PREMIER AD INSTALLATION MANUAL.
Software:31/3/04 & LC6
Approved Document No: GLT.MAN-105
PAGE 21
Issue : 1.02 Authorised: GH Date: 15/03/2004
11.4 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 , eg an oscilloscope , to
the panel can give an earth fault)
The voltage between battery –Ve and earth should be 14-16 volts. If it is not, the voltage should
indicate what is shorting to earth.
***DO NOT DISCONNECT THE MAINS EARTH CONNECTION. THIS WILL CAUSE A PROBLEM
WITH THE PANELS OPERATION***
11.5 DOUBLE ADDRESS
This indicates that a double address has been detected. This usually happens if a head is replaced
during maintenance, and its address has been wrongly set. The panel will report 2 fault addresses,
one will be the double address, and the other will be a missing device. As a further aid to finding the
fault, the panel will light the LEDs of any detectors with a double address (Call points, Sounders & I/O
units will not be indicated as they have no panel controlled LED to light up)
11.6 SYSTEM FAULT
A system fault is an abnormal microprocessor running condition due to various unexpected
phenomena
This will result in the panel attempting to correct itself. Should this fault occur, the System Fault LED,
General Fault LED, General Fault relay and fault internal buzzer will be constantly active until the
control keyswitch is turned from off position to control enable position. This should cause this fault
condition to reset. If not, consult your supplier.
**Note that the system fault LED will Light if the Write enable switch is left on after entering a device
message. This is to warn of the risk of erasing the stored data. Use the keyswitch to reset after the
switch has been turned off.
11.7 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.
11.8 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 fault LED will flash for an open circuit fault, and will be steady for a short circuit 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.
*** FAULT ***
Earth Fault
*** FAULT ***
Sounder Fault
Содержание NPAD
Страница 1: ...INSTALLATION MANUAL...
