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Page 14 of 16 SC-1002 / 1012 / 1022-10 14 Installation Instructions
2/20/08 CP4997B
SERVICE
This unit is designed to provide years of reliable service under even the worst conditions. Many
times there may appear to be a problem with the unit when the true problem is in the speaker,
controlled devices, or improper installation. The following chart shows typical symptoms and
possible causes.
A blown siren fuse doesn't necessarily mean that the unit is bad. If a speaker or speaker lead is
shorted the fuse will blow before the unit is damaged. Disconnect the SPKR leads and replace
the fuse. If the OUTPUT light comes on with siren power enabled and Wail mode selected it is
OK. Check the speaker or leads for possible shorting.
PROBLEMS
See www.carsonsirens.com for additional information
or contact our Service Department at:
E-mail service@carsonsirens.com or Phone (888) 577-6877.
Symptom Possible Cause Check
No power or siren
output
No power to enable input (org wire)
Bad speaker
Connector(s) loose
Rear panel fuse blown
Loose connection at power source
Does backlighting or POWER light come on?
Is the OUTPUT light on face coming on in Wail?
Do you hear a "pop" when turned on?
Is an external fuse or circuit breaker used?
Are the negative leads connected to a good ground?
No siren tones Bad Speaker
High Voltage Protection
Is the OUTPUT light on face coming on in Wail?
Input voltage must be less than highest rated voltage.
Distorted siren
sound
Speaker assembly loose
Intermittent Aux Input connection
Low vehicle voltage
Is the speaker bell or tip loose?
Is the Aux Input used and wired properly?
Input voltage must be greater than lowest rated voltage.
Intermittent siren
tone
High Voltage Protection
Connector loose
Bad power connection
Circuit breaker in supply connection
Is the vehicle voltage regulator working properly?
Is the connector tight on the back of the unit?
Is there a loose connection on a power lead?
Is a circuit breaker used with at least a 50A rating?
Horn function
stuck on or
Manual stuck on
Horn or Manual switch stuck
Aux Input improperly connected
Aux Input Polarity Option set wrong
Does the horn or manual switch return when released?
Is the Aux Input used and wired properly?
Is the AUX_P option properly configured?
Wrong siren tone Two-Tone option installed
Tones disabled.
Is the T-T option selected?
Check option switch settings.
Some siren tones
not working
Tone disabled Check option switch settings.
Light switches not
working
Loose output connections
Rear panel fuse blown
Do the Light Control switch indicators light?
Is the corresponding fuse blown?