Chapter 5: Diagnostics, maintenance, and testing 
 
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Panel door key 
Sound level meter 
•  A complete check of installed field wiring and devices should be made at regular intervals 
in accordance with NFPA 72, Canadian Electrical Code Part I, ULC-S524, and ULC-S536 
requirements. This includes testing all alarm and supervisory initiating devices and circuits 
and any off-premises connections. 
•  Panel operation should be verified in the alarm, supervisory, and trouble modes. 
•  To ensure that the panel can operate correctly when primary power is lost, the batteries 
should be inspected and tested periodically. Batteries should be replaced (at a minimum) 
every four years. 
Canadian tests for grounds, opens, and shorts 
ULC requires that you test ground fault, open circuit, and short circuit indications. 
For ground fault tests, short one leg of the circuit to chassis ground and verify that the system 
Ground Fault LED and Trouble LEDs turn on. 
For NAC open circuit tests, remove the end-of-line resistor from the last device on the circuit 
and verify that the system Trouble LED turns on. 
For NAC short circuit testing, place a short across the NAC output terminals and verify that the 
system Trouble LED turns on. 
For AUX power short circuit testing, place a short across the AUX power output’s plus (+) and 
minus (−) terminals and verify that the system Trouble LED turns on. 
For annunciator communications testing, place a short across channel 1  
(+ and −) and verify that the system Trouble LED turns on. Repeat for channel 2. 
Electronic testing of a device (test fire) 
A test fire is a test activation of a smoke or heat detector or input module. A test fire can be 
conducted to test for proper operation of a detector or input module and its programming. 
When a detector is test fired, the panel sends a command to the detector at which time the 
detector simulates a smoke or heat buildup, causing an actual activation of the detector. When 
an input module is test fired, the panel sends a command to the module causing the module to 
simulate an activation (alarm, supervisory, or monitor). 
Notes 
•  A test fire is not an equivalent substitute for required functional testing per NFPA 72. In all 
cases, the manufacturer's documented testing procedures should be followed in 
accordance with all applicable codes, standards, and methods approved by the AHJ 
•  NAC responses activate as programmed.