ORYX202 ORYX204 ORYX208 Conventional Fire Panels
– INSTALLATION & OPERATION MANUAL
PRMAN-0047 ORYX200 S21 Fire Panel Range Rev 02.00 220224.docx
E&OE
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False Fire Alarms and Activations
Description
Measurement
Possible Cause
Action Required
Resistance
Voltage
Z1 Fire
220
Ω –
900
Ω
14.5 V DC
–
22.5 V DC
The input or output is measuring
the indicated voltage or
resistance range, across the
negative and positive terminals.
Ensure all areas are free of false activations.
Z2 Fire
20.9 V DC
–
24.1 V DC
(For IS Zone)
Ensure correct value EOL is in place.
Z3 Fire
To confirm the panel’s
indications, Voltage should be
measured across the input or
output whilst the field cabling is
connected to the Main PCB.
Check field devices for activations.
Z4 Fire
If the problem persists, please contact your
supplier.
Z5 Fire
In addition, the resistance should
be measured with the input or
output cabling removed from the
Main PCB (disconnect terminal
block).
Z6 Fire
Z7 Fire
Once the resistance
measurement confirms you have
a false fire condition on the field
cabling proceed to "Action
Required".
Z8 Fire
Input 1 Activated
220
Ω –
900
Ω
0.06 V DC
–
0.20 V DC
If the problem persists, please
contact your supplier.
Input 2 Activated