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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 internal fuse doesn't necessarily mean that the unit is bad. If a speaker or speaker lead is shorted the internal 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 or siren | Power switch not turned on | Does backlighting come on? |
output | Bad speaker(s) | Do you hear a "pop" when turned on? |
| Connector loose | Is an external fuse or circuit breaker used? |
| Internal fuse blown | Are the negative leads connected to a good ground? |
| Loose connection at power source |
|
No siren tone - | High Voltage Protection | The input voltage must be less than highest rated voltage. |
PA works | Mic button stuck | Does mic button release properly? |
| Cutout activated | Does the siren work when Cutout input is disconnected? |
| Cutout Polarity Option set wrong | Is the CUT P option properly configured? |
No PA | PA volume not set properly | Have you tried turning the PA volume control? |
| Selector in Radio position | PA is not available in the Radio position |
Distorted siren | Speaker assembly loose | Is the speaker bell or tip loose? |
sound | Intermittent Aux Input connection | Is the Aux Input used and wired properly? |
| Low vehicle voltage | Input voltage must be greater than lowest rated voltage. |
Intermittent siren | High Voltage Protection | Is the vehicle voltage regulator working properly? |
tone | Connector loose | Is the connector tight on the back of the unit? |
| Bad power connection | Is there a loose connection on a power lead? |
| Mic button activation | Is something lying on the microphone? |
| Circuit breaker in supply connection | Is a circuit breaker used with at least a 50A rating? |
Horn function | Horn switch stuck | Does the horn switch return fully when released? |
or | Man/Phsr switch stuck | Does the Man/Phsr switch return fully when released? |
Manual or Phaser | Aux Input improperly connected | Is the Aux Input used and wired properly? |
stuck on | Aux Input Polarity Option set wrong | Is the AUX P option properly configured? |
No Radio | Unit not connected to radio | Is the radio connected properly to the unit? |
| Radio volume too low | Can you here the radio in the vehicle? |
|
| Have you tried turning the RAD volume control? |
Wrong siren tone | Is the | |
| Aux Input set to wrong function | Is the AUX I jumper configured properly? |
Phaser not work- | Phaser disabled | Is the PHSR option jumper cut? |
ing |
|
|
Horn not working | Horn disabled | Is the trace cut that disables the Horn switch? |
Automatic Siren | Siren Control in RAD position | Is the siren set to the RAD position? |
not working | Automatic Siren disabled | Is the lead cut between the lever switch board and the |
|
| siren board? |
Automatic Siren | No power to lever switch board | Do the lever switch indicators light fully? |
works in all posi- |
| Do the lights work with the lever switch on? |
tions |
|
|
Lever switch not | No power to lever switch board | Do the lever switch indicators light? |
working at all | No ground at siren connector | Does the siren work? |
Lever switch not | Loose output connection on lever | Does the lever switch indicator work in those positions? |
working in some | switch lead |
|
positions |
|
|
Rocker switch not | No power to rocker switch | Is the corresponding fuse blown? |
working | Loose rocker switch output lead | Does the rocker switch light when turned on? |
05/07/05 | CP4842C |
