Panasonic EBL512 Operating Instructions Manual page 55

Panasonic Electric Works Fire & Security Technology Europe AB
MEW00748 Rev: 1 Operating Instructions Fire alarm system EBL512 V2.3.x
fire alarms in the system.
FAULT: L-C mixed COM-loop x, CU xx
The two wires L (SA) and C (SB) have been mixed (alternated). Check
so that the wire connections are correct according to drawing 512-41.
FAULT: LON-board 1590, control unit xx
(TLON connection board, 1590)
No communication / connection with the TLON network. The board
has to be changed.
FAULT: Loop unit technical number xxxxxx
The communication with the unit is not all right, i.e. the unit is out of
order / faulty.
FAULT: Low battery capacity, CU xx
Battery internal resistance too high.
• The battery might be too old.
• Cables, fuses etc. for externally placed batteries might cause
a voltage drop.
• Check / adjust the rectifier (power supply) voltage (24 V
DC).
• Check the charging voltage over the battery respectively
(13.5-13.8 depending on the actual charging step).
•
Check the voltage over a disconnected battery (fully charged
> 13 V).
FAULT: Low main PWS, control unit xx
• Mains voltage below 187 V AC. Blown fuse (230 V AC) or
no voltage.
• Rectifier voltage below 21 V DC. Fuse F1 on the charger
board 1557 / 1657 is blown.
FAULT: Low voltage, control unit xx
System voltage < 21 V DC. Check / adjust so that the rectifier output
voltage is 24 V DC.
53