Chapter 7: Service and troubleshooting
124 P/N 3101890-EN • REV 006 • ISS 21JUN18
System repairs
The VM-1 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 41: 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
S
ervice 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.
Precautions
Removing or replacing circuit board modules
When removing or replacing circuit modules, always remember to:
• First disconnect the battery then remove AC power from the control panel. Removing or replacing circuit
modules when power is applied will damage the equipment.
• Avoid applying excessive force to the snap-rivet fasteners that lock the plug-in modules in place. If needed,
use the extraction tool provided in the hardware kit.