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NOTE: Each 10th minute, a new attempt is made to communicate in one
direction only. When all breaks are repaired (corrected), communication
automatically returns to communicate in one direction only.
FAULT: Detector removed zone xxx address xx
A wireless smoke detector 4611 has been removed from its base.
FAULT: Earth fault (minus), Control Unit xx
FAULT: Earth fault (plus), Control Unit xx
Earth fault is detected in control unit no. xx.
Main board 5010:
Earth voltage is normally around 11.5V when measured with 0 V (J2:2)
as reference.
0 V to earth < 3.4 V = Earth fault (minus).
•
•
0 V to earth > 18.3 V = Earth fault (plus).
Main board 5012:
+24 V to earth is normally 11.5 V. 0 V to earth is normally 12.5 V.
•
Voltage to earth < 3.0 V = Earth fault (minus)
Voltage to earth > 21.9 V = Earth fault (plus)
•
Check all cables (for damage, etc.). The function of the Control Unit
cannot be guaranteed. Call for service technician.
Note: When the earth fault is located on a COM-loop it can be
difficult to measure with a multi meter due to the fact that SA and
SB changes polarity during COM loop communication. However,
the FDCIE makes measurements at specific timings when the
polarity of SA and SB is known. In case of an earth fault on a COM-
loop it will be displayed as follows:
• Earth fault on the SA line will be displayed as Earth fault (minus)
• Earth fault on the SB line will be displayed as Earth fault (plus)
Disconnect the loops one by one to find out where the earth fault is.
FAULT: Earth fault, technical number xxxxxx
Check all cables (for damage, etc.) connected to the unit.
FAULT: Expansion board x, Control Unit xx
This is valid for the exp. boards 4580 & 4581, i.e. expansion board no.
x, mounted in the Control Unit no. xx.
There is an internal fault on the board, replace the board.
FAULT: Expansion board x, loop x, Control Unit xx
This is valid for the I/O Matrix board (4582) no. x, connected on COM
loop x (0-3) in the Control Unit no. xx.
There is some internal fault on the board, replace the board.
Note: In 19" rack systems, the 4582 circuit is incorporated in the new
fan / damper (1206/1211) and zone (1205) modules, in this case,
replace the module.
FAULT: External fuses, Control Unit xx
The fault is to be found in the external power supply equipment, which
has a fuse fault output connected to a programmable input in Control
Unit no. xx.
FAULT: External power supply, Control Unit xx
The fault is to be found in the external power supply equipment, which
has a fault output connected to a programmable input in CU xx.
75
Operation Manual
FT1020G3 Rev 2.10.4
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