Operation Manual
FT1020G3 Rev 2.4
63
FAULT: Battery zone xxx address xx
Valid for the wireless smoke detector 4611. The battery voltage is
< 2.8 V. The batteries have to be replaced.
FAULT: Charger, Control Unit xx
The battery charging function is not OK. The main board 5010 may have
be replaced.
FAULT: Charging external power supply, Control Unit xx
The fault is to be found in the external power supply equipment, which
has a charging fault output connected to a programmable input in
FAULT: Charging output unit xxxxxx
The fault is to be found in the external power supply unit 3366 or 4466.
Charging is stopped due to too high output current.
FAULT: Checksum MMI program, Control Unit xx
A fault in the Control Unit xx MMI board 5011 software. LED "System
fault" is turned on. This is a very serious fault. Call for service
personnel/engineer immediately.
FAULT: Checksum system program, Control Unit xx
A fault in the Control Unit xx Main board 5010 software. LED "System
fault" is turned on. This is a very serious fault. Call for service
personnel/engineer immediately.
FAULT: Control unit xx has no contact
with Control Unit xx, network x
network x = network 0 or network 1
Network 0: In a redundant network, the communication is normally on
Network 0 only.
Network 1: In a redundant network, Network 1 is normally in a
supervised quiescent state until there is a fault (cut-off or short circuit)
on Network 0.
• Check the TLON network cables / connections. (Also for mixed
Network 0 and Network 1 cables.)
• Faulty TLON connection board 1590 / 5090.
• The Control Unit has no power.
• Can be shown in conjunction with new S/W download.
FAULT: Cut-off loop x, Control Unit xx
SCI nn <-> SCI nn
This fault is indicating a cut-off (break) on COM loop x or the COM loop
voltage is too low at the end of the loop.
SCI n <->SCI n describes between which Short Circuit Isolators the
cut-off is located.
n = A, B, 0, 1, 2, 3, 4, 5, 6 .....127. A & B is the built-in isolator in the
FT1020G3 A-direction and B-direction respectively.
If no SCI is used, the information will always be: SCI A <-> SCI B.
If only one SCI is used (e.g. 4313 no. 0), the information will be:
SCI A <-> SCI 0 or SCI 0 <-> SCI B
...and so on.
If it is a single break (cut-off) on the loop, there will be no other fault
messages.
If there are several breaks on the loop the message shows the last
isolator before the break in the A-direction (incl. the following isolator).
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