Zeta NPAD 2, Installation Manual

PREMIER AD INSTALLATION MANUAL.  

Software:PANEL:R1107 & LOOP:R1062 

Approved Document No: GLT.MAN-105A

PAGE 28

Issue : 2.02         Authorised: GH      Date: 16/07/2007 

15.8 PRE-ALARM 

 
This is not a fault condition. The panel has detected a high reading from one of the devices on 
the loop. This could be caused by a fire starting (in which case it acts as an early warning), or 
it could be caused by a contaminated head. The panel will report the location of the problem 
device, which should then be investigated. 
 

15.9 SOUNDER FAULTS 

 
On the premier AD there are separate fault indications for each  
sounder circuit, and a separate one for the loop sounders. 
 
 
Conventional sounders: 
 
The screen will show which sounder circuit has the problem, and whether there is an open or short 
circuit fault. The fault LED for that sounder circuit will light steady for either fault. 
 
Check that the correct END of Line resistor has been fitted. (10K – brown, black, orange, gold) 
Check that all sounder fuses are OK (FS4, FS5,FS6 & FS7 – 250mA TD) 
If working on an existing installation, check that the devices are 

polarised

. (See Page 5) 

Check cable continuity (remove from panel and measure continuity. Should read 10K) 

Loop controlled sounders: 

If sounder circuit controllers are used, check as per conventional sounder, and also check its power 
supply. 
For loop powered sounders, check that all sounders are communicating, and check their analogue 
value. If a sounder is returning a value less than 8, then it has detected an internal fault and should 
be replaced. 
If they are not communicating, then check that they have power, and that the power is connected the 
correct way. If they have power, they may be damaged. Try a replacement if available. 
 

15.10 LOOP WIRING FAULTS 

 
A loop fault can be caused by a break, or short circuit in the 
Loop wiring. Open the panel and look for the 4 green LEDs on  
the termination PCB. Under normal conditions these should be 
all lit steady. The LEDs represent Loop1 Side A, Loop 1 side B, 
Loop2 Side A and Loop 2 side B. 

If both loop LEDs for either loop are off, then this indicates that there is a short on the loop that the 
isolators couldn’t bypass. (Check that the isolators are enabled, and aren’t set for a cable continuity 
check). Split the loop half way, and check if either side of the loop will power up. Continue making 
more splits until the short has been found. 

If the LEDs for a loop are flashing (both on, side a only, both on, side b only etc), then this indicates a 
break in the wiring. This could be caused by either a break, or a pair of isolators shutting down a 
short circuit. If there are several missing devices (wait for the zone fault LED & check the addresses 
in that zone), then there is probably a short circuit on the loop (look for isolators lit Yellow or flashing). 
The missing devices should give an indication of the section with the break. Investigate that section 
as per the dead short circuit fault tracking method, as described above. 

If there are no missing devices, then there is probably a simple break. If the loop has been configured 
such that as you move down the loop, the address always increases, then the fault can be located 
through the menu. 

Go to view device screen. And select the first device on the loop. The screen will say either Side A 
only or Side B only. Scroll through the loop. When it changed from Side A only to Side B only (or Vice 
versa), this should be the location of the break. 

Alternatively, disconnect one side of the loop and check which devices can be read. The break 
should be after the last read device. 
 
 

  ***  FAULT  *** 

       1 of 1 
     

   Sounder 1 Open

  ***  FAULT  *** 
       1 of 1 

 Loop 1 Cable Fault