Panasonic EBL128 Operating Instructions Manual page 62

Panasonic Eco Solutions Nordic AB
MEW01623 Rev: -
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). There will also be a "FAULT: No reply ....." message for
each unit that EBL128 cannot find and "FAULT: Several faults ...".
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NOTE! Each 10 minute a new attempt is made to communicate in
the A-direction only.
When all breaks are repaired (corrected) the communication
automatically returns to communicate in the A-direction only.
FAULT: Earth fault (minus)
FAULT: Earth fault (plus)
Earth fault is detected. The system voltage is normally 24 V DC.
+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 cannot be
guaranteed. Call for service personnel/engineer.
FAULT: Earth fault, techn address xxx
This is valid for an external power supply (e.g. 3366) connected on the
COM loop. Check all cables connected to the unit.
FAULT: EPU x
EPU=1728. (Ext. Presentation Unit)
The unit is programmed as another type of unit than the SSD says or a
faulty unit.
FAULT: Expansion board x
Valid for the 8 zones exp. board 4580, the 8 relays exp. board 4581
and the Inputs and outputs exp. board 4583 mounted in the c.i.e.
(EBL128). Also valid for the I/O Matrix board 4582 connected on the
COM loop, i.e. mounted outside the c.i.e.
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The fault has to be acknowledged and it can last up to 10 minutes before
the communication returns to communicate in the A-direction only.
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EBL128 Operating Instructions V2.0.x
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