Chapter 7: Service and troubleshooting
EST3X Technical Reference Manual 169
System repairs
The EST3X life safety system is made up of modular assemblies that are easily
installed and maintained. Because of the modular design, component level field
repairs mainly consist of isolating a fault to the circuit card in an assembly and
replacing the defective card.
The following table provides a general guideline of recommended spare
components to have on hand.
Table 37: Recommended spares list
Minimum of 1 each or 10% of the
quantity
installed
Minimum of 3 each or 10% of the
quantity installed
Power supply
Option cards
Amplifiers (if no backup installed
in system)
Printer ribbon
• Monitor modules
• Control modules
• Heat detectors
• Ionization smoke detectors
• Photoelectric smoke detectors
• Detector base
• Duct detector filter kits
• Breakglass replacement for pull stations
• Breakglass replacement for warden stations
• Horn, bell, strobe, and speaker
Service and repair of system components centers around the following
assumptions:
• Qualified technicians possessing a complete understanding of the system
hardware and functions will perform maintenance.
• Only certified maintenance technicians will service the equipment.
• Maintenance technicians will have a readily available supply of replacement
parts.
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