Technical data

Chapter 8: Troubleshooting
8.2.1 Procedure A
If the green PWR LED is “OFF” and all other LEDs are “OFF,” a power loss condition has
occurred. A power loss condition may be caused by:
• Loss of AC input voltage and battery back-up voltage.
• Faulty wiring of the AC power cord and batteries missing or low.
• Faulty motherboard.
Perform the following:
1. Check for 120 VDC at TB9 on the motherboard. If voltage is not present, check for AC
input wiring. If AC voltage is present, check to see if fuse (F2) is blown. If F2 is blown,
replace the fuse (250V, 10A)
2. Check for at least 18.5 VDC at TB10 (Battery terminals). If sufficient voltage is present,
check to see if fuse (F1) is blown. If F1 is blown, replace the fuse (125V, 8A).
3. If the problem persists, replace the motherboard.
NOTE: Mark all wires before removing components. When the trouble is repaired, and before
testing, replace all wires to the proper locations and replace all covers.
8.2.2 Procedure B
If the green PWR LED is “ON,” the yellow SYSTEM TROUBLE LED is “ON,” and both D96
and D97 are ON, the SP40S panel is in an Overcurrent state.
• Check the strobe output for excessive current calculation. (2.0A for strobe circuit).
Perform the following:
1. If excessive current is calculated, remove appliances until the strobe current is below 2.0
Amps.
2. If excessive current does not exist, and strobe output is not operating, reset the SP40S by
removing AC and battery power.
3. Wait 30 seconds and reapply power. AC first and then batteries.
SP40S Multi-Function Facility Communication System Manual, Revision D
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