Chapter 1: Maintenance
6
ZP3-ECU Extinguishing Control Unit Maintenance Manual
Quarterly maintenance – Extinguishing Status Units
If any ZP3-ECUS status units are attached to the ECU, check that their LED
indicators mirror those of the ECU.
With the actuator still disconnected, do the following:
1. Remove jumper L1 from the extinguishing display board of the ZP3-ECUS
status unit most remote from the ECU. Check that the Fault LEDs illuminate
on both the status unit and the ECU. Check that the fire alarm control panel
indicates a fault.
2. Reinsert jumper L1 that was removed in the above step. Check that the Fault
LEDs go out on both the status unit and the ECU. Accept and Reset the fault
on the control panel.
3. Repeat steps 1 and 2 above, but using jumpers L2 and L3 instead of
jumper L1.
4. Activate one of the inputs mapped to activate the ECU (using canned smoke
to activate a smoke detector if required).
5. Check that the red Fire LEDs on the front fascia of the status units illuminate.
6. Silence the fire bell output on the ECU by means of the Silence button on the
front fascia of the status unit. Check that the bell output responds accordingly.
7. Activate the second input mapped to activate the ECU (using canned smoke
to activate a smoke detector if required).
8. Check, after the delay time, that the Extinguishant Discharged LED on the
front fascia of the status unit is illuminated, while monitoring the time taken for
this operation.
9. Turn the Locked Off/Reset key switch on the front fascia of the status unit and
check that the Locked Off/Reset LEDs on the ECU and status units illuminate.
Check that the extinguishant discharge siren connected to the ECU silences.
10. Accept and reset the fire alarm control panel by turning the Locked Off/Reset
key on the status unit to Reset. Check that the Locked Off/Reset LEDs go off
on the ECU and status units.
11. Test the hold off operation by completing tests in steps 1, 2, 4, 5, 6, and 7
above. Wait 10 seconds and press the Hold Off Extinguishant Release
button. Measure the time between the activation of the Extinguishant
Discharged LEDs and releasing the Hold Off Extinguishant Release button.
The measured period, which is the configured delay setup by VR1 (on the
main board), should be the same as the time noted in step 8. Confirm that this
is the correct delay time required.
12. Repeat steps 9 and 10 to reset the unit.
