX may also be active.
Trouble shooting:
1. Check that the cable FC-com is connected and not damaged.
2. Switch off the unit and wait 10 min. before switching on the unit again.
3. 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 Operations
p.50
Criteria
FC in the local mode
Controller
action
Mcond, Mevap1 and Mevap2 fan motors forced to low speed
Log
X
Alarm
X
Alarm light
Slow flash
Consequence
Unit stop
Elimination
Alarm will be marked as inactive in alarm list when local mode is reset on frequency
converter. Alarm may then be deleted.
Log data
Parm 1
Parm 2
Parm 3
Parm 4
Parm 5
Active/Inactive
508
FC short circ
Alarm
Description
FC Short Circuit Alarm
Cause
Indication of defective “cable”, compressor motor or FC
Trouble
shooting
(A16)
Possible causes:
•
Short-circuit on the FC power output.
•
Damaged cable and/or plugs.
Accompanied alarms:
•
One or more AL 5XX may also be active.
Trouble shooting:
1) There is a short-circuit on the compressor motor (Mcpr) terminals or in the
motor. Check the cable and replace if it is defect.
2) 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
Short circuit in compressor or its terminals. Motor current has been above 40 Amp
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, and can then be deleted.
Log data
Parm 1
Parm 2
Parm 3
Parm 4
Parm 5
Active/Inactive Freq FC
I FC