Chapter 1: Maintenance
ZP3-ECU Extinguishing Control Unit Maintenance Manual
3
Maintenance prerequisites
Before performing any maintenance, make sure that:
• Small hand tools are available for testing, connecting, disconnection, etc.
• A good multimeter (preferably digital) is available.
• The available drawings indicate correct device positions, device addresses,
and types with all relevant wiring runs.
• A record is available of how the fire system has been configured. The system
specification should provide a detailed description of all aspects of the
extinguishing system such as:
• Assumptions about the environment in which the fire system is to operate.
• The model of the control panel to which the extinguishing unit is
connected.
• The version number of panel software used.
• Type of extinguishing cylinders/equipment and extinguishant details.
• Physical layout of loops and devices. The type and the address applicable
to each extinguishing control unit should be recorded.
• The organisation of devices into logical zones as affects the extinguishing
system.
• Cause and affect rules programmed into the panel (input/output
mappings), which affect the extinguishing control unit.
• Any custom controls or features.
• Field wiring drawings for the system.
The system specification is the blueprint for how the system should be configured
and how it should perform. The system specification is essential for when the
system is extensively tested and checked during servicing. Without such a
specification there is no final arbitration as to what is the correct behaviour of the
system. It is important to keep the specification up-to-date. Whenever changes
are made to the system the specification should be updated to reflect those
changes.
