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Operation Manual
FT128 Rev 2.4
FAULT: Fan on loop unit addr xxx
The LED "Fault" is lit on a fan control module connected to a COM loop, fan no.
xx which controlled by I/O unit 3361 with the technical address xxx. The fault
indicates that the fan has changed the status (run to stop or stop to run) but the
corresponding I/O unit 3361 input has not been activated within 30 seconds.
Check the fan pressure switch and the cables / connections.
FAULT: Fault warning routing equipment
The fault is to be found in the Fault warning routing equipment. A fault output is
connected to a programmable input in the FT128 system. Check the input as well.
FAULT: FB Silence switch active
Only valid for the New Zealand convention.
New Zealand FB Silence switch ("outside switch") is turned ON, i.e. from not
activated to activated state.
FAULT: FBP x,
FBP=1826 (Ext. Fire Brigade Panel)
The ext. FBP is programmed as another type in the SSD or a fault in the unit
FAULT: Fuse on COM-loop
Fuse F4 on the main board is blown. The fuse is not replaceable.
Note: The fuse should not be replaced. The main board 4556 has to be
replaced, since more components are broken as well.
FAULT: High current consumption in CU
FT128 current consumption > 1.8 A, this will cause the battery charging turn off.
The battery charging is turned off as long as the current consumption exceeds
0.75 A. Normally this fault only appears when starting up / expanding an FT128.
When starting up the control unit or when the COM-loop is reconnected, the loop
current in normal condition is measured and stored.
FAULT: High current on COM-loop
If the stored value is below 100 mA, this fault will later be generated for a
measured current higher than the stored value plus 20mA. (One example: 75 mA
(stored) + 20mA = 95 mA = fault limit.)
If the stored value is over 100 mA, this fault will later be generated for a measured
current higher than the stored value plus 20%.
(One example: 150 mA (stored) + 20% = 180 mA = fault limit.)
Note: This fault is not checked in alarm condition.
The reason could be not "full" short circuit on the COM loop but very close to short
circuit, e.g. due to moisture / corrosion / bad contact. Check connections etc.
FAULT: Input
A fault on the supervised input I
in FT128.
0
Check the cables / connections (open or short circuit).
65
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