Nibe F1345 Service Manual page 43

Alarm 73-95 - perm. com. error accessory card
Is the dip-switch (AA5-S2)
correctly set for the accessory?
YES
Are the communications cables
correctly connected:
- between terminal block - AA2-X6
(F1345 without 2.0) or AA101-X10
(F1345 with 2.0) and the
accessory board (AA5-X4) (does
not apply to alarm 79)
- to following accessory board (if
connected)
- between the base board
(AA2-X6) or (AA101-X10) and the
accessory board (AA5-XJ6)
YES
Check the accessory card:
- Is power lit green?
- Does com flash once/sec?
YES
Replace the accessory card
(AA5).
Has the fault been corrected?
NO
Replace the display card (AA4).
F1345
NO
Action.
NO Action.
Check and rectify:
- that the voltage supply is on
terminal block AA5-X1 and that it
is correctly connected.
NO
- that the fine-wire fuse AA5-F1 is
complete.
- that miniature circuit-breaker FA1
has not tripped.
OK.
YES
Chapter 6 | Troubleshooting 43