Instruction manual

7-4
Procedure B
If the green AC LED is “ON”, yellow TROUBLE LED may or may not be “ON”, no other LED’s are
“ON” and there is no audio output and or strobe output the SP40/2 is in an overcurrent state:
Check the strobe output (if applicable) and the speaker output for excessive current calculation.
(2.0A for strobe circuit, 1.6 Amps for audio circuit, and 0.5 Amps for auxiliary power)
Perform the following:
1. If excessive current is calculated remove appliances until the strobe current is below 2.0
Amps and the audio circuit current is below 1.6 Amps (Refer to Section 3-8, Alarm Current
calculation on Page 3-20).
2. If excessive current does not exist and audio and/or strobe outputs are not operating the
SP40/2 must be reset by turning it off and reenergizing it. Remove battery power first, then
remove AC power. Wait 30 seconds. Apply AC Power first, then apply battery power. This
will reset the Overcurrent circuit.
Procedure C
If the green AC LED is “ON”, yellow TROUBLE LED is “ON” and D10, BAT LED is “ON”, Battery
Voltage is below 18.5VDC or battery is missing. A battery trouble condition might be caused by:
1. Battery charging section of Motherboard is inoperable.
2. Batteries are missing.
3. Batteries are defective.
4. Battery wiring is incorrect.
Perform the following:
1. Check for 24VDC at ± BAT connection at TB1 on the motherboard. If the voltage is below
18.5VDC, battery-charging section of the motherboard is inoperable. Replace the
Motherboard.
2. Check battery compartment for the presence of batteries. If batteries are not installed, install
them.
3. Insure that batteries are properly wired. See Figure 7-2 on Page 7-8.
4. If Steps 1 through 3 are satisfied replace batteries.
Procedure D
If the green AC LED is “OFF”, yellow TROUBLE LED is “ON”, and D9, AC LED is “ON”, 24VDC
on +/- IN connection (TB1) is low or missing. An AC trouble condition might be caused by:
1. AC input missing or low.
2. No AC voltage to the AC Monitor Circuit.
3. Faulty internal wiring between the rectifier module and TB1 on the motherboard.
4. Rectifier module trouble.
5. A faulty Motherboard.
Perform the following:
1. Check AC input.
2. Check fuse F2 on motherboard.
3. Check wiring between the rectifier assemble and TB1 on the motherboard.
4. Check for 24VDC at TB1. If voltage is not present, replace rectifier module. If voltage is
present replace motherboard.