EBL512 G3 V. 3.0.X
- FIRE ALARM SOLUTIONS OPERATING INSTRUCTIONS
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FAULT: Cut-off tech addr nnn <-> nnn [sup-loop x], loop x, CU xx
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.
Tech addr nnn <-> nnn describes between which Short Circuit Isolators the cut-off is located.
n = Technical address of the unit with short circuit isolator. A & B is the built-in isolator in the
EBL512 G3 A-direction and B-direction respectively.
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). There will also be a "FAULT: No reply ….." message for each unit that EBL512 G3 cannot find and "FAULT: Multiple
faults …".
Each 10th minute a new attempt is made to communicate in one direction only.
When all breaks are repaired (corrected) the 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 or the door on a wireless manual call point 4614 has been
opened.
FAULT: Display units mixed on channels (Primary/Secondary), CU xx
The primary and secondary channels to the display units connected in control unit xx have been mixed. Check cables and con
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nections.
FAULT: Earth fault (minus),
control unit xx
FAULT: Earth fault (plus),
control unit xx
Earth fault is detected in control unit no. xx.
+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)
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 c.i.e. makes measure
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ments 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.
Check all cables (for damage, etc.). The function of the control unit cannot be guaranteed. Call for service personnel / engineer.
