Chapter 3: Fault finding – ECU faults
16
ZP3-ECU Extinguishing Control Unit Maintenance Manual
ECU main board fault LEDs
Six LEDs are provided on the ECU main board for fault diagnosis (see Figure 1
Note:
Indicated current ratings are dependant upon the capacity of the power
supply unit
.
Figure 1: ECU main board fault LEDs
.
1. Extinguishant Pressure Low LED
2. Fire Bell Fault LED
3. Detonator Fault LED (ensure that the ECU is not Locked Off)
4. Extinguishing Bell Fault LED
5. Extinguishing Relay LED (activates when its configured address is activated)
6. Relay LED (activates when its configured address is activated)
