Panasonic EBL512 Operating Instructions Manual page 52

Panasonic Electric Works Fire & Security Technology Europe AB
MEW00748 Rev: 1 Operating Instructions Fire alarm system EBL512 V2.3.x
FAULT:Cut-off loop x, CU xx,ASF 2<->CU
FAULT:Cut-off loop x, CU xx,ASF 1<->CU
FAULT:Cut-off loop x, CU xx,ASF 0<->CU
This is indicating a single break on the COM loop "x" when one or
more short circuit isolators 2370, ASF, are connected on the loop.
Communication has to be performed in both directions, to find all
units. The break is to be found in the specified segment (e.g. ASF
3<->CU = between short circuit isolator no. 3 and the control unit).
th
Each 10 minute is an attempt to comm. in one direction made again.
FAULT: Display unit xxxxxx
Display unit out of work. Fault in the display unit EEPROM ("site
specific data"). Download the data again or change the EEPROM and
download the data again.
FAULT: Double addresses techn. no.: xxxxxx
Two (or more) units, connected to a BS4 loop (1584 board), have been
given the same address. Check the units.
FAULT: Earth fault (plus), CU xx
FAULT: Earth fault (minus), CU xx
Earth fault is detected.
+24 V to earth is normally 12.5 V. 0 V to earth is normally 11.5 V.
Voltage to earth < 3.4 V = Earth fault (minus).
Voltage to earth > 18.3 V = Earth fault (plus).
Check all cables (for damage, etc.). The function of the control unit
can not be guaranteed. Call for service personnel/engineer.
FAULT: Earth fault, output unit xxxxxx
Check all cables connected to the output unit.
FAULT: EPU xx, 1587-board x, CU xx
EPU=1728
The unit is programmed as another type of unit than the SSD says or
fault in the unit.
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System voltage is normally 24 V DC.