Page 12 SA-441 Installation and Operating Instructions
CP4816A 11/6/01
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(s) or improper installation. The following chart shows typical symptoms and possible
causes.
A blown rear panel fuse doesn't necessarily mean that the unit is bad. If a speaker or speaker
lead is shorted this fuse will blow before the unit is damaged. Disconnect the SPKR leads and
replace the fuse. If the siren emits a sound when in the Yelp position it is OK. Check the
speaker(s) or leads for possible shorting.
PROBLEMS
Symptom
Possible Cause
Check
No power
Power switch not turned on
Connector loose
Fuse blown
Loose connection at power source
Does backlighting come on?
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 tone
- PA works
High Voltage Protection
Mic button stuck
The input voltage must be less than 16 volts.
Does mic button release properly?
No PA
PA volume not set properly
Have you tried turning the PA volume control?
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?
The input voltage must be greater than 9 volts.
Intermittent
siren tone
High Voltage Protection
Connector loose
Bad power connection
Mic button activation
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 something lying on the microphone?
Is a circuit breaker used with at least a 50A rating?
Horn function
Or Manual
stuck on
Siren switch stuck
Aux Input improperly connected
Does the Siren switch return fully when released?
Is the Aux Input used and wired properly?
No Radio
Unit not connected to radio
Radio volume too low
Is the radio connected properly to the unit?
Can you here the radio in the vehicle?
Have you tried turning the RAD volume control?
Wrong siren
tone
Two-Tone option installed
Ground system noise
Is the Two-Tone option switch turned on?
Are Control head and amplifier connected to good
ground?
Phaser not
working
Phaser disabled
Is the Phaser Disable option switch turned on?
Horn not
working
Horn disabled
Is the Horn Disable option switch turned on?
Dual switch
doesn’t work
Only one amplifier working
One speaker damaged
Is one fuse on the amplifier blown?
Have you tried replacing the speaker?
Constantly
blows fuses
Amplifiers wired incorrectly
Are SPKR A and SPKR B wired together?