Smart Connect
Single Loop Touch Screen Panel
Doc: GLT-229-7-1
79
Issue: 3
Date: 12/05/2017
Charger Fault
The panel has determined that the power
supply is not charging the batteries.
This is likely to be a problem with the
Charger PCB. Contact your supplier to
arrange a replacement charger PCB
Battery high
impedance fault
The panel has measured the battery internal
resistance and has determined it is too high.
The batteries will need to be replaced.
12.5 EARTH FAULTS
An EARTH fault indicates that something is shorting to earth (usually through the cable screen). Disconnect the earth screens one at
a time to determine the problem line. (Note: connecting other equipment, e.g. a mains powered laptop, to the panel can give an
earth fault)
The earth fault message will indicate if it is a Positive or Negative voltage shorting to earth.
Earth Positive Fault
Most Earth faults occur on the Addressable
loop. As a first check disconnect all the loop
connections, and reset the panel. If no earth
fault is reported the fault is on the loop.
Locate the fault by splitting the loop in half,
connecting one side of the loop at a time,
then sub dividing the “bad section”. Look
for the cable screen shorting to loop +
If the fault is not on the loop, use a similar
method to investigate all other circuits.
Earth Negative
Fault
Use the same method , but look for shorts
to loop -ve
Note that for the on board conventional sounder circuits, in the off condition, both s and sounder – terminals are POSITIVE
with respect to earth, so a short circuit to either would give a positive earth fault.
***DO NOT DISCONNECT THE MAINS EARTH CONNECTION. THIS WILL CAUSE A PROBLEM WITH THE PANELS OPERATION***
