Doc. No. 503-0800ZE-M-01
ZP3-ECU Maintenance Manual
Page 8
Issue 1 (01/08/2006)
Device Unaccepted
During initialisation on power up the panel checks all devices, noting the device type at each
address. This process can also be initiated through the Setup menu (see Installation and
Commissioning Manual, document number 503-0800ZE-I-01). A “Device Unaccepted” fault is
raised when a device cannot be accepted.
Indications
•
Yellow Fault LED is lit.
•
Fault buzzer sounds.
•
Event is shown on the display, for example:
UNACCEPTED Zone 001 Dev 001
Event 001
Second Floor, Laundry Room
•
Event is printed (if printer configured).
Possible Causes
If the unaccepted devices refer to an Extinguishing Control Unit, the possible causes are:
•
Open circuit, short circuit, or missing end-of-line (EOL) resistors on field wiring.
•
Loop wiring out of specification resistance/capacitance.
•
Loose or high resistance connection on the field wiring terminals.
•
An Extinguishing Control Unit that is out of calibration or is faulty.
•
Interference on the line to which the device is attached.
Corrective Actions
1.
Press the ACCEPT button to accept the fault. If this fault has been raised for a number of
devices on the same line then there may be interference on the line. If this does not apply
then proceed to the next point.
2.
Note the ECU in need of attention, and then show the analogues for the two addresses
applicable to that device on the display by using the maintenance menu report analogue
facility.
3.
Check that slot 5 analogue reading is not less than 59 counts or more than 188 counts. Above
or below would indicate an open circuit or shorts on the field wiring respectively.
4.
The extinguishing relay reading should also have an analogue reading in slot 6 of between 39
and 198.
5.
Take the appropriate actions to fix the problems identified in steps 3 or 4.
6.
Remove power from the panel and then re-apply power. This initialises the panel and the
devices and the previously unaccepted device should now be accepted.
