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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High Resistance Fault
Description
Measurement
Possible Cause
Action Required
Resistance
Voltage
Zone 1 Open
Circuit Fault
> 4k2
Ω
> 26.2 V DC
The input or output is measuring the
indicated voltage or resistance range,
across the negative and positive
terminals.
Check cabling and routes for physical
damage.
Zone 2 Open
Circuit Fault
> 26.6 V DC
(For IS Zone)
Ensure correct value EOL is in place.
Zone 3 Open
Circuit Fault
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 device termination and
polarity.
Zone 4 Open
Circuit Fault
If open circuit fault persists after
completing above checks, break zone
cabling at the field devices, in smaller
sections, to reduce the search area.
Zone 5 Open
Circuit Fault
In addition, the resistance should be
measured with the input or output
cabling removed from the Main PCB
(disconnect terminal block).
Zone 6 Open
Circuit Fault
If the problem persists, please contact
your supplier.
Zone 7 Open
Circuit Fault
Once the resistance measurement
confirms you have an open circuit
fault on the field cabling proceed to
"Action Required”.
Zone 8 Open
Circuit Fault
Input 1 Open
Circuit Fault
> 4k2
Ω
> 0.8 V DC
If the cable is clear, insert an EOL
across the affected input or outputs
terminals, at the panel, to confirm
that the product is not faulty.
Input 2 Open
Circuit Fault
Sounder 1 Open
Circuit Fault
> 0.8 V DC
If the problem persists, please
contact your supplier.
Sounder 2 Open
Circuit Fault