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Battery voltage is too low (< 2.8 V)
The batteries (2 x 3 V Lithium) must be replaced.
FAULT: Cables mixed COM-loop
The two wires L (SA) and C (SB) have been mixed (swapped). Check that the wire
connections are correct (according to drawing F666).
FAULT: Charging external power supply
A fault exists in external power supply equipment. A fault output from the external
equipment is connected to a programmable input in the FT128 system. Check
the input as well.
FAULT: Charging, techn addr xxx
Valid for an external power supply 3366 connected on the COM loop.
The battery charging function is not working properly. The charger board may
need to be replaced.
FAULT: Checksum system program
A fault in FT128 S/W. This is very serious. Requires system software download.
Call for service personnel / engineer immediately.
FAULT: Cut-off SCI nn <-> SCI nn
This fault is indicating a cut-off (break) on the loop or that the COM loop voltage
is too low at the end of the loop (i.e. < 12
SCI n <->SCI n
off is located.
n = A, B, 0, 1, 2, 3, 4, 5, 6 or up to 127. A & B are the built-in isolators in the
FT128 A-direction and B-direction respectively, i.e. if no SCI is used the
information will always be:
If only one SCI e.g. 4313 no. 0 is used, the information will be:
SCI A <-> SCI 0
...and so on.
If the break is a single break (cut-off) on the loop, no other fault messages will be
reported.
If the loop has several breaks, the message reports the last isolator before the
break in the A-direction (including the following isolator). There will also be a
"FAULT: No reply ....." message for each unit that FT128 cannot find and "FAULT:
Several faults ...".
NOTE: Each 10
direction only.
When all breaks are repaired (corrected), the communication automatically
returns to communicate in the A-direction only.
FAULT: Detector removed zz-aa
to see the technical address.
Press
50
The fault has to be acknowledged and it can last up to 10 minutes before the communication returns to
communicate in the A-direction only.
describes between which Short Circuit Isolators (SCI:s) the cut-
SCI A <-> SCI
or
SCI 0 <-> SCI B
th
minute a new attempt is made to communicate in the A-
63
V
).
DC
B.
50
Operation Manual
FT128 Rev 2.4
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